Older GCN Circulars Archive

1. Circulars 27000-27999
2. Other Circulars

To learn more about the GCN Circulars and how to subscribe.

1) Listed in reverse serial number order -- newest first: 27000 - 27999:

• 27999 GRB 200613A: R-band observations from HCT
  
• 27998 GRB 200613A: Further Liverpool Telescope observations
  
• 27997 IceCube-200620A - IceCube observation of a high-energy neutrino candidate track-like event
  
• 27996 GRB 200619C: Fermi GBM Final Real-time Localization
  
• 27995 Fermi GRB 200619B: Global MASTER-Net observations report
  
• 27994 GRB 200619B: AstroSat CZTI detection
  
• 27993 GRB 200619A: Fermi GBM observation
  
• 27992 Fermi trigger No 614239407: Global MASTER-Net observations report
  
• 27991 GRB 200619A: AGILE detection
  
• 27990 LIGO/Virgo MS200618aq: Retraction of a test binary neutron star candidate
  
• 27989 LIGO/Virgo MS200619bf: Retraction of a test binary neutron star candidate
  
• 27988 LIGO/Virgo MS200618bx: Retraction of a test binary neutron star candidate
  
• 27987 LIGO/Virgo MS200618bq: Retraction of a test binary neutron star candidate
  
• 27986 GRB 200619B: Fermi GBM Final Real-time Localization
  
• 27985 GRB 200619A: Insight-HXMT/HE detection
  
• 27984 Fermi trigger No 614226976: Global MASTER-Net observations report
  
• 27983 GRB 200613A: continued Kitab optical observations
  
• 27982 GRB 200613A: SAO RAS optical observations
  
• 27981 GRB 200617A: Insight-HXMT/HE detection
  
• 27980 IceCube-200530A - SN2020lls likely unrelated
  
• 27979 Swift/UVOT Observations of IceCube 200615A
  
• 27978 GRB 200613A: Mondy optical observations
  
• 27977 LIGO/Virgo MS200614ct: Identification of a test binary black hole candidate
  
• 27976 Fermi trigger No 614103490: Global MASTER-Net observations report
  
• 27975 Baksan Neutrino Observatory Alert 200617.47: Global MASTER-Net observations report
  
• 27974 GRB 200615B: CALET Gamma-Ray Burst Monitor detection
  
• 27973 Swift-XRT observations of IceCube 200615A
  
• 27972 IceCube-200615A: No significant detection in HAWC
  
• 27971 GRB 200613A: Jet-break from Xinglong-2.16m optical observations
  
• 27970 Fermi-LAT Gamma-ray Observations of IceCube-200615A
  
• 27969 IceCube-200614A: No significant detection in HAWC
  
• 27968 IceCube-200615A: Upper limits from a search for additional neutrino events in IceCube
  
• 27967 GRB 200616B: Fermi GBM Final Real-time Localization
  
• 27966 Fermi-LAT Gamma-ray Observations of IceCube-200614A and detection of a new gamma-ray source, Fermi J0202.8+3132
  
• 27965 LIGO/Virgo MS200615ce: Identification of a test binary black hole candidate
  
• 27964 GRB 200613A: CALET Gamma-Ray Burst Monitor detection
  
• 27963 LIGO/Virgo MS200614bz: Test Identification of a binary neutron star candidate
  
• 27962 GRB 200613A: MITSuME Akeno optical upper limits
  
• 27961 Fermi GRB 200616A: Global MASTER-Net observations report
  
• 27960 GRB 200615B: MAXI/GSC detection
  
• 27959 GRB 200616A: Fermi GBM Final Real-time Localization
  
• 27958 GRB 200613A: continued AbAO optical afterglow observations
  
• 27957 IceCube-200615A: Upper limits from Fermi-GBM Observations
  
• 27956 IceCube-200614A: Upper limits from a search for additional neutrino events in IceCube
  
• 27955 IceCube-200614A: not observable by Fermi-GBM
  
• 27954 IceCube-200615A: No counterpart candidates in INTEGRAL SPI-ACS prompt observation
  
• 27953 IceCube Alert 200615.62: Global MASTER-Net observations report
  
• 27952 IceCube-200614A: No counterpart candidates in INTEGRAL SPI-ACS prompt observation
  
• 27951 LIGO/Virgo MS200615h: Retraction of a test binary neutron star candidate
  
• 27950 IceCube-200615A: IceCube observation of a high-energy neutrino candidate event
  
• 27949 GRB 200613A: Continued Xinglong-2.16m optical observations
  
• 27948 Fermi GRB 200615A: Global MASTER-Net observations report
  
• 27947 GRB 200615A: Fermi GBM Final Real-time Localization
  
• 27946 Baksan Neutrino Observatory Alert 200614.34: Global MASTER-Net observations report
  
• 27945 IceCube Alert 200614.53: Global MASTER-Net observations report
  
• 27944 GRB 200613A: Swift/UVOT Detection
  
• 27943 GRB 200613A: Xinglong-2.16m optical observations
  
• 27942 Fermi GRB 200614A: Global MASTER-Net observations report
  
• 27941 IceCube-200614A - IceCube observation of a high-energy neutrino candidate track-like event
  
• 27940 GRB 200614A: Fermi GBM Final Real-time Localization
  
• 27939 GRB 200613A: Liverpool Telescope observations
  
• 27938 GRB 200613A: OAJ Afterglow: Error in Coordinates
  
• 27937 GRB 200613A: Kitab and AbAO optical afterglow observations, host galaxy candidate
  
• 27936 GRB 200613A: Swift-XRT afterglow detection
  
• 27935 GRB 200613A: Candidate afterglow from OAJ
  
• 27934 GRB 200612A: Fermi GBM detection
  
• 27933 Fermi GRB 200613A: Global MASTER-Net observations report
  
• 27932 GRB 200613A: Swift ToO observations
  
• 27931 GRB 200613A: Fermi-LAT detection
  
• 27930 GRB 200613A: Fermi GBM observation
  
• 27929 GRB 200612A: Swift/UVOT Upper Limits
  
• 27928 Baksan Neutrino Observatory Alert 200611.74: Global MASTER-Net observations report
  
• 27927 BALROG localization (Fermi Trigger 613719013 / GRB 200613229)
  
• 27926 GRB 200613A: Fermi GBM Final Real-time Localization
  
• 27925 Draft-version submission removed.
  
• 27924 GRB 200612A: Swift-BAT refined analysis
  
• 27923 GRB 200612A: Swift-XRT refined Analysis
  
• 27922 Konus-Wind observation of ultra-long GRB 200612A
  
• 27921 GRB 200612A: Enhanced Swift-XRT position
  
• 27920 GRB 200612A: Late Optical Maximum Deteted by MASTER
  
• 27919 GRB 200612A: BOOTES-3/YA optical upper limit
  
• 27918 Fermi trigger No 613630183: Global MASTER-Net observations report
  
• 27917 Swift GRB200612.19: Global MASTER-Net OT detection
  
• 27916 Swift GRB200612.19: Global MASTER-Net observations report
  
• 27915 GRB 200612A: Swift detection of a burst
  
• 27914 GRB 200609A: Insight-HXMT/HE detection
  
• 27913 GRB 200608A: Swift-BAT refined analysis
  
• 27912 Konus-Wind detection of GRB 200605A
  
• 27911 GRB 200605A: CALET Gamma-Ray Burst Monitor detection
  
• 27910 IceCube-200530A - SN2020lam classified as SN II without evidence of CSM interaction
  
• 27909 GRB 200609A: Fermi GBM Final Real-time Localization
  
• 27908 Swift GRB 200608A: Global MASTER-Net observations report
  
• 27907 GRB 200608A: BOOTES-3 and BOOTES-4 optical upper limit
  
• 27906 GRB 200608A: Swift detection of a burst
  
• 27905 GRB 200607B: AstroSat CZTI detection
  
• 27904 GRB 200522A: Further HST F125W Observations
  
• 27903 Fermi GRB 200607B: Global MASTER-Net observations report
  
• 27902 GRB 200607B: Fermi GBM Final Real-time Localization
  
• 27901 Fermi GRB 200607A: Global MASTER-Net observations report
  
• 27900 IPN triangulation of GRB 200605A (short)
  
• 27899 GRB 200607A: Fermi GBM Final Localization
  
• 27898 GRB 200607A: BALROG localization (Fermi Trigger 613212114 / GRB 200607362)
  
• 27897 GRB 200530A: Fermi GBM detection
  
• 27896 GRB 200530A: CALET Gamma-Ray Burst Monitor detection
  
• 27895 Correction to the GCN 27886: Previous bursts of 1RXS J1708-4009 (Swift trigger 975998)
  
• 27894 1RXS J1708−4009: Swift-BAT refined analysis
  
• 27893 Fermi GRB 200605A: Global MASTER-Net observations report
  
• 27892 GRB 200605A: Fermi GBM Final Real-time Localization
  
• 27891 GRB 200530A: Fermi-LAT detection
  
• 27890 GRB 200604A: AstroSat CZTI detection
  
• 27889 Fermi trigger No 612988790: Global MASTER-Net observations report
  
• 27888 Fermi GRB 200604A: Global MASTER-Net observations report
  
• 27887 GRB 200604A: Fermi GBM Final Real-time Localization
  
• 27886 Swift detection of an SGR-like burst from 1RXS J1708−4009
  
• 27885 Baksan Neutrino Observatory Alert 200603.12: Global MASTER-Net observations report
  
• 27884 GRB 200529A: Swift/UVOT Upper Limits
  
• 27883 Konus-Wind observation of GRB200528A
  
• 27882 GRB 200601A: Insight-HXMT/HE detection
  
• 27881 IceCube-200530A: Upper limits from a search for additional neutrino events in IceCube
  
• 27880 Baksan Neutrino Observatory Alert 200601.42: Global MASTER-Net observations report
  
• 27879 Fermi-LAT Gamma-ray Observations of IceCube-200530A
  
• 27878 GRB 200529A: MITSuME Akeno optical upper limits
  
• 27877 Fermi GRB 200601A: Global MASTER-Net observations report
  
• 27876 GRB 200601A: Fermi GBM Final Real-time Localization
  
• 27875 IceCube-200530A: not observable by Fermi-GBM
  
• 27874 Fermi GRB 200531A: Global MASTER-Net observations report
  
• 27873 IceCube-200530A: No significant detection in HAWC
  
• 27872 IceCube-200530A: Candidate Counterparts from the Zwicky Transient Facility
  
• 27871 IceCube-200530A: No ANTARES neutrino counterpart
  
• 27870 GRB 200531A: Fermi GBM Final Real-time Localization
  
• 27869 IceCube Alert 200530.33: Global MASTER-Net observations report
  
• 27868 GRB 200529A: Swift-BAT refined analysis
  
• 27867 Konus-Wind observation of GRB 200524A
  
• 27866 IceCube-200530A: No counterpart candidates in INTEGRAL SPI-ACS prompt observation
  
• 27865 IceCube-200530A - IceCube observation of a high-energy neutrino candidate event
  
