Older GCN Circulars Archive

1. Circulars 18000-18999
2. Other Circulars

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1) Listed in reverse serial number order -- newest first: 18999 - 18000:

• 18999 GRB 160203A: Zadko observatory - Gingin optical detection
  
• 18998 GRB 160203A: Swift-BAT refined analysis
  
• 18997 GRB 160206A: GROND Observations
  
• 18996 GRB 160206A: Swift-XRT observations
  
• 18995 GRB 160206B: iPTF P48 Observations and Optical Transient Candidates
  
• 18994 GRB 160206A: Tiled Swift observations
  
• 18993 GRB 160206A: MAXI/GSC detection
  
• 18992 GRB 160131A: TSHAO optical observations
  
• 18991 GRB 160131A: Mondy optcial observations
  
• 18990 GRB 160203A: TSHAO optical observations
  
• 18989 GRB 160203A: RATIR Optical Observations
  
• 18988 GRB 160131A: RATIR Optical Observations
  
• 18987 GRB 160203A: Skynet PROMPT-CTIO observations of the optical afterglow
  
• 18986 GRB 160203A: Swift-XRT refined Analysis
  
• 18985 GRB 160203A: TAROT La Silla - TAROT Calern - Zadko observations
  
• 18984 GRB 160203A: Swift/UVOT Detection
  
• 18983 GRB 160203A: Enhanced Swift-XRT position
  
• 18982 The bright GRB160203A: X-shooter spectroscopy and redshift
  
• 18981 GRB 160203A: LCOGT-Cerro Tololo optical afterglow confirmation
  
• 18980 GRB 160203A: GROND Afterglow Candidate
  
• 18979 GRB 160203A: Swift detection of a burst
  
• 18978 GRB 160131A: correction to VLA position
  
• 18977 GRB 160131A: VLA detection
  
• 18976 GRB160131A: NOEMA detection of the millimetre afterglow
  
• 18975 Fermi GBM trigger 475675010/160128498 is not a GRB
  
• 18974 Konus-Wind observation of GRB 160131A
  
• 18973 GRB 160131A: Optical observations from T150 OSN
  
• 18972 GRB 160131A: AbAO optical observations
  
• 18971 GRB 160131A: Mondy optical observations
  
• 18970 GRB 160131A Swift/UVOT Detection
  
• 18969 GRB 160131A: Xinglong/BFOSC spectroscopy
  
• 18968 GRB 160131A: MITSuME Ishigakijima Optical Observation
  
• 18967 GRB 160131A: GROND Detection of the Optical/NIR Afterglow
  
• 18966 GRB 160131A: GTC spectroscopy of the afterglow
  
• 18965 GRB 160131A: TNG spectroscopic observations and redshift
  
• 18964 GRB 160131A: Bassano Bresciano Observatory optical observations
  
• 18963 GRB 160131A: Swift-XRT refined Analysis
  
• 18962 GRB 160131A: Khureltogot optical observations
  
• 18961 GRB 160131A: TNG optical observations
  
• 18960 GRB 160131A: iTelescope optical observations
  
• 18959 GRB 160131A: Swift-BAT refined analysis
  
• 18958 GRB 160131A: Enhanced Swift-XRT position
  
• 18957 GRB 160131A: LCOGT-SSO optical observations
  
• 18956 GRB 160131A: RATIR Optical Observations
  
• 18955 GRB 160131A: Xinglong 60cm WFT optical observation
  
• 18954 GRB 160131A: Xinglong TNT optical observation
  
• 18953 GRB 160131A: LCOGT-FTN optical afterglow observations
  
• 18952 GRB 160131.35 MASTER-Net OT detection
  
• 18951 GRB 160131A: Swift detection of a burst with an optical counterpart
  
• 18950 GRB 160127A: RATIR Optical Observations
  
• 18949 GRB 160127A: Khureltogot optical observations
  
• 18948 GRB 160127A: MITSuME Akeno optical upper limits
  