• 27864 GRB 200530A: AstroSat CZTI detection
  
• 27863 GRB 200529A: Swift-XRT refined Analysis
  
• 27862 Fermi GRB 200530A: Global MASTER-Net observations report
  
• 27861 GRB 200530A: Fermi GBM Final Real-time Localization
  
• 27860 GRB 200528A: CAHA Upper Limit
  
• 27859 GRB 200529A: Fermi GBM Detection
  
• 27858 GRB 200529A: LCO Optical Afterglow Detection
  
• 27857 Fermi GRB 200529B: Global MASTER-Net observations report
  
• 27856 Fermi trigger No 612429771: Global MASTER-Net observations report
  
• 27855 GRB 200528A: CALET Gamma-Ray Burst Monitor detection
  
• 27854 GRB 200529B: Fermi GBM Final Real-time Localization
  
• 27853 GRB 200529A: BOOTES-2/TELMA early optical upper limit
  
• 27852 GRB 200528A: Swift-XRT refined Analysis
  
• 27851 GRB 200524A: SAO RAS optical observations
  
• 27850 GRB 200524A: Assy continued optical observations
  
• 27849 GRB 200528A: Assy optical upper limit
  
• 27848 GRB 200529A: Enhanced Swift-XRT position
  
• 27847 GRB 200529A: KAIT Optical Afterglow Confirmation
  
• 27846 GRB 200529A: NOT optical afterglow
  
• 27845 GRB 200529A: Swift detection of a burst
  
• 27844 GRB 200529A: Fermi GBM Final Real-time Localization
  
• 27843 Swift GRB200529.04: Global MASTER-Net observations report
  
• 27842 GRB 200528A: NOT optical upper limits
  
• 27841 GRB 200528A: Fermi GBM Observation
  
• 27840 GRB 200528A: Swift/UVOT Upper Limits
  
• 27839 GRB 200528A: Swift-BAT refined analysis
  
• 27838 GRB 200528A: 1.3m DFOT Optical Upper Limits
  
• 27837 GRB 200528A: Nanshan/NEXT optical upper limit
  
• 27836 GRB 200528A: Enhanced Swift-XRT position
  
• 27835 Swift GRB 200528A: Global MASTER-Net observations report
  
• 27834 GRB 200528A: MITSuME Akeno optical upper limits
  
• 27833 GRB 200528A: Potential host galaxy in PanSTARRS, SDSS and WISE
  
• 27832 GRB 200528A: Swift detection of a burst
  
• 27831 GRB 200528A: Fermi GBM Final Real-time Localization
  
• 27830 GRB 200524A: Assy optical observations
  
• 27829 Baksan Neutrino Observatory Alert 200526.85: Global MASTER-Net observations report
  
• 27828 IceCube-200523A: Upper limits from a search for additional neutrino events in IceCube
  
• 27827 GRB 200522A: HST F125W new point source detection
  
• 27826 GRB 200522A: Hubble Space Telescope Near-IR F160W Observations
  
• 27825 GRB200524A: UVOT detection
  
• 27824 GRB 200524A: optical upper limits from further MITSuME Akeno observation
  
• 27823 Fermi GRB 200525A: Global MASTER-Net observations report
  
• 27822 GRB 200522A: Gemini North optical imaging
  
• 27821 GRB 200524A: CrAO optical observations
  
• 27820 GRB 200524A: Kitab observatory afterglow observations
  
• 27819 GRB 200525A: Fermi GBM Final Real-time Localization
  
• 27818 GRB 200524A: AstroSat CZTI detection
  
• 27817 GRB 200524A: Further Liverpool Telescope observations
  
• 27816 Fermi-LAT Gamma-ray Observations of IceCube-190523A
  
• 27815 GRB200521A: ASIM observation
  
• 27814 GRB 200524A: KAIT Optical Observations
  
• 27813 GRB 200524A: MITSuME Akeno optical observation
  
• 27812 GRB 171205A: ATCA observations of late-time radio emission
  
• 27811 GRB 200524A: Swift-XRT afterglow detection
  
• 27810 GRB 200524A: OAJ multicolor afterglow detection
  
• 27809 GRB 200524A: Fermi GBM detection
  
• 27808 GRB 200524: Swift/UVOT observations missed the ZTF20abbiixp position
  
• 27807 GRB 200524A: CAHA multicolor afterglow detection
  
• 27806 GRB 200524A: 1.3m DFOT Optical Observation of ZTF20abbiixp
  
• 27805 GRB 200524A: Liverpool Telescope observations
  
• 27804 GRB 200524A: Correction to the GCN 27800
  
• 27803 GRB 200524A: 3.6m DOT observations of the afterglow candidate ZTF20abbiixp
  
• 27802 GRB 200524A: CrAO observations of ZTF20abbiixp
  
• 27801 Fermi GRB 200524A: Global MASTER-Net observations report
  
• 27800 GRB 200524A: GROWTH-India confirmation of optical afterglow
  
• 27799 ZTF Discovery of ZTF20abbiixp: The Likely Optical Afterglow to GRB 200524A
  
• 27798 GRB 200524A: Swift ToO observations
  
• 27797 GRB 200524A: Fermi-LAT detection
  
• 27796 Konus-Wind detection of short/hard GRB 200521A
  
• 27795 IPN triangulation of GRB 200521A (short)
  
• 27794 GRB 200522A: Correction to GCN 27792
  
• 27793 GRB 200522A: Swift-BAT refined analysis
  
• 27792 GRB 200522A: LCO Optical Afterglow Detection
  
• 27791 IceCube-200523A: Upper limits from Fermi-GBM Observations
  
• 27790 CGBM-SPI-ACS triangulation of short GRB 200521A
  
• 27789 Swift GRB 200522A: Global MASTER-Net observations report
  
• 27788 IceCube Alert 200523.10: Global MASTER-Net observations report
  
• 27787 IceCube-200523A - IceCube observation of a high-energy neutrino candidate event
  
• 27786 GRB 200522A: 6 GHz VLA radio source detection
  
• 27785 GRB 200522A: Swift-XRT refined Analysis
  
• 27784 GRB 200522A: BOOTES-3/YA optical upper limit
  
• 27783 GRB 200522A: Swift/UVOT Upper Limits
  
• 27782 Fermi GRB 200522B: Global MASTER-Net observations report
  
• 27781 GRB 200522B: Fermi GBM Final Real-time Localization
  
• 27780 GRB 200522A: Enhanced Swift-XRT position
  
• 27779 GRB 200522A: Coincident catalogued galaxy at z~0.4
  
• 27778 GRB 200522A: Swift detection of a short burst
  
• 27777 GRB 200521A: CALET Gamma-Ray Burst Monitor detection
  
• 27776 GRB 200521A: AGILE/MCAL and ratemeters detection
  
• 27775 GRB 200517A: Swift-XRT Confirmation of afterglow
  
• 27774 GRB 200514B: Fermi GBM observation
  
• 27773 GRB 200519A: CALET Gamma-Ray Burst Monitor detection
  
• 27772 GRB 200519A: R-band follow-up from HCT
  
• 27771 GRB 200519A: Swift-BAT refined analysis
  
• 27770 GRB 200519A: Insight-HXMT/HE detection
  
• 27769 GRB 200519A: Swift/UVOT Detection
  
• 27768 Fermi trigger No 611676654: Global MASTER-Net observations report
  
• 27767 GRB 200519A: GROWTH-India optical follow-up
  
• 27766 GRB 200519A: AstroSat CZTI detection
  
• 27765 Swift GRB 200519A: Global MASTER-Net observations report
  
• 27764 GRB 200519A: 1.3m DFOT Optical Afterglow Detection
  
• 27763 GRB 200519A: Swift-XRT refined Analysis
  
• 27762 Fermi trigger No 611605955: Global MASTER-Net observations report
  
• 27761 GRB 200519A: Enhanced Swift-XRT position
  
• 27760 GRB 200519A: BOOTES-3/YA optical counterpart observations
  
• 27759 GRB 200519A: LCO Optical Afterglow Detection
  
• 27758 Fermi GBM Sub-Threshold Detection of GRB 200517A
  
• 27757 GRB 200519A: iTelescope optical afterglow detection
  
• 27756 GRB 200519A: Swift detection of a burst with an optical afterglow
  
• 27755 IPN triangulation of GRB 200514B (short)
  
• 27754 GRB 200517A: Swift-XRT afterglow detection
  
• 27753 GRB 200514A: AstroSat CZTI detection
  
• 27752 Fermi trigger No 611434353: Global MASTER-Net observations report
  
• 27751 GRB 200517A: Tiled Swift observations
  
• 27750 GRB 200517A: MAXI/GSC detection
  
• 27749 Swift J1818.0-1607: BOOTES-3/YA optical upper limit
  
• 27748 GRB 200514B: BALROG localization (Fermi Trigger 611140062 / GRB 200514380)
  
• 27747 Swift GRB200516.63: Global MASTER-Net observations report
  
• 27746 Swift Detection of a burst from SGR Swift J1818.0-1607
  
• 27745 GRB 200514B: Zwicky Transient Facility Follow-Up of a Fermi Short GRB (Trigger 611140062) - More Candidates
  
• 27744 GRB 200514A: MITSuME Akeno optical upper limits
  
• 27743 GRB 200514A: CALET Gamma-Ray Burst Monitor detection
  
• 27742 GRB 200512A: Swift-BAT refined analysis
  
• 27741 GRB200514B: YSE detection of ZTF20aazpphd
  
• 27740 Optical transient ZTF20aazpphd is unrelated to GRB 200514B
  
• 27739 GRB 200514B: GROWTH-India follow-up of ZTF20aazpphd (AT2020jww)
  
• 27738 GRB200514B: ATLAS detections of ZTF20aazpphd
  
• 27737 GRB200514B: Zwicky Transient Facility Follow-Up of a Fermi Short GRB (Trigger 611140062)
  
• 27736 GRB 200514B: Fermi GBM Final Real-time Localization
  
• 27735 GRB 200514A: MAXI/GSC detection
  
• 27734 Baksan Neutrino Observatory Alert 200512.: Global MASTER-Net observations report
  
• 27733 GRB 200512A: LCO Optical Upper Limits
  
• 27732 IceCube-200512A: Upper limits from a search for additional neutrino events in IceCube
  
• 27731 Fermi GBM Sub-Threshold Detection of GRB 200512A
  
• 27730 GRB 200512A: Swift/UVOT Upper Limits
  
• 27729 GRB 200512A: Swift-XRT refined Analysis
  
• 27728 GRB 200512A: Enhanced Swift-XRT position
  
• 27727 AGILE detection of a burst from SGR 1935+2154 on May 10, 2020
  
• 27726 GRB 200512A: Swift detection of a burst
  
• 27725 Fermi-LAT Gamma-ray Observations of IceCube-200512A
  
• 27724 SGR 1935+2154: AstroSat CZTI detection
  
• 27723 IceCube-200512A: not observable by Fermi-GBM
  
• 27722 IceCube Alert 200512.31: Global MASTER-Net observations report
  
• 27721 IceCube-200512A: No Candidate Counterparts from the Zwicky Transient Facility
  
• 27720 IceCube-200512A: No counterpart candidates in INTEGRAL SPI-ACS prompt observation
  
• 27719 IceCube-200512A: IceCube observation of a high-energy neutrino candidate event
  
• 27718 Insight-HXMT's continued observation plan for SGR J1935+2154
  
• 27717 Baksan Neutrino Observatory Alert 200511.76: Global MASTER-Net observations report
  
• 27716 GRB 200510A: AstroSat CZTI detection
  
• 27715 Konus-Wind observation of SGR 1935+2154 activity on 2020 May 10
  
• 27714 IPN triangulation of a bright burst from SGR 1935+2154 on 2020-05-10 at 06:12 UT
  
• 27713 GRB 200509A: Swift-BAT refined analysis
  
• 27712 GRB 200510A: BALROG localization (Fermi Trigger 610800081 / GRB 200510445)
  