• 18947 GRB 160127A: VLA Detection
  
• 18946 GRB 160127A: LCOGT-Sutherland optical upper limit
  
• 18945 GRB 160127A: Swift/UVOT Detection
  
• 18944 GRB 160127A: Swift-BAT refined analysis
  
• 18943 GRB 160127A: Swift-XRT refined Analysis
  
• 18942 GRB 160123A: TAROT La Silla observatory optical observations
  
• 18941 GRB 160127A: RATIR Optical Observations
  
• 18940 GRB 160127A: Enhanced Swift-XRT position
  
• 18939 GRB 160127A: TAROT La Silla observatory optical light curve
  
• 18938 GRB 160127A: Swift detection of a burst with an optical counterpart
  
• 18937 LIGO Virgo G211117: MWA Observations
  
• 18936 GRB 160123A: GROND Upper limits
  
• 18935 GRB 160121A: RATIR Optical Observations
  
• 18934 GRB 160118A CALET Gamma-Ray Burst Monitor detection
  
• 18933 GRB 160121A: TSHAO optical observation
  
• 18932 GRB 160123A: NOT J-band observations
  
• 18931 GRB 160123A: Swift/UVOT Upper Limits
  
• 18930 GRB 160123A: Swift-XRT refined Analysis
  
• 18929 GRB 160123A: Swift-BAT refined analysis
  
• 18928 GRB 160123A: LCOGT-SSO optical upper limit
  
• 18927 GRB 160123A: Enhanced Swift-XRT position
  
• 18926 GRB 160123A: Swift detection of a burst
  
• 18925 GRB 160121A: redshift from the 10.4m GTC
  
• 18924 GRB 160121A: RATIR Optical Observations
  
• 18923 GRB 160121A: Swift-XRT refined Analysis
  
• 18922 GRB 160121A: Swift/UVOT Upper Limits
  
• 18921 GRB 160121A: GROND Afterglow observations
  
• 18920 GRB 160121A: TSHAO optical afterglow confirmation
  
• 18919 GRB 160121A: Swift-BAT refined analysis
  
• 18918 GRB 160121A: Enhanced Swift-XRT position
  
• 18917 GRB 160121A: 1.8m MOA optical afterglow detection
  
• 18916 GRB 160117B: RATIR continued observations
  
• 18915 GRB 160117B: TNG spectroscopy and redshift confirmation
  
• 18914 LIGO/VIRGO G184098: Summary of VLA results for iPTF15cyk
  
• 18913 GRB 160121A: MASTER-Amur observations
  
• 18912 GRB 160121A: Swift detection of a burst
  
• 18911 Konus-Wind observation of GRB 160119A
  
• 18910 GRB 160117A: Swift-XRT afterglow detection
  
• 18909 GRB 160119A: VLA Detection
  
• 18908 GRB 160117B: VLA Detection
  
• 18907 GRB 160117B: further RATIR observations
  
• 18906 GRB 160119A: afterglow confirmation from the NOT
  
• 18905 GRB 160119A: BOOTES-2/TELMA Early Upper Limits
  
• 18904 GRB 160119A: Swift/UVOT Upper Limits
  
• 18903 LIGO/Virgo G184098: MASTER final result
  
• 18902 GRB 160119A: GROND optical/NIR afterglow observations
  
• 18901 GRB 160119A: RATIR Optical and NIR Observations
  
• 18900 GRB 160117B: RATIR Optical and NIR Observations
  
• 18899 GRB 160119A: Swift-BAT refined analysis
  
• 18898 GRB 160117B: further NOT optical observations of the afterglow
  
• 18897 GRB 160119A: Swift-XRT refined Analysis
  
• 18896 GRB 160119A: Enhanced Swift-XRT position
  
• 18895 GRB 160119A: NOT and GTC afterglow candidate
  
• 18894 GRB 160117B: Early iTelescope observation
  
• 18893 GRB 160119A: Swift detection of a burst
  
• 18892 GRB 160117A: Swift/UVOT Upper Limits
  
• 18891 GRB 151228B: AbAO optical upper limit
  
• 18890 GRB 160104A: ISON-Ussuriysk optical observations
  