• 27711 GRB 200510A: Fermi GBM Final Real-time Localization
  
• 27710 GRB 200509A: GROWTH-India r band upper limits
  
• 27709 GRB 200509A: Swift/UVOT Detection
  
• 27708 GRB 200509C: Fermi GBM Final Real-time Localization
  
• 27707 GRB 200509B: Fermi GBM Final Real-time Localization
  
• 27706 Swift GRB 200509A: Global MASTER-Net observations report
  
• 27705 GRB 200509A: LCO Optical Afterglow Detection
  
• 27704 GRB 200509A: Swift-XRT refined Analysis
  
• 27703 GRB 200509A: Enhanced Swift-XRT position
  
• 27702 GRB 200509A: Zadko observatory - Gingin optical upper limits
  
• 27701 GRB 200509A: Swift detection of a burst with a possible optical counterpart
  
• 27700 FRB/X-ray bursts from SGR 1935+2154: No Neutrino Counterpart in ANTARES data
  
• 27699 GRB 200507A: Fermi GBM Final Real-time Localization
  
• 27698 GRB 200506A: AstroSat CZTI detection
  
• 27697 GRB 200506C: AstroSat CZTI detection
  
• 27696 Swift Detection of a burst from SGR Swift J1818.0-1607
  
• 27695 Swift GRB200506.73: Global MASTER-Net observations report
  
• 27694 GRB 200422A: INTEGRAL observations
  
• 27693 GRB 200505A: AGILE detection
  
• 27692 GRB 200506C: Fermi GBM Final Real-time Localization
  
• 27691 GRB 200506B: Fermi GBM Final Real-time Localization
  
• 27690 GRB 200506A: Fermi GBM Final Real-time Localization
  
• 27689 GRB 200505A: Fermi GBM Final Real-time Localization
  
• 27688 Insight-HXMT detection of a short bright burst from SGR 1935+2154
  
• 27687 AGILE detection of a short and hard X-ray burst possibly related to SGR 1935+2154
  
• 27686 GRB 200502A: AstroSat CZTI detection
  
• 27685 GRB 200503A: AGILE observations
  
• 27684 GRB 200502A: AGILE observations
  
• 27683 GRB 200503B: BALROG localization (Fermi Trigger 610219118 / GRB 200503721)
  
• 27682 GRB 200503B: Fermi GBM Final Real-time Localization
  
• 27681 Geocentric time correction for Insight-HXMT detection of the x-ray counterpart of the FRB by CHIME and STARE2 from SGR 1935+2154
  
• 27680 AstroSat CZTI detection : GRB200503A
  
• 27679 Insight-HXMT X-ray and hard X-ray upper limits to the radio burst detected by FAST from SGR 1935+2154
  
• 27678 No optical bursts detected from SGR J1935+2154 by 24 fps observations with Tomo-e Gozen
  
• 27677 GRB 200502A: Fermi GBM Final Real-time Localization
  
• 27676 GRB 200424A: Swift-XRT afterglow detection
  
• 27675 Insight-HXMT X-ray and hard X-ray detection of the double peaks of the Fast Radio Burst from SGR 1935+2154
  
• 27674 Fermi GBM observation of a flare from the magnetar SGR 1806-20
  
• 27673 GRB 200501A: Fermi GBM Final Real-time Localization
  
• 27672 Trigger 968731: Swift detection of SGR1806-20
  
• 27671 Fermi GBM trigger 200429866/609886052 is not a GRB
  
• 27670 SGR 1935+2154: MASTER optical observations
  
• 27669 Konus-Wind observation of hard X-ray counterpart of the radio burst from SGR 1935+2154
  
• 27668 SGR 1935+2154: INTEGRAL hard X-ray counterpart of radio burst
  
• 27667 Konus-Wind observation of a very intense bursting activity of SGR 1935+2154
  
• 27666 Integral GRB200428.61: Global MASTER-Net observations report
  
• 27665 A Forest of Bursts from SGR 1935+2154
  
• 27664 SGR 1935+2154: AstroSat CZTI detections
  
• 27663 high bursting activity of SGR 1935+2154: CGBM observations
  
• 27662 SGR 1935+2154 the Insight-HXMT observation plan
  
• 27661 SGR 1935+2154: MAXI/GSC detection
  
• 27660 Draft-version submission removed.
  
• 27659 Fermi GBM observation of a bright flare from magnetar SGR 1935+2154
  
• 27658 IceCube-200425A: No significant detection in HAWC
  
• 27657 Swift detection of multiple bursts from SGR 1935+2154
  
• 27656 IceCube-200425A: Upper limits from a search for additional neutrino events in IceCube
  
• 27655 IceCube-200425A: Upper limits from Fermi-GBM Observations
  
• 27654 Fermi-LAT Gamma-ray Observations of IceCube-200425A
  
• 27653 Gagarin-day GRB 200412B: observations with the 3.6m Devasthal Optical Telescope
  
• 27652 IceCube-200425A: No counterpart candidates in INTEGRAL SPI-ACS prompt observation
  
• 27651 IceCube-200425A - IceCube observation of a high-energy neutrino candidate event
  
• 27650 GRB 200425A: Swift-BAT refined analysis
  
• 27649 IceCube Alert 200425.98: Global MASTER-Net observations report
  
• 27648 GRB 200424A: Swift/UVOT Upper Limits
  
• 27647 IPN triangulation of GRB 200423A (short)
  
• 27646 GRB 200425A: LCO Optical Upper Limits
  
• 27645 Swift GRB 200425A: Global MASTER-Net observations report
  
• 27644 GRB 200425B: Fermi GBM Final Real-time Localization
  
• 27643 GRB 200425A: Swift/UVOT Upper Limits
  
• 27642 GRB 200424A: AstroSat CZTI detection
  
• 27641 GRB 200425A: Swift-XRT refined Analysis
  
• 27640 GRB 200424A: Swift-XRT observations
  
• 27639 GRB 200425A: Enhanced Swift-XRT position
  
• 27638 GRB 200425A: Swift detection of a burst
  
• 27637 GRB 200424A: LCO Optical Upper Limit
  
• 27636 GRB 200424A: Swift ToO observations
  
• 27635 Konus-Wind observation of GRB 200422A
  
• 27634 GRB 200424A: a long GRB detected by INTEGRAL
  
• 27633 Fermi GRB 200423A: Global MASTER-Net observations report
  
• 27632 GRB 200423A: Fermi GBM Final Real-time Localization
  
• 27631 Konus-Wind observation of a bright burst from SGR 1935+2154
  
• 27630 GRB 200422A: AstroSat CZTI detection
  
• 27629 GRB 200415A correction to GCN 27627 (possible magnetar Giant Flare in Sculptor Galaxy): INTEGRAL observations
  
• 27628 GRB 200422A: MASTER optical observations
  
• 27627 GRB 200415A (possible magnetar Giant Flare in Sculptor Galaxy): INTEGRAL observations
  
• 27626 IPN triangulation of GRB 200422A (long/very bright)
  
• 27625 IPN Triangulation of a bright burst from SGR 1935+2154
  
• 27624 IceCube-200421A: Upper limits from a search for additional neutrino events in IceCube
  
• 27623 bright SGR burst detected by CALET Gamma-Ray Burst Monitor
  
• 27622 GRB 200415A: ASIM observation
  
• 27621 GRB 200410A: Liverpool Telescope First Hour Observations
  
• 27620 Fermi-LAT Gamma-ray Observations of IceCube-200421A
  
• 27619 IceCube-200421A: No Neutrino Counterpart in ANTARES data
  
• 27618 Fermi GRB 200421A: Global MASTER-Net observations report
  
• 27617 IceCube-200421A: No significant detection in HAWC
  
• 27616 GRB 200421A: Fermi GBM Final Real-time Localization
  
• 27615 IceCube-200421A: not observable by Fermi-GBM
  
• 27614 IceCube Alert 200421.02: Global MASTER-Net observations report
  
• 27613 IceCube-200421A: No counterpart candidates in INTEGRAL SPI-ACS and IBIS prompt observation
  
• 27612 IceCube-200421A - IceCube observation of a high-energy neutrino candidate event
  
• 27611 IceCube Alert 200420.97: Global MASTER-Net observations report
  
• 27610 GRB 200412B: continued Mondy and Terskol optical observations
  
• 27609 GRB 200420: Fermi GBM Final Localization Correction
  
• 27608 Fermi GRB 200420A: Global MASTER-Net observations report
  
• 27607 GRB 200420A: Fermi GBM Final Real-time Localization
  
• 27606 Fermi trigger No 608935505: Global MASTER-Net observations report
  
• 27605 GRB 200412B: continued Terskol optical observations
  
• 27604 GRB 200412B: continued AbAO, Mondy, TSHAO, Terskol optical observations
  
• 27603 GRB 200410A: Optical upper limit
  
• 27602 GRB 200416A: Swift/UVOT Detection
  
• 27601 GRB 200416A: Swift-BAT refined analysis
  
• 27600 GRB 200412B: Swift XRT confirmation of afterglow and UVOT upper limits
  
• 27599 GRB 200415A: MASTER imspection and possible localisation
  
• 27598 GRB200412B: GROWTH India detection of afterglow
  
• 27597 GRB 200415A: Fermi-LAT localization update
  
• 27596 Konus-Wind observation of GRB 200415A (a magnetar Giant Flare in Sculptor Galaxy?)
  
• 27595 Improved IPN error box for GRB 200415A (consistent with the Sculptor Galaxy)
  
• 27594 GRB 200416A: Swift-XRT refined Analysis
  
• 27593 GRB 200412B: continued Tautenburg observations
  
• 27592 GRB 200416A: Fermi GBM observation
  
• 27591 GRB 200416A: Swift detection of a burst with an optical afterglow
  
• 27590 Fermi GRB 200415A: Global MASTER-Net observations report
  
• 27589 GRB 200411A: Chandra observations indicative of temporal steepening
  
• 27588 GRB 200412A : AstroSat CZTI detection
  
• 27587 GRB 200415A: Fermi GBM observation
  
• 27586 GRB 200415A: Fermi-LAT detection
  
• 27585 IPN triangulation of GRB 200415A (possible Magnetar Giant Flare in Sculptor Galaxy?)
  
• 27584 GRB 200410A: CALET Gamma-Ray Burst Monitor detection
  
• 27583 GRB 200412B: Mondy optical observations
  
• 27582 GRB 200412B: continued Tautenburg observations
  
• 27581 Konus-Wind observation of GRB 200412B
  
• 27580 GRB 200415A: BALROG localization (Fermi Trigger 608633290 / GRB 200415367)
  
• 27579 GRB 200415A: Fermi GBM Final Real-time Localization
  
• 27578 GRB 200410A: Swift-BAT refined analysis
  
• 27577 Konus-Wind observation of GRB 200412A
  
• 27576 GRB 200412B: MITSuME Akeno optical observation
  
• 27575 GRB 200412B: Tautenburg observations
  
• 27574 GRB 200412B: contunued AbAO optical observations
  
• 27573 GRB 200411A: ATCA 5/9 GHz radio observations
  
• 27572 GRB 200412B: CALET Gamma-Ray Burst Monitor detection
  
• 27571 GRB 200412B: Xinglong TNT optical observations
  
• 27570 GRB 200412B: SAO RAS observations of OT
  
• 27569 IceCube-200410A: No significant detection in HAWC
  
• 27568 GRB 200405B: Further Swift-XRT observations
  
• 27567 GRB 200412B: Tautenburg observations
  
• 27566 GRB 200412B: AbAO optical observations
  
• 27565 GRB 200412B: Insight-HXMT/HE detection
  
• 27564 GRB 200412B: Optical afterglow detection with 1.3m DFOT
  
• 27563 GRB 200412B : AstroSat CZTI detection
  
• 27562 IceCube-200410A : Upper limits from Insight-HXMT/HE observations
  
• 27561 GRB 200412B: Swift-XRT afterglow detection
  
• 27560 IPN triangulation of GRB 200412A
  
• 27559 Fermi GRB 200412A: Global MASTER-Net observations report
  
• 27558 GRB 200412B: Fermi GBM detection
  
• 27557 GRB 200412B: Fermi-LAT detection
  
• 27556 GRB 200412B: MASTER-Amur Optical Couterpart in Gagarin day!
  
• 27555 GRB 200412B: MASTER Optical Couterpart in Gagarin day!
  
• 27554 Konus-Wind observation of a bright burst from SGR 1935+2154
  
• 27553 Correction to GCN 27551 - Swift is observing GRB 200412*B*
  
• 27552 IceCube-200410A: Upper limits from a search for additional neutrino events in IceCube
  
• 27551 GRB 200412B: Tiled Swift observations
  
• 27550 GRB 200412A: Fermi GBM detection
  
• 27549 Fermi GRB 200412B: Global MASTER-Net observations report
  
• 27548 GRB 200412B: BALROG localization (Fermi Trigger 608375325 / GRB 200412381)
  
• 27547 GRB 200412B: Fermi GBM Final Real-time Localization
  
• 27546 GRB 200412A: BALROG localization (Fermi Trigger 608367436 / GRB 200412290)
  
• 27545 GRB 200411A: Swift-BAT refined analysis
  
• 27544 Fermi-LAT Gamma-ray Observations of IceCube-200410A
  
• 27543 GRB 200411A: Fermi GBM observation
  
• 27542 Swift GRB 200411A: Global MASTER-Net observations report
  
• 27541 IceCube-200410A: Upper limits from Fermi-GBM Observations
  
• 27540 GRB 200411A: Swift-XRT refined Analysis
  
• 27539 GRB 200411A: Swift/UVOT Upper Limits
  
• 27538 GRB 200411A: Enhanced Swift-XRT position
  
• 27537 IceCube-200410A: Possible associated excess in INTEGRAL SPI-ACS prompt observation
  
• 27536 GRB 200411A: Swift detection of a short burst
  
• 27535 GRB 200411A: Fermi GBM Final Real-time Localization
  
• 27534 IceCube-200410A - IceCube observation of a high-energy neutrino candidate event
  
• 27533 IceCube Alert 200410.97: Global MASTER-Net observations report
  
• 27532 GRB 200410A: Swift/UVOT Detection
  
• 27531 SGR 1935+2154: Fermi GBM observation
  
• 27530 Baksan Neutrino Observatory Alert 200410.82: Global MASTER-Net observations report
  
• 27529 Fermi trigger No 608204639: Global MASTER-Net observations report
  
• 27528 Baksan Neutrino Observatory Alert 200409.81: Global MASTER-Net observations report
  
• 27527 IPN Triangulation of a bright burst from SGR 1935+2154
  
• 27526 LIGO/Virgo S200225q: Swift XRT observations, 1 X-ray sources
  
• 27525 Konus-Wind observation of GRB 200327A
  
• 27524 LIGO/Virgo S200224ca: Swift XRT observations, 8 X-ray sources
  
• 27523 GRB 200410A: Swift-XRT refined Analysis
  
• 27522 GRB 200410A: Enhanced Swift-XRT position
  
• 27521 GRB 200409A: No detection of radio emission 5 hours post-burst
  
• 27520 GRB 200410A: Ondrejov D50 afterglow confirmation
  
• 27519 GRB 200409A: Swift-BAT refined analysis
  
• 27518 GRB 200410A: Swift detection of a burst with a possible optical counterpart
  
• 27517 Swift GRB200410.10: Global MASTER-Net observations report
  
• 27516 GRB 200405B: ATCA follow-up and ASKAP limits on pre-burst radio emission
  
• 27515 Baksan Neutrino Observatory Alert 200408.26: Global MASTER-Net observations report
  
• 27514 Fermi GBM Sub-Threshold Detection of GRB 200409A
  
• 27513 Baksan Neutrino Observatory Alert 200409.23: Global MASTER-Net observations report
  
• 27512 Swift GRB 200409A: Global MASTER-Net observations report
  
• 27511 GRB 200409A: Swift-XRT refined Analysis
  
• 27510 GRB 200409A: Enhanced Swift-XRT position
  
• 27509 GRB 200409A: Swift detection of a burst with an optical counterpart
  
• 27508 Fermi GRB 200407A: Global MASTER-Net observations report
  
• 27507 Fermi GRB 200407B: Global MASTER-Net observations report
  
• 27506 IPN triangulation of GRB 200407A (short)
  
• 27505 IPN triangulation of GRB 200405B (short)
  
• 27504 Baksan Neutrino Observatory Alert 200406.3: Global MASTER-Net observations report
  
• 27503 GRB 200407B: Fermi GBM Final Real-time Localization
  
• 27502 GRB 200407A: Fermi GBM Final Real-time Localization
  
• 27501 GRB 200405B: LCO Optical Upper Limits
  
• 27500 GRB 200405B: Swift-XRT observations
  
• 27499 GRB 200405B: Swift ToO observations
  
• 27498 Fermi GRB 200405A: Global MASTER-Net observations report
  
• 27497 GRB 200405B: Swift/BAT-GUANO detection and *possible* arcminute localization of a short GRB
  
• 27496 GRB 200405A: Fermi GBM Final Real-time Localization
  
• 27495 GRB 200404A: Fermi GBM Final Localization
  
• 27494 Fermi GRB 200403C: Global MASTER-Net observations report
  
• 27493 GRB 200404A: BALROG localization (Fermi Trigger 607712227 / GRB 200404706)
  
• 27492 GRB 200403A: AstroSat CZTI detection
  
• 27491 Fermi GRB 200403B: Global MASTER-Net observations report
  
• 27490 Fermi GRB 200403A: Global MASTER-Net observations report
  
• 27489 GRB 200403C: Fermi GBM Final Real-time Localization
  
• 27488 LIGO/Virgo S200316bj: Upper limits from Konus-Wind observations
  
• 27487 LIGO/Virgo S200311bg: Upper limits from Konus-Wind observations
  
• 27486 LIGO/Virgo S200302c: Upper limits from Konus-Wind observations
  
• 27485 LIGO/Virgo S200225q: Upper limits from Konus-Wind observations
  
• 27484 GRB 200403B: Fermi GBM Final Real-time Localization
  
• 27483 LIGO/Virgo S200224ca: Upper limits from Konus-Wind observations
  
• 27482 GRB 200403A: Fermi GBM Final Real-time Localization
  
• 27481 GRB 200325B: Mondy continued observations
  
• 27480 Fermi GRB 200402C: Global MASTER-Net observations report
  
• 27479 GRB 200402C: Fermi GBM Final Localization
  
• 27478 GRB 200402B: Fermi GBM Final Localization
  
• 27477 Fermi trigger No 607537834: Global MASTER-Net observations report
  
• 27476 GRB 200402B: BALROG localization (Fermi Trigger 607537834 / GRB 200402688)
  
• 27475 Fermi GRB 200402A: Global MASTER-Net observations report
  
• 27474 GRB 200402A: BALROG localization (Fermi Trigger 607513182 / GRB 200402403)
  
• 27473 GRB 200325B: Optical upper limit
  
• 27472 GRB 200402A: Fermi GBM Final Real-time Localization
  
• 27471 GRB 200325B: further Swift-XRT observations
  
• 27470 Fermi GRB 200401A: Global MASTER-Net observations report
  
• 27469 GRB 200401A: Fermi GBM Final Real-time Localization
  
• 27468 GRB 200325B: Mondy continued observations
  
• 27467 GRB 200325B: Mondy continued observations
  
• 27466 GRB 200327A: Fermi GBM detection
  
• 27465 GRB 200325B: Mondy continued observations
  
• 27464 GRB 200325B: Tautenburg observations
  
• 27463 IPN triangulation of GRB 200327A (short)
  
• 27462 GRB 200326B: AstroSat CZTI detection
  
• 27461 GRB 200327A: AGILE/MCAL observations
  
• 27460 GRB 200325B: Fermi GBM observation
  
• 27459 Fermi trigger No 607035413: Global MASTER-Net observations report
  
• 27458 GRB 200327A: Fermi GBM Final Real-time Localization
  
• 27457 GRB 200325B: Swift-XRT and UVOT observations
  
• 27456 GRB 200325B: LCO Optical Detection
  
• 27455 GRB 200325B: Mondy, CrAO, AbAO afterglow confirmation and refined photometry of MASTER OT J111012.51+274912.8
  
• 27454 GRB 200326B: AstroSat LAXPC detection
  
• 27453 GRB 200325A: Fermi GBM observation
  
• 27452 GRB 200325B: Mondy and CrAO observations, Master MASTER OT J111012.51+274912.8 confirmation
  
• 27451 Fermi trigger No 606918292: Global MASTER-Net observations report
  
• 27450 GRB 200325B: Swift ToO observations
  
• 27449 IPN triangulation of GRB 200325A (short)
  
• 27448 Fermi trigger No 606799116: Global MASTER-Net observations report
  
• 27447 GRB 200326A: Fermi GBM Final Real-time Localization
  
• 27446 GRB 200325B: MASTERt OT detection
  
• 27445 GRB 200324A: AROMA-N Optical Observation
  
• 27444 GRB 200325A: Swift/BAT detection and probable arcminute localization of a short GRB from GUANO
  
• 27443 GRB 200324A, Swift-BAT refined analysis
  
• 27442 Fermi trigger No 606840801: Global MASTER-Net observations report
  
• 27441 GRB 200325B: Fermi GBM Final Real-time Localization
  
• 27440 GRB 200324A:: TSHAO optical upper limit
  
• 27439 GRB 200324A: Swift/UVOT Upper Limits
  
• 27438 GRB 200325A: AstroSat CZTI detection
  
• 27437 GRB 200325A: AGILE/MCAL observations
  
• 27436 GRB 200324A: LCO Optical Upper Limit
  
• 27435 GRB 200324A: Swift-XRT refined Analysis
  
• 27434 GRB 200325A: Fermi GBM Final Real-time Localization
  
• 27433 GRB 200324A: Konkoly Obs. optical upper limit
  
• 27432 GRB 200324A: NOT optical upper limit
  
• 27431 GRB 200324A: Tautenburg observations
  
• 27430 GRB 200324A: Enhanced Swift-XRT position
  
• 27429 GRB 200324A:MITSuME Akeno optical upper limits
  
• 27428 GRB 200324A: Swift detection of a burst
  
• 27427 Swift GRB200324.69: Global MASTER-Net observations report
  
• 27426 GRB 200318A : AstroSat CZTI detection
  
• 27425 GRB 200317A: AstroSat CZTI detection
  
• 27424 Fermi trigger No 606681997: Global MASTER-Net observations report
  
• 27423 GRB 200323A: Fermi GBM detection
  
• 27422 GRB 200323A: Fermi GBM Final Real-time Localization
  
• 27421 LIGO/Virgo S200316bj: no counterpart candidate in SVOM/GWAC-F30 observations
  
• 27420 Fermi trigger No 606614927: Global MASTER-Net observations report
  
• 27419 LIGO/Virgo S200316bj: Updated Sky Localization and EM Bright Classification
  
• 27418 GRB 200320B: MAXI/GSC detection
  
• 27417 GRB 200320A: Fermi GBM Final Localization
  
• 27416 GRB 200319A: BALROG localization (Fermi Trigger 606296685 / GRB 200319323)
  
• 27415 GRB 200319A: Fermi GBM Final Real-time Localization
  
• 27414 Chandra observations of GW170817 at 2.5 years since merger (All epochs 4 of 4)
  
• 27413 Fermi trigger No 606263732: Global MASTER-Net observations report
  
• 27412 GRB 200318A: Fermi GBM Final Real-time Localization
  
• 27411 GW170817: Continued X-ray emission detected with Chandra at 940 days post-merger
  
• 27410 Duplicate submission removed.
  