• 18889 LIGO/Virgo G211117: Refined localization from CBC parameter estimation
  
• 18888 GRB 160117A: Swift-XRT observations
  
• 18887 GRB 160117B: GROND optical/NIR afterglow observations
  
• 18886 GRB 160117B: VLT/X-shooter spectroscopy
  
• 18885 GRB 160117B: iTelescope T17 optical observations
  
• 18884 GRB 160117B: NOT optical afterglow observations
  
• 18883 GRB 160117B: Swift-XRT refined Analysis
  
• 18882 GRB 160117A: Swift-BAT refined analysis
  
• 18881 GRB 160117B: Swift/UVOT Detection
  
• 18880 GRB 160117B: Enhanced Swift-XRT position
  
• 18879 Mistaken submission
  
• 18878 GRB 160117B: LCOGT-SSO optical observations
  
• 18877 GRB 160117B: MASTER-Amur OT observations
  
• 18876 Konus-Wind observation of GRB 160113A
  
• 18875 GRB 160117B: Swift detection of a burst with optical counterpart
  
• 18874 GRB 160117A: Swift detection of a burst
  
• 18873 LIGO/Virgo G211117: Preliminary VLA observation summary of PS15dpn
  
• 18872 GRB 160106A: CALET Gamma-Ray Burst Monitor detection
  
• 18871 IPN Triangulation of GRB 160113A
  
• 18870 LIGO/Virgo G211117: Further Swift-XRT sources
  
• 18869 Konus-Wind observation of GRB 160104B
  
• 18868 LIGO/Virgo G211117: INAF NOT follow-up of PanStarrs candidates
  
• 18867 Konus-Wind observation of GRB 160102A
  
• 18866 Konus-Wind observation of GRB 151231A
  
• 18865 Konus-Wind observation of GRB 160111A
  
• 18864 IPN Triangulation of GRB 160111A (short/hard)
  
• 18863 GRB 151225A: Correction to the trigger time of GCN 18724
  
• 18862 GRB 160113A: Swift-XRT observations
  
• 18861 GRB 160113A: Fermi GBM detection
  
• 18860 GRB 160113A: Swift ToO observations
  
• 18859 GRB 160113A: iPTF P48 Observations and Optical Transient Candidates
  
• 18858 LIGO/Virgo G184098: Refined localizations from CBC parameter estimation
  
• 18857 Konus-Wind observation of GRB 160107A
  
• 18856 GRB 160104A: Swift/UVOT Detection
  
• 18855 IPN Triangulation of GRB 151231A
  
• 18854 Konus-Wind observation of GRB 151229B
  
• 18853 LIGO/Virgo G211117: Updated FAR estimate based on offline re-analysis
  
• 18852 IPN Triangulation of GRB 151229B (extremely intense/long)
  
• 18851 LIGO/Virgo G184098: Updated FAR estimate
  
• 18850 LIGO/Virgo G211117: Distance estimate from GW data compared to redshift of PS15dpn
  
• 18849 LIGO/Virgo G211117: Swift observations of PS15dpn
  
• 18848 LIGO/Virgo G211117: iPTF Observations of PS15dpn
  
• 18847 LIGO/Virgo G211117: PESSTO classification of MASTER J165420.77-615258
  
• 18846 LIGO/Virgo G211117: VLA follow-up
  
• 18845 GRB 160107A: CALET Gamma-Ray Burst Monitor detection
  
• 18844 GRB 160107A: Fermi GBM observation
  
• 18843 LIGO/Virgo G211117: Pi of the Sky observations
  
• 18842 LIGO/Virgo G211117: VISTA imaging
  
• 18841 GRB 160104A: Continued MITSuME Akeno Optical Observation
  
• 18840 LIGO/Virgo G211117: Subaru Hyper Suprime-Cam follow-up observation
  
• 18839 GRB 160107A: MAXI/GSC detection
  
• 18838 Konus-Wind observation of GRB 160101A
  
• 18837 Konus-Wind observation of GRB 151225A
  
• 18836 IPN Triangulation of GRB 151225A (short/hard)
  