• 27409 LIGO/Virgo S200316bj : No significant candidates in TAROT - FRAM - GRANDMA observations.
  
• 27408 LIGO/Virgo S200316bj: Upper limits from Insight-HXMT/HE observations
  
• 27407 Konus-Wind observation of GRB 200313B
  
• 27406 LIGO/Virgo S200316bj: no counterpart candidate in SVOM/GWAC observations
  
• 27405 LIGO/Virgo S200316bj: Upper limits from CALET observations
  
• 27404 LIGO/Virgo S200316bj: No neutrino candidates at Pierre Auger Observatory
  
• 27403 LIGO/Virgo S200316bj: No counterpart candidates in Fermi-LAT observations
  
• 27402 LIGO/Virgo S200316bj: No Counterparts in DDOTI/OAN Optical Observations
  
• 27401 LIGO/Virgo S200316bj: no counterpart candidates in the Swift/BAT observations
  
• 27400 LIGO/Virgo S200213t: Continued Swift UVOT and XRT observations of ZTF20aamvmzj (AT2020cja)
  
• 27399 Konus-Wind observation of GRB 200313A
  
• 27398 Konus-Wind observation of GRB 200311A
  
• 27397 LIGO/Virgo S200316bj: No counterpart candidates in INTEGRAL SPI-ACS, and IBIS prompt observation
  
• 27396 LIGO/Virgo S200316bj: upper limits from AGILE/GRID observations
  
• 27395 LIGO/Virgo S200316bj: upper limits from AGILE/MCAL observations
  
• 27394 LIGO/Virgo S200316bj: Upper limits from Fermi-GBM Observations
  
• 27393 Fermi trigger No 606098435: Global MASTER-Net observations report
  
• 27392 GRB 200317A: Fermi GBM Final Real-time Localization
  
• 27391 LIGO/Virgo S200316bj: Coverage and upper limits from MAXI/GSC observations
  
• 27390 LIGO/Virgo S200316bj : no neutrino counterpart candidate in ANTARES search
  
• 27389 LIGO/Virgo S200316bj: Upper limits from IceCube neutrino searches
  
• 27388 LIGO/Virgo S200316bj: Identification of a GW compact binary merger candidate
  
• 27387 LIGO/Virgo S200316bj: Global MASTER-Net observations report
  
• 27386 IPN triangulation of GRB 200313B (short)
  
• 27385 IPN triangulation of GRB 200313A
  
• 27384 SGR Swift J1818.0-1607: Swift-BAT refined analysis
  
• 27383 GRB 200313A: Fermi GBM detection
  
• 27382 LIGO/Virgo S200311bg: Updated Sky Localization and EM Bright Classification
  
• 27381 IPN triangulation of GRB 200311A
  
• 27380 Fermi trigger No 605789837: Global MASTER-Net observations report
  
• 27379 GRB 200313B: Fermi GBM Final Real-time Localization
  
• 27378 SGR Swift J1818.0-1607: BOOTES-4/MET optical limit
  
• 27377 GRB 200313A: BALROG localization (Fermi Trigger 605756501 / GRB 200313071)
  
• 27376 Fermi trigger No 605756501: Global MASTER-Net observations report
  
• 27375 Swift GRB200312.89: Global MASTER-Net observations report
  
• 27374 GRB 200313A: Fermi GBM Final Real-time Localization
  
• 27373 Swift-BAT trigger 960986: Swift detection of a new SGR Swift J1818.0-1607
  
• 27372 LIGO/Virgo S200311bg: Not observable by CALET
  
• 27371 GRB 200311A: AstroSat CZTI detection
  
• 27370 Fermi trigger No 605632577: Global MASTER-Net observations report
  
• 27369 LIGO/Virgo S200311bg: Swift/BAT in the South Atlantic Anomaly
  
• 27368 LIGO/Virgo S200311bg: No significant counterpart candidates in Fermi-LAT observations
  
• 27367 IPN triangulation of GRB 200307A (short)
  
• 27366 LIGO/Virgo S200224ca: DESGW Summary of DECam Observations
  
• 27365 GRB 200311A: AGILE/MCAL and scientific ratemeters observations
  
• 27364 LIGO/Virgo S200311bg: not observable by Fermi GBM
  
• 27363 GRB 200311A: Fermi GBM Final Real-time Localization
  
• 27362 LIGO/Virgo S200311bg: Coverage and upper limits from MAXI/GSC observations
  
• 27361 LIGO/Virgo S200311bg: not observable by AGILE at the event time
  
• 27360 LIGO/Virgo S200311bg: No counterpart candidates in INTEGRAL SPI-ACS,prompt observation
  
• 27359 LIGO/Virgo S200311bg: Upper limits from IceCube neutrino searches
  
• 27358 LIGO/Virgo S200311bg: Identification of a GW compact binary merger candidate
  
• 27357 Chandra observations of GW170817 /Home/xtelab/bacodine 2.5 years since merger (epoch 1 of 4)
  
• 27356 GRB 200307A: Updated localization from Fermi/GBM and Swift/BAT-GUANO
  
• 27355 GRB 200310A: MAXI/GSC detection
  
• 27354 GRB 200306C: ALMA 3mm upper limit
  
• 27353 GRB 200306C: Swift-BAT refined analysis
  
• 27352 GRB 200306C: Swift/UVOT Detection
  
• 27351 GRB 200306A: Swift/UVOT Upper Limits
  
• 27350 GRB 200308A: Fermi GBM Final Real-time Localization
  
• 27349 Fermi trigger No 605309224: Global MASTER-Net observations report
  
• 27348 GRB 200306C: Calar Alto 2.2m upper limit
  
• 27347 LIGO/Virgo S200308e: Retraction of GW compact binary merger candidate
  
• 27346 GRB 200306A: Swift-BAT refined analysis
  
• 27345 GRB 200306C: Swift-XRT refined Analysis
  
• 27344 GRB 200307A: Fermi GBM Final Real-time Localization
  
• 27343 GRB 200306A: RATIR Optical Observations
  
• 27342 GRB 200306C: Enhanced Swift-XRT position
  
• 27341 GRB 200306C: VIRT optical upper limits
  
• 27340 GRB 200306A: AstroSat CZTI detection
  
• 27339 GRB 200306C: KCT upper limit of the optical afterglow
  
• 27338 GRB200306C: First Hour Liverpool Telescope Observations
  
• 27337 GRB 200306C: LCO Optical Upper Limits
  
• 27336 GRB 200306B: Fermi GBM Final Localization Correction
  
• 27335 GRB 200306C: OSN 1.5m afterglow detection
  
• 27334 GRB 200306C: Liverpool Telescope observations
  
• 27333 GRB 200306C: SAO RAS observations of OT
  
• 27332 GRB 200306C: GOTO upper limits
  
• 27331 GRB 200306A: Swift-XRT refined Analysis
  
• 27330 LIGO/Virgo S200302c: No notable candidates in GOTO imaging
  
• 27329 GRB 200306C: BOOTES-1 detection of the optical afterglow
  
• 27328 GRB 200306C: FRAM-ORM afterglow detection
  
• 27327 Swift GRB200306.95: Global MASTER-Net observations report
  
• 27326 GRB 200306C: Swift detection of a burst with an optical counterpart
  
• 27325 Swift GRB200306.95: Global MASTER-Net OT detection
  
• 27324 Swift GRB200306.95: Global MASTER-Net OT detection
  
• 27323 GRB 200306B: Fermi GBM Final Real-time Localization
  
• 27322 LIGO/Virgo S200302c : No significant candidates in FRAM - TAROT - GRANDMA observations.
  
• 27321 GRB 200306A: Potential LCO Optical Afterglow Detection
  
• 27320 GRB 200306A: Swift detection of a burst
  
• 27319 Swift GRB200306.01: Global MASTER-Net observations report
  
• 27318 GRB 200228B: continued optical observations
  
• 27317 LIGO/Virgo S200225q: No notable candidates in GOTO imaging
  
• 27316 Konus-Wind observation of GRB200303A
  
• 27315 LIGO/Virgo S200302c: AstroSat CZTI upper limits
  
• 27314 GRB 200303A: Fermi GBM observation
  
• 27313 GRB200210A AstroSat observations
  
• 27312 GRB 200303A: Swift-XRT refined Analysis
  
• 27311 GRB 200303A: Swift-BAT refined analysis
  
• 27310 LIGO/Virgo S200302c: Upper limits from Insight-HXMT/HE observations
  
• 27309 GRB 200303A: NOT optical observations
  
• 27308 GRB 200303A: Swift/UVOT Upper Limits
  
• 27307 GRB 200303A: FRAM-ORM optical limit
  
• 27306 LIGO/Virgo S200303ba: Retraction of GW compact binary merger candidate
  
• 27305 GRB 200219A: AstroSat CZTI detection
  
• 27304 GRB 200303A: GOTO observations upper limit
  
• 27303 GRB 200303A: Optical limit from CAHA
  
• 27302 GRB 200228A: AstroSat CZTI detection
  
• 27301 GRB 200303A: CALET Gamma-Ray Burst Monitor detection
  
• 27300 GRB 200303A: Enhanced Swift-XRT position
  
• 27299 LIGO/Virgo S200302c: No transient candidates in CALET observations
  
• 27298 GRB 200219C: VLA Detection
  
• 27297 GRB 200303A: Swift detection of a burst
  
• 27296 Swift GRB200303.11: Global MASTER-Net observations report
  
• 27295 Fermi trigger No 604895668: Global MASTER-Net observations report
  
• 27294 GRB 200303A: Fermi GBM Final Real-time Localization
  
• 27293 LIGO/Virgo S200224ca: No counterpart candidates in TOROS observations
  
• 27292 LIGO/Virgo S200302c: Updated Sky Localization
  
• 27291 LIGO/Virgo S200302c: No significant counterpart candidates in Fermi-LAT observations
  
• 27290 LIGO/Virgo S200302c: No counterpart candidates in KAIT observations
  
• 27289 LIGO/Virgo S200302c: no counterpart candidates in the Swift/BAT observations
  
• 27288 LIGO/Virgo S200224ca: Transient found in Swift/UVOT counterpart search
  
• 27287 LIGO/Virgo S200302c: No counterpart candidates in HAWC observations
  
• 27286 LIGO/Virgo S200302c: Upper limits from Fermi-GBM Observations
  
• 27285 LIGO/Virgo S200302c: No counterpart candidates in INTEGRAL SPI-ACS and IBIS prompt observation
  
• 27284 LIGO/Virgo S200302c : no neutrino counterpart candidate in ANTARES search
  
• 27283 LIGO/Virgo S200302c: upper limits from AGILE/MCAL observations
  
• 27282 LIGO/Virgo S200225q: AstroSat CZTI upper limits
  
• 27281 LIGO/Virgo S200219ac: AstroSat CZTI upper limits
  
• 27280 LIGO/Virgo S200302c: Coverage and upper limits from MAXI/GSC observations
  
• 27279 LIGO/Virgo S200302c: Upper limits from IceCube neutrino searches
  
• 27278 LIGO/Virgo S200302c: Identification of a GW compact binary merger candidate
  
• 27277 LIGO/Virgo S200302c: Global MASTER-Net observations report
  
• 27276 GRB 200228B: Mondy, TSHAO, AbAO and CrAO optical observations, afterglow candidate
  
• 27275 LIGO/Virgo S200225q : No significant candidates in TAROT - FRAM - GRANDMA observations.
  
• 27274 GRB 200228B: LCO Optical Upper Limit
  
• 27273 GRB 200228B: Swift-BAT refined analysis
  
• 27272 GRB 200228B: RATIR Optical Observations
  
• 27271 GRB 200228B: Liverpool Telescope imaging
  
• 27270 GRB 200228B: Swift-XRT refined Analysis
  
• 27269 Swift GRB 200228B: Global MASTER-Net observations report
  
• 27268 GRB 200228B: Swift/UVOT Upper Limits
  
• 27267 GRB 200228B: RATIR Optical Observations
  
• 27266 GRB 200228B: Fermi GBM observation
  
• 27265 GRB 200227A: RATIR Optical Observations
  
• 27264 IceCube-200227A: Upper limits from a search for additional neutrino events in IceCube
  
• 27263 GRB 200228B: KAIT Optical Upper Limit
  
• 27262 LIGO/Virgo S200224ca: Updated Sky Localization and EM Bright Classification
  
• 27261 GRB 200228C: Insight-HXMT/HE detection
  
• 27260 GRB 200228A: Fermi GBM observation
  
• 27259 GRB 200228A: Swift/BAT detection and arcminute localization from GUANO
  
• 27258 SUBJECT : LIGO/Virgo S200213t: No significant EM counterparts identified from continued GECKO observation of host galaxy candidates
  
• 27257 GRB 200227A: Mondy optical upper limit
  
• 27256 GRB 200228B: Enhanced Swift-XRT position
  
• 27255 Fermi-LAT Gamma-ray Observations of IceCube-200227A
  
• 27254 GRB 200228B: Swift detection of a burst
  
• 27253 GRB 200228B: Fermi GBM Final Real-time Localization
  
• 27252 Fermi trigger No 604565918: Global MASTER-Net observations report
  
• 27251 GRB 200227A: Insight-HXMT/HE detection
  
• 27250 IceCube-200227A : Upper limits from Insight-HXMT/HE observations
  
• 27249 GRB 200227A: Swift-XRT refined Analysis
  
• 27248 GRB 200228A: BALROG localization (Fermi Trigger 604565918 / GRB 200228291)
  
• 27247 GRB 200228A: Fermi GBM Final Real-time Localization
  
• 27246 GRB 200227A: Swift-BAT refined analysis
  
• 27245 GRB 200219A: ATCA 5/9 GHz radio observations
  
• 27244 GRB 200227A: Swift/UVOT Upper Limits
  
• 27243 GRB 200227A: Enhanced Swift-XRT position
  
• 27242 HAWC-200216A: No Neutrino Counterpart in ANTARES Search
  
• 27241 IceCube-200227A: Upper limits from Fermi-GBM Observations
  
• 27240 GRB 200224A: Mondy optical upper limit
  
• 27239 GRB 200227A: Fermi GBM observation
  
• 27238 LIGO/Virgo S200224ca : No significant candidates in TAROT - FRAM - GRANDMA observations
  
• 27237 IceCube-200227A: No counterpart candidates in INTEGRAL SPI-ACS and IBIS prompt observation
  
• 27236 GRB 200227A: MITSuME Akeno optical upper limit
  
• 27235 IceCube-200227A: IceCube observation of a high-energy neutrino candidate event
  
• 27234 GRB 200227A: Swift detection of a burst
  
• 27233 GRB 200227A: Fermi GBM Final Real-time Localization
  
• 27232 LIGO/Virgo S200225q: Not observable by CALET
  
• 27231 LIGO/Virgo S200224ca: Upper limits from CALET observations.
  
• 27230 LIGO/Virgo S200224car: GRAWITA VST-ESO PARANAL observations.
  
• 27229 LIGO/Virgo S200225q: Updated Sky Localization
  
• 27228 Konus-Wind observation of GRB 200219C
  
• 27227 LIGO/Virgo S200224ca: DESGW Optical counterpart candidates from DECam
  
• 27226 Konus-Wind observation of GRB 200219A
  
• 27225 LIGO/Virgo S200219ac: Upper limits from Konus-Wind observations
  
• 27224 LIGO/Virgo S200213t: Upper limits from Konus-Wind observations
  
• 27223 LIGO/Virgo S200208q: Upper limits from Konus-Wind observations
  
• 27222 GRB 200224A: Calar Alto 2.2m optical afterglow detection
  
• 27221 LIGO/Virgo S200225q: no counterpart candidate in SVOM/GWAC observations
  
• 27220 LIGO/Virgo S200225q: Upper limits from Insight-HXMT/HE observations
  
• 27219 LIGO/Virgo S200224ca: Upper limits from Insight-HXMT/HE observations
  
• 27218 GRB 200219A: Chandra rapid ToO upper limit
  
• 27217 LIGO/Virgo S200225q: no counterpart candidates in the Swift/BAT observations
  
• 27216 LIGO/Virgo S200224ca: no counterpart candidates in the Swift/BAT observations
  
• 27215 GRB 200224B: DDOTI/OAN optical observations report
  
• 27214 LIGO/Virgo S200219ac: Updated Sky Localization
  
• 27213 LIGO/Virgo S200224ca: No counterpart candidates in KAIT observations
  
• 27212 LIGO/Virgo S200224ca: No Counterparts in DDOTI/OAN Optical Observations
  
• 27211 LIGO/Virgo S200224ca: GRAWITA-Campo Imperatore observations.
  
• 27210 IPN triangulation of GRB 200221A (short)
  
• 27209 LIGO/Virgo S200225q: Upper limits from Fermi-GBM Observations
  
• 27208 Fermi trigger No 604231129: Global MASTER-Net observations report
  
• 27207 LIGO/Virgo S200225q: No counterpart candidates in Fermi-LAT observations
  
• 27206 LIGO/Virgo S200225q: upper limits from AGILE/GRID observations
  
• 27205 LIGO/Virgo S200224ca: Subaru/Hyper Suprime-Cam follow-up observations
  
• 27204 LIGO/Virgo S200225q: upper limits from AGILE/MCAL observations
  
• 27203 LIGO/Virgo S200225q: Upper limits from IceCube neutrino searches
  
• 27202 LIGO/Virgo S200225q: No counterpart candidates in HAWC observations
  
• 27201 LIGO/Virgo S200225q : no neutrino counterpart candidate in ANTARES search
  
• 27200 LIGO/Virgo S200225q: Global MASTER-Net observations report
  
• 27199 LIGO/Virgo S200224ca: No counterpart candidates in Fermi-LAT observations
  
• 27198 LIGO/Virgo S200225q: No counterpart candidates in INTEGRAL SPI-ACS and IBIS prompt observation
  
• 27197 LIGO/Virgo S200225q: Coverage and upper limits from MAXI/GSC observations
  
• 27196 LIGO/Virgo S200219ac: No counterpart candidates from Nanshan/NEXT observations
  
• 27195 LIGO/Virgo S200224ca: upper limits from AGILE/GRID observations
  
• 27194 GRB 200224A: Swift-BAT refined analysis
  
• 27193 LIGO/Virgo S200225q: Identification of a GW compact binary merger candidate The LIGO Scientific Collaboration and the Virgo Collaboration
  
• 27192 LIGO/Virgo S200224ca: not observable by Fermi-GBM
  
• 27191 GRB 200224A: LCO Upper Limits
  
• 27190 LIGO/Virgo S200224ca: No counterpart candidates in INTEGRAL SPI-ACS prompt observation
  
• 27189 GRB 200224A: RATIR Optical Observations and Confirmation of the Afterglow
  
• 27188 LIGO/Virgo S200224ca: Coverage and upper limits from MAXI/GSC observations
  
• 27187 LIGO/Virgo S200224ca: upper limits from AGILE/MCAL observations
  
• 27186 LIGO/Virgo S200224ca: Global MASTER-Net observations report
  
• 27185 LIGO/Virgo S200224ca: Upper limits from IceCube neutrino searches
  
• 27184 LIGO/Virgo S200224ca: Identification of a GW compact binary merger candidate The LIGO Scientific Collaboration and the Virgo Collaboration
  
• 27183 IPN triangulation of GRB 200224C
  
• 27182 GRB 200224A: Swift/UVOT Detection
  
• 27181 Correction in name: GRB 200224B and GRB 200224C (not GRB 200224A)
  
• 27180 GRB 200219C: Swift-XRT afterglow confirmation
  
• 27179 GRB 200224A: Swift-XRT refined Analysis
  
• 27178 GRB 200224C: Fermi GBM Final Real-time Localization
  
• 27177 GRB 200224A: Tautenburg observations
  
• 27176 GRB 200224A: BOOTES-1 and 1.5m OSN optical observations
  
• 27175 Fermi trigger No 604213554: Global MASTER-Net observations report
  
• 27174 GRB 200224B: Fermi GBM Final Real-time Localization
  
• 27173 GRB 200224A: Swift detection of a burst
  
• 27172 Swift GRB200224.14: Global MASTER-Net observations report
  
• 27171 GRB 200223A: Fermi GBM Final Real-time Localization
  
• 27170 LIGO/Virgo S200219ac: no counterpart candidate in SVOM/GWAC-F30 observations
  
• 27169 LIGO/Virgo S200219ac: no counterpart candidate in SVOM/GWAC observations
  
• 27168 LIGO/Virgo S200219ac : No significant candidates in TAROT - FRAM - GRANDMA observations.
  