• 18835 LIGO/Virgo G211117: MASTER OT in ESO138-006 galaxy
  
• 18834 LIGO/Virgo G211117: Further Swift-XRT sources
  
• 18833 GRB 160104A: Nishi-Harima MINT Observations
  
• 18832 LIGO/Virgo G211117: Liverpool Telescope classification of EM candidates
  
• 18831 GRB 160104A: Spectroscopic observations from 10.4m GTC
  
• 18830 GRB 160104A: Swift-XRT refined Analysis
  
• 18829 GRB 160104A: Swift-BAT refined analysis
  
• 18828 GRB 160104A: Fermi GBM observation
  
• 18827 GRB 160104A: Mini-GWAC upper limit during prompt emission phase
  
• 18826 GRB 160104A: GWAC upper limit during prompt emission phase
  
• 18825 GRB 160104A: MITSuME Okayama upper limits
  
• 18824 LIGO/Virgo G211117: Summary of Pan-STARRS transients
  
• 18823 GRB 160104A: Xinglong TNT optical observation
  
• 18822 LIGO/Virgo G211117: INAF TNG follow-up of Kanata telescope candidate
  
• 18821 GRB 160104A: Enhanced Swift-XRT position
  
• 18820 GRB 160104A: MASTER early OT detection
  
• 18819 GRB 160104A: MITSuME Okayama Ks-band upper-limit
  
• 18818 GRB 160104B: MAXI/GSC detection
  
• 18817 GRB 160104A: MITSuME Akeno Optical Observation
  
• 18816 GRB 160104A: LCOGT-FTN afterglow candidate
  
• 18815 GRB 160104A: Swift detection of a burst
  
• 18814 GRB 160101A: CALET Gamma-Ray Burst Monitor detection
  
• 18813 LIGO/Virgo G211117: Fermi/LAT observations
  
• 18812 LIGO/Virgo G211117: Liverpool Telescope classification of EM candidates
  
• 18811 LIGO/Virgo G211117: Gemini classification of 7 Pan-STARRS transients
  
• 18810 GRB 151231A: CALET Gamma-Ray Burst Monitor detection
  
• 18809 LIGO/Virgo G211117: LOFAR follow-up
  
• 18808 GRB 160102A: Swift-XRT observations
  
• 18807 LIGO/Virgo G211117: Liverpool Telescope classification of EM candidates
  
• 18806 LIGO/Virgo G211117: PESSTO classification of Pan-STARRS transients
  
• 18805 GRB 160101A: MITSuME Akeno optical upper limits
  
• 18804 LIGO/Virgo G211117: MASTER OTs 26.XII.2015 - 01.I.2016
  
• 18803 LIGO/Virgo G211117: CSS/CRTS observations on 29/30 Dec 2015 UT
  
• 18802 GRB 160102A: Tiled Swift observations
  
• 18801 GRB 160102A: MAXI/GSC detection
  
• 18800 LIGO/Virgo G211117: La Silla - QUEST observations 2015 Dec 28 - 30
  
• 18799 GRB 160101B: Fermi-LAT detection
  
• 18798 GRB 160101B: Fermi GBM detection
  
• 18797 GRB 160101A: Swift/UVOT Detection
  
• 18796 GRB 160101A: Fermi GBM observation
  
• 18795 GRB 160101A: Swift-XRT afterglow detection
  
• 18794 GRB 160101A: Tiled Swift observations
  
• 18793 GRB 160101A: MAXI/GSC detection
  
• 18792 GRB 151227B: CALET Gamma-Ray Burst Monitor detection
  
• 18791 LIGO/Virgo G211117: Liverpool Telescope classification of EM candidates
  
• 18790 LIGO/Virgo G211117: FLOYDS Classification of SMTJ13331687-1607330 as a Two-Week-Old Type Ia Supernova
  
• 18789 LIGO/Virgo G211117: LBT follow-up imaging of iPTF15fhq
  
• 18788 GRB 151231B: Fermi GBM observation
  
• 18787 GRB 151231A: Fermi GBM observation
  
• 18786 LIGO/Virgo G211117: 44 transients from Pan-STARRS data during 2015-12-28/30
  