• 27167 IPN triangulation of GRB 200219B (inconsistent with the LIGO/Virgo S200219ac)
  
• 27166 GRB 200219C: OAJ afterglow confirmation
  
• 27165 GRB 200219A: UVOT Upper Limits
  
• 27164 GRB 200219A: FRAM-Auger optical limit
  
• 27163 GRB 200219C: CALET Gamma-Ray Burst Monitor detection
  
• 27162 GRB 200219С: Mondy and TSHAO optical observations
  
• 27161 GRB 200219C: Nanshan/NEXT optical upper limit and possible host galaxy from PanSTARRS
  
• 27160 LIGO/Virgo S200219ac: No counterpart candidates in KAIT observations
  
• 27159 GRB 200221A: Fermi GBM Final Real-time Localization
  
• 27158 Fermi trigger No 603949983: Global MASTER-Net observations report
  
• 27157 GRB 200219C: Swift-XRT afterglow detection
  
• 27156 GRB 200219C: DDOTI Observations
  
• 27155 GRB 200219C: Fermi GBM detection
  
• 27154 LIGO/Virgo S200213t: AT2020clw/ZTF20aanaoyz, AT2020crd/ZTF20aanakge and AT2020cly/ZTF20aanakes 10.4m GTC spectroscopy
  
• 27153 LIGO/Virgo S200213t: Swift UVOT and XRT observations of ZTF20aamvmzj (AT2020cja)
  
• 27152 GRB 200219C: Tiled Swift observations
  
• 27151 GRB 200219C: Fermi-LAT detection
  
• 27150 GRB 200215A: LCO Optical Upper Limits
  
• 27149 LIGO/Virgo S200219ac: No transient candidates in CALET observations
  
• 27148 GRB 200219A, Swift-BAT refined analysis
  
• 27147 LIGO/Virgo S200219ac: no counterpart candidates in the Swift/BAT observations
  
• 27146 Fermi trigger No 603849435: Global MASTER-Net observations report
  
• 27145 GRB 200219C: Fermi GBM Final Real-time Localization
  
• 27144 LIGO/Virgo S200219ac: Fermi GBM transient event not confidently associated with GW signal
  
• 27143 LIGO/Virgo S200219ac: No counterpart candidates in Fermi-LAT observations
  
• 27142 GRB 200219A: Swift-XRT refined Analysis correction
  
• 27141 LIGO/Virgo S200219ac: upper limits from AGILE/GRID observations
  
• 27140 LIGO/Virgo S200213t: Keck/LRIS spectroscopy of counterpart candidates from the Zwicky Transient Facility
  
• 27139 GRB 200219A: Swift-XRT refined Analysis
  
• 27138 GRB 200219A: Enhanced Swift-XRT position
  
• 27137 GRB 200219A: Fermi GBM observation
  
• 27136 LIGO/Virgo S200219ac: upper limits from AGILE/MCAL observations
  
• 27135 LIGO/Virgo S200219ac : no neutrino counterpart candidate in ANTARES search
  
• 27134 LIGO/Virgo S200219ac: Upper limits from IceCube neutrino searches
  
• 27133 LIGO/Virgo S200219ac: No counterpart candidates in HAWC observations
  
• 27132 LIGO/Virgo S200219ac: Coverage and upper limits from MAXI/GSC observations
  
• 27131 LIGO/Virgo S200219ac: No counterpart candidates in INTEGRAL SPI-ACS and IBIS prompt observation
  
• 27130 LIGO/Virgo S200219ac: Identification of a GW compact binary merger candidate
  
• 27129 LIGO/Virgo S200219ac: Global MASTER-Net observations report
  
• 27128 GRB 200216B: second epoch optical upper limit at Mondy observatory
  
• 27127 GRB 200219B: Fermi GBM Final Real-time Localization
  
• 27126 GRB 200219A: MASTER catalog automatic possible Host Galaxy candidate
  
• 27125 GRB 200219A: Swift detection of a short burst
  
• 27124 Swift GRB200219.32: Global MASTER-Net observations report
  
• 27123 GRB 200219A: Fermi GBM Final Real-time Localization
  
• 27122 GRB 200216B: Mondy and AbAO optical upper limits
  
• 27121 LIGO/Virgo (S200213t/IceCube neutrino candidate: No counterpart candidates in the Swift-XRT Observations
  
• 27120 GRB 200216B: Swift-XRT refined Analysis
  
• 27119 LIGO/Virgo S200213t: No EM counterparts found from continued GECKO observation of host galaxy candidates
  
• 27118 LIGO/Virgo S200213t: APO Upper Limits for ZTF20aanakes/AT2020cly
  
• 27117 GRB 200216B: Swift-BAT refined analysis
  
• 27116 LIGO/Virgo S200213t : No significant candidates in FRAM - OAJ - TAROT - GRANDMA observations
  
• 27115 Further Swift-XRT observations of Swift J0840.7-3516
  
• 27114 GRB 200216B - possible IR counterpart from VLT
  
• 27113 GRB 200215A: CALET Gamma-Ray Burst Monitor detection
  
• 27112 GRB 200216A: Fermi GBM detection
  
• 27111 LIGO/Virgo S200213t: AstroSat CZTI upper limits
  
• 27110 GRB 200216B: z-band limit from NOT
  
• 27109 GRB 200216B: Fermi GBM observation
  
• 27108 GRB 200216B: Swift/UVOT Upper Limits
  
• 27107 GRB 200216A: Swift/BAT detection and arcminute localization from GUANO
  
• 27106 GRB 200216B: Enhanced Swift-XRT position
  
• 27105 GRB 200215A: RATIR Optical Observations
  
• 27104 GRB 200216B: Nanshan/NEXT early optical upper limit and possible host galaxy
  
• 27103 GRB 200216B: GMG upper limit
  
• 27102 GRB 200216B: Swift detection of a burst
  
• 27101 GRB 200216B: Fermi GBM Final Real-time Localization
  
• 27100 Swift GRB200216.56: Global MASTER-Net observations report
  
• 27099 GRB 200215A: UKIRT H-band observations
  
• 27098 GRB 200215A: Swift-BAT refined analysis
  
• 27097 GRB 200216A: Fermi GBM Final Real-time Localization
  
• 27096 LIGO/Virgo S200213t: Updated Sky Localization
  
• 27095 LIGO/Virgo S200213t: Updated coverage and candidate list for the Zwicky Transient Facility
  
• 27094 LIGO/Virgo S200213t: CLU/NED Galaxies in the 4-Update Localization Volume
  
• 27093 LIGO/Virgo S200213t: Possible host galaxies in the bilby skymap
  
• 27092 LIGO/Virgo S200213t: Updated Sky Localization
  
• 27091 GRB 200215A: Swift-XRT refined Analysis
  
• 27090 GRB 200215A: Swift/UVOT Upper Limits
  
• 27089 GRB 200215A: Enhanced Swift-XRT position
  
• 27088 GRB 200215A: Optical observations form Calar Alto 2.2m
  
• 27087 GRB 200215A: Fermi GBM detection
  
• 27086 GRB 200215A: Liverpool Telescope upper limits
  
• 27085 LIGO/Virgo S200213t: Pre-discovery detections of MASTER OT J044008.76-651302.3
  
• 27084 LIGO/Virgo S200213t: No transient candidates in CALET observations
  
• 27083 GRB 200215A Possible host galaxy in PanSTARRS
  
• 27082 LIGO/Virgo S200213t: Lulin Follow-Up Observations
  
• 27081 GRB 200215A: Nanshan/NEXT optical upper limit
  
• 27080 Swift GRB200215.61: Global MASTER-Net observations report
  
• 27079 GRB 200215A: Swift detection of a burst
  
• 27078 GRB 200215A: Fermi GBM Final Real-time Localization
  
• 27077 LIGO/Virgo S200213t: MASTER possible Kilonova candidate in PGC315337
  
• 27076 LIGO/Virgo S200213t: No neutrino candidates at Pierre Auger Observatory
  
• 27075 LIGO/Virgo S200213t: P200 Spectroscopy of ZTF20aanakcd/AT2020cmr
  
• 27074 LIGO/Virgo S200213t: DBSP spectroscopy of AT2020cjb/ZTF20aamvnth, AT2020cja/ZTF20aamvmzj, AT2020cjc/ZTF20aamvoeh
  
• 27073 LIGO/Virgo S200114f: Gemini Spectra of AT 2020vu, AT 2020vw, AT 2020vy, and AT 2020vz
  
• 27072 LIGO/Virgo S200213t: MASTER OT detection in PGC673735
  
• 27071 LIGO/Virgo S200213t: Upper limits from Insight-HXMT/HE observations
  
• 27070 LIGO/Virgo S200213t: No counterpart candidates from Nanshan-0.6m observations
  
• 27069 LIGO/Virgo S200213t: No notable candidates in GOTO imaging
  
• 27068 LIGO/Virgo S200213t: One additional candidate from the Zwicky Transient Facility
  
• 27067 LIGO/Virgo S200213t: No Counterparts from GECKO observation of host galaxy candidates in GW-neutrino detection overlap area
  
• 27066 LIGO/Virgo S200213t: No candidates found in J-GEM follow-up observations
  
• 27065 LIGO/Virgo S200213t: More Candidates from the Zwicky Transient Facility
  
• 27064 LIGO/Virgo S200213t: No counterpart candidates in KAIT observations
  
• 27063 LIGO/Virgo S200213t: AT2020ciz/ZTF20aamvnat, AT2020cjb/ZTF20aamvnth and 2020cjf/ZTF20aamvodd 10.4m GTC spectroscopy
  
• 27062 LIGO/Virgo S200213t: No counterpart candidates in Fermi-LAT observations
  
• 27061 LIGO/Virgo S200213t: No Counterparts in DDOTI/OAN Optical Observations
  
• 27060 LIGO/Virgo S200213t: AT2020ciy/ZTF20aamvqxl, AT2020cjg/ZTF20aamvoxx and AT2020cje/ZTF20aamvtip 10.4m GTC spectroscopy
  
• 27059 LIGO/Virgo S200213t: MANGROVE catalog galaxy ranking
  
• 27058 LIGO/Virgo S200213t: Swift/BAT in the South Atlantic Anomaly
  
• 27057 LIGO/Virgo S191213g: AT2019wxt Wendelstein optical observations
  
• 27056 LIGO/Virgo S200213t: not observable by Fermi-GBM
  
• 27055 LIGO/Virgo S200213t: upper limits from AGILE/GRID observations
  
• 27054 LIGO/Virgo S200208q : No significant candidates in TAROT - FRAM - GRANDMA observations
  
• 27053 LIGO/Virgo S200208q: no counterpart candidate in SVOM/C-GFT observations
  
• 27052 LIGO/VIRGO S200213t: upper limits from AGILE/MCAL observations
  
• 27051 LIGO/Virgo S200213t: Candidates from the Zwicky Transient Facility
  
• 27050 LIGO/Virgo S200213t: No counterpart candidates in INTEGRAL SPI-ACS prompt observation
  
• 27049 LIGO/Virgo S200213t : no neutrino counterpart candidate in ANTARES search
  
• 27048 LIGO/Virgo S200213t: Coverage and upper limits from MAXI/GSC observations
  
• 27047 LIGO/Virgo S200213t: Neutrino and galaxies cross-match
  
• 27046 GRB 2002011A: AstroSat CZTI detection
  
• 27045 LIGO/Virgo trigger S200213t: Possible host galaxies
  
• 27044 LIGO/Virgo S200213t: NED Galaxies in the 90% Localization Volume
  
• 27043 LIGO/Virgo S200213t: 1 counterpart neutrino candidate from IceCube neutrino searches
  
• 27042 LIGO/Virgo S200213t: Identification of a GW compact binary merger candidate
  
• 27041 LIGO/Virgo S200213t: Global MASTER-Net observations report
  
• 27040 GRB 200212A: Fermi GBM Final Localization Correction
  
• 27039 ZTF20aajnksq: Upper limits from Konus-Wind observations
  
• 27038 Fermi trigger No 603197394: Global MASTER-Net observations report
  
• 27037 GRB 200212A: Fermi GBM Final Real-time Localization
  
• 27036 LIGO/Virgo S200208q: Updated Sky Localization
  
• 27035 GRB 200131A: Tautenburg observations
  
• 27034 Konus-Wind observation of GRB 200205B
  
• 27033 LIGO/Virgo S200208q: No counterpart candidates in KAIT observations
  
• 27032 GRB 200211A: BALROG localization (Fermi Trigger 603098793 / GRB 200211310)
  
• 27031 GRB 200211A: Fermi GBM Final Real-time Localization
  
• 27030 LIGO/Virgo S200208q: Not observable by CALET
  
• 27029 GRB 200207A: AstroSat CZTI detection
  
• 27028 LIGO/Virgo S200208q: No counterpart candidates in Fermi-LAT observations
  
• 27027 GRB 200205B: Chilescope optical observations
  
• 27026 LIGO/Virgo S200129m: Upper limits from Insight-HXMT/HE observations
  
• 27025 GRB 200120A: Fermi GBM observation
  
• 27024 LIGO/Virgo S200208q: Coverage and upper limits from MAXI/GSC observations
  
• 27023 LIGO/Virgo S200208q: no counterpart candidates in the Swift/BAT observations
  
• 27022 LIGO/Virgo S200208q: Upper limits from Fermi-GBM Observations
  
• 27021 LIGO/Virgo S200208q : upper limits from AGILE/GRID observations
  
• 27020 LIGO/Virgo S200208q: upper limits from AGILE/MCAL observations
  
• 27019 LIGO/Virgo S200208q: No counterpart candidates in INTEGRAL SPI-ACS prompt observation
  
• 27018 LIGO/Virgo S200208q: Global MASTER-Net observations report
  
• 27017 LIGO/Virgo S200208q: No counterpart candidates in HAWC observations
  
• 27016 LIGO/Virgo S200208q : no neutrino counterpart candidate in ANTARES search
  
• 27015 LIGO/Virgo S200208q: Upper limits from IceCube neutrino searches
  
• 27014 LIGO/Virgo S200208q: Identification of a GW compact binary merger candidate
  
• 27013 Fermi trigger No 602817262: Global MASTER-Net observations report
  
• 27012 GRB 200205B: Swift-BAT refined analysis
  
• 27011 GRB 200208A: Fermi GBM Final Real-time Localization
  
• 27010 Swift J0840.7-3516 (AKA GRB 200205A): Swift-BAT refined analysis
  
• 27009 Fermi trigger No 602731380: Global MASTER-Net observations report
  
• 27008 Swift Trigger 954840 is not a GRB
  
• 27007 Swift GRB200207.13: Global MASTER-Net observations report
  
• 27006 GRB 200205B: Swift/UVOT Detection
  
• 27005 GRB 200207A: Fermi GBM Final Real-time Localization
  
• 27004 GRB 200205B: ESO/NTT near-infrared imaging
  
• 27003 GRB 200205A = Swift J0840.7-3516: optical photometry in Chilescope observatory
  
• 27002 GRB 200206A: Fermi GBM Final Real-time Localization
  
• 27001 GRB 200205B: Swift-XRT refined Analysis
  
• 27000 GRB 200205A = Swift J0840.7-3516, A newly discovered transient X-ray Pulsar
  

After a while the above list gets too large and then the older entries are moved to the following lists.

Current Circulars 28000-present   20-06-20 to present
Circulars 27000-27999   20-02-06 to 20-06-20
Circulars 26000-26999   19-10-11 to 20-02-06
Circulars 25000-25999   19-07-06 to 19-10-11
Circulars 24000-24999   19-03-25 to 19-07-06
Circulars 23000-23999   18-07-21 to 19-03-25
Circulars 22000-22999   17-10-12 to 18-07-21
Circulars 21000-21999   17-04-07 to 17-10-12
Circulars 20000-20999   16-10-06 to 17-04-07
Circulars 19000-19999   16-02-07 to 16-10-06
Circulars 18000-18999   15-07-10 to 16-02-07
Circulars 17000-17999   14-10-31 to 15-07-09
Circulars 16000-16999   14-03-20 to 14-10-31
Circulars 15000-15999   13-07-10 to 14-03-19
Circulars 14000-14999   12-11-26 to 13-07-10
Circulars 13000-13999   12-02-29 to 12-11-25
Circulars 12900-12999   12-01-27 to 12-02-29
Circulars 12800-12899   12-01-03 to 12-01-27
Circulars 12700-12799   11-12-17 to 12-01-02
Circulars 12600-12699   11-11-29 to 11-12-16
Circulars 12500-12599   11-10-29 to 11-11-29
Circulars 12400-12499   11-09-28 to 11-10-29
Circulars 12300-12399   11-08-23 to 11-09-28
Circulars 12200-12299   11-07-26 to 11-08-22
Circulars 12100-12199   11-06-27 to 11-07-26
Circulars 12000-12099   11-05-04 to 11-06-27
Circulars 11900-11999   11-04-07 to 11-05-04
Circulars 11800-11899   11-03-18 to 11-04-07
Circulars 11700-11799   11-02-12 to 11-03-18
Circulars 11600-11699   11-01-25 to 11-02-12
Circulars 11500-11599   10-12-26 to 11-01-24
Circulars 11400-11499   10-11-13 to 10-12-26
Circulars 11300-11399   10-09-25 to 10-11-13
Circulars 11200-11299   10-09-03 to 10-09-25
Circulars 11100-11199   10-08-15 to 10-09-03
Circulars 11000-11099   10-07-27 to 10-08-15
Circulars 10900-10999   10-06-28 to 10-07-27
Circulars 10800-10899   10-05-26 to 10-06-28
Circulars 10700-10799   10-04-28 to 10-05-26
Circulars 10600-10699   10-04-15 to 10-04-28
Circulars 10500-10599   10-03-16 to 10-04-15
Circulars 10400-10499   10-02-11 to 10-03-16
Circulars 10300-10399   09-12-31 to 10-02-10
Circulars 10200-10299   09-11-28 to 09-12-30
Circulars 10100-10199   09-10-29 to 09-11-28
Circulars 10000-10099   09-10-08 to 09-10-29
Circulars 9900-9999   09-09-05 to 09-10-08
Circulars 9800-9899   09-08-14 to 09-09-05
Circulars 9700-9799   09-07-22 to 09-08-14
Circulars 9600-9699   09-07-01 to 09-07-22
Circulars 9500-9599   09-06-09 to 09-06-30
Circulars 9400-9499   09-05-19 to 09-06-09
Circulars 9300-9399   09-04-29 to 09-05-19
Circulars 9200-9299   09-04-23 to 09-04-29
Circulars 9100-9199   09-04-06 to 09-04-23
Circulars 9000-9099   09-03-15 to 09-04-06
Circulars 8900-8999   09-02-11 to 09-03-15
Circulars 8800-8899   09-01-12 to 09-02-10
Circulars 8700-8799   08-12-22 to 09-01-12
Circulars 8600-8699   08-12-03 to 08-12-22
Circulars 8500-8599   08-11-09 to 08-12-03
Circulars 8400-8499   08-10-24 to 08-11-08
Circulars 8300-8399   08-09-29 to 08-10-24
Circulars 8200-8299   08-09-08 to 08-09-29
Circulars 8100-8199   08-08-12 to 08-09-08
Circulars 8000-8099   08-07-23 to 08-08-12
Circulars 7900-7999   08-06-23 to 08-07-23
Circulars 7800-7899   08-06-04 to 08-06-23
Circulars 7700-7799   08-05-08 to 08-06-04
Circulars 7600-7699   08-04-13 to 08-05-08
Circulars 7500-7599   08-03-21 to 08-04-13
Circulars 7400-7499   08-03-10 to 08-03-21
Circulars 7300-7399   08-02-13 to 08-03-10
Circulars 7200-7299   08-01-21 to 08-02-13
Circulars 7100-7199   07-11-17 to 08-01-21
Circulars 7000-7099   07-10-25 to 07-11-17
Circulars 6900-6999   07-10-12 to 07-10-25
Circulars 6800-6899   07-09-19 to 07-10-12
Circulars 6700-6799   07-08-02 to 07-09-18
Circulars 6600-6699   07-07-05 to 07-08-02
Circulars 6500-6599   07-06-11 to 07-07-05
Circulars 6400-6499   07-05-09 to 07-06-11
Circulars 6300-6399   07-04-18 to 07-05-09
Circulars 6200-6299   07-03-12 to 07-04-18
Circulars 6100-6199   07-02-12 to 07-03-12
Circulars 6000-6099   07-01-07 to 07-02-12
Circulars 5900-5999   06-12-05 to 07-01-07
Circulars 5800-5899   06-11-10 to 06-12-05
Circulars 5700-5799   06-10-06 to 06-11-10
Circulars 5600-5699   06-09-23 to 06-10-06
Circulars 5500-5599   06-09-03 to 06-09-23
Circulars 5400-5499   06-08-05 to 06-09-03
Circulars 5300-5399   06-07-11 to 06-08-05
Circulars 5200-5299   06-06-10 to 06-07-11
Circulars 5100-5199   06-05-10 to 06-06-03
Circulars 5000-5099   06-04-24 to 06-05-10
Circulars 4900-4999   06-03-21 to 06-04-24
Circulars 4800-4899   06-02-20 to 06-03-21
Circulars 4700-4799   06-02-06 to 06-02-20
Circulars 4600-4699   06-01-25 to 06-02-06
Circulars 4500-4599   06-01-13 to 06-01-25
Circulars 4400-4499   05-12-27 to 06-01-13
Circulars 4300-4399   05-11-22 to 05-12-27
Circulars 4200-4299   05-11-06 to 05-11-22
Circulars 4100-4199   05-10-16 to 05-11-06
Circulars 4000-4099   05-09-19 to 05-10-16
Circulars 3900-3999   05-08-28 to 05-09-18
Circulars 3800-3899   05-08-14 to 05-08-28
Circulars 3700-3799   05-07-29 to 05-08-14
Circulars 3600-3699   05-07-13 to 05-07-29
Circulars 3500-3599   05-05-28 to 05-07-13
Circulars 3400-3499   05-05-10 to 05-05-28
Circulars 3300-3399   05-04-21 to 05-05-10
Circulars 3200-3299   05-04-09 to 05-04-21
Circulars 3100-3199   05-03-16 to 05-04-09
Circulars 3000-3099   05-01-30 to 05-03-16
Circulars 2900-2999   04-12-23 to 05-01-28
Circulars 2800-2899   04-10-13 to 04-12-23
Circulars 2700-2799   04-09-09 to 04-10-13
Circulars 2600-2699   04-05-14 to 04-09-09
Circulars 2500-2599   03-12-22 to 04-05-14
Circulars 2400-2499   03-09-25 to 03-12-21
Circulars 2300-2399   03-07-15 to 03-09-24
Circulars 2200-2299   03-05-03 to 03-07-15
Circulars 2100-2199   03-04-05 to 03-05-03
Circulars 2000-2099   03-03-27 to 03-04-05
Circulars 1900-1999   03-02-27 to 03-03-29
Circulars 1800-1899   03-01-11 to 03-02-27
Circulars 1700-1799   02-11-20 to 03-01-11
Circulars 1600-1699   02-10-07 to 02-11-19
Circulars 1500-1599   02-08-16 to 02-10-07
Circulars 1400-1499   02-05-31 to 02-08-16
Circulars 1300-1399   02-03-22 to 02-05-31
Circulars 1200-1299   01-12-13 to 02-03-12
Circulars 1100-1199   01-09-22 to 01-12-13
Circulars 1000-1099   01-03-02 to 01-09-22
Circulars 900-999   00-12-14 to 01-03-01
Circulars 800-899   00-09-27 to 00-12-14
Circulars 700-799   00-06-13 to 00-09-27
Circulars 600-699   00-03-08 to 00-06-13
Circulars 500-599   99-12-16 to 00-03-08
Circulars 400-499   99-08-10 to 99-12-16
Circulars 300-399   99-05-08 to 99-08-10
Circulars 199-299   99-01-23 to 99-05-07
Circulars 100-198   98-06-13 to 99-01-22
Circulars neg4-099   97-02-?? to 98-06-13

Tar file of all the circulars (as of a couple minutes after every midnight US EastCoast local time).
This tarfile is a convenient way of getting all the Circulars if you want to 'mine' them for some particular need.
(If you are willing to share, I would appreciate getting a copy (for my own private GCN_Administrater use)
of whatever statistical analyses you derive from your mining.)