• 18785 Trigger 668949: Swift detection of V 404 Cyg
  
• 18784 LIGO/Virgo G211117: MAXI/GSC observations
  
• 18783 MASTER-NET observations of V404Cyg Swift Trigger 668877
  
• 18782 LIGO/Virgo G211117: Liverpool Telescope followup of EM candidates
  
• 18781 Konus-Wind observation of GRB 151227B
  
• 18780 LIGO/Virgo G211117: VLA follow-up
  
• 18779 LIGO/Virgo G211117: LBT Follow-up of iPTF15fen
  
• 18778 Trigger 668879: Swift detection of V 404 Cyg again
  
• 18777 Trigger 668877: Swift detection of V 404 Cyg
  
• 18776 LIGO/Virgo G211117: MAGIC very-high energy gamma-ray observations
  
• 18775 LIGO/Virgo G211117: INAF TNG follow-up of MASTER OT J020906.21+013800.1
  
• 18774 LIGO/Virgo G211117: OAO-WFC NIR follow-up observations
  
• 18773 IPN Triangulation of GRB 151227B
  
• 18772 GRB 151228A: Correction to GCN 18770
  
• 18771 LIGO/Virgo G211117: SkyMapper observations and transient candidate
  
• 18770 GRB 151228A: Swift-XRT refined Analysis
  
• 18769 V404Cyg Swift Trigger 668097: CrAO RT-22 radio observations
  
• 18768 LIGO/Virgo G211117: MASTER Observations of the 3 iPTF candidates
  
• 18767 V404Cyg Swift Trigger 668097: AbAO optical observations
  
• 18766 GRB 151228B: Swift/UVOT Detection
  
• 18765 GRB 151229A: MITSuME Akeno optical upper limits
  
• 18764 LIGO/Virgo G211117: Optical Observations with Kiso Schmidt telescope and KWFC
  
• 18763 LIGO/Virgo G211117: List of near-term future observation regions by Project Mini-GWAC of SVOM
  
• 18762 LIGO/Virgo G211117: iPTF Optical Transient Candidates
  
• 18761 GRB 151229A: MITSuME Okayama upper limits
  
• 18760 GRB 151229A: Swift-BAT Spectral lag analysis
  
• 18759 LIGO/Virgo G211117: La Silla - QUEST observations 2015 Dec 28, 29
  
• 18758 GRB 151228B: MITSuME Akeno optical upper limits
  
• 18757 GRB 151229A: Swift-XRT refined Analysis
  
• 18756 GRB 151229A: Fermi GBM observation
  
• 18755 GRB 151228B: Fermi GBM observation
  
• 18754 GRB 151228A: Swift-BAT refined analysis
  
• 18753 GRB 151229A: Swift/UVOT observations
  
• 18752 GRB 151228B: Swift-BAT refined analysis
  
• 18751 GRB 151229A: Swift-BAT refined analysis
  
• 18750 GRB 151229A: Enhanced Swift-XRT position
  
• 18749 GRB 151228B: Swift-XRT refined Analysis
  
• 18748 LIGO/Virgo G211117: Further Swift-XRT sources
  
• 18747 GRB 151228A: MITSuME Akeno optical upper limits
  
• 18746 GRB 151228A: T60 observations
  
• 18745 GRB 151229A: Swift detection of a short burst
  
• 18744 LIGO/Virgo G211117: DESGW program observations with DECam
  
• 18743 GRB 151228B: Enhanced Swift-XRT position
  
• 18742 LIGO/Virgo G211117: Optical NIR observation with Kanata telescope
  
• 18741 LIGO/Virgo G211117: Fermi GBM Observations
  
• 18740 LIGO/Virgo G211117: Optical follow-up with Kanata telescope
  
• 18739 GRB 151228B: Swift detection of a burst with an optical detection
  
• 18738 LIGO/Virgo G211117: MASTER Observations and Inspection + OT
  
• 18737 LIGO/Virgo G211117: INTEGRAL was inactive at the time of the event
  
• 18736 GRB 151228A: Fermi GBM observation
  
• 18735 LIGO/Virgo G211117: Pan-STARRS1 observations 2015-12-28
  
• 18734 LIGO/Virgo G211117: INAF VST-ESO PARANAL observations
  
• 18733 LIGO/Virgo G211117: Further Swift-XRT sources
  
• 18732 LIGO/Virgo G211117: Swift-XRT sources
  
• 18731 GRB 151228A: Swift detection of a short burst
  
• 18730 LIGO/Virgo G211117: SWASP optical observations
  
• 18729 LIGO/Virgo G211117: MASTER possible OT detection at the begining of inspection
  
• 18728 LIGO/Virgo G211117: Identification of a GW CBC Candidate
  
• 18727 GRB 151227B: Fermi GBM detection
  
• 18726 GRB 151227A: Fermi GBM detection
  
• 18725 GRB 151212A iTelescope observation
  
• 18724 GRB 151225A: CALET Gamma-Ray Burst Monitor detection of a possible short GRB
  
• 18723 Konus-Wind observation of GRB 151222A
  
• 18722 Fermi GBM trigger 472694170/151224997 is not a GRB
  
• 18721 V404Cyg Swift Trigger 668097: TSHAO optical observations
  
• 18720 IPN Triangulation of GRB 151222A (short/hard)
  
• 18719 Fermi GBM trigger 151221730 is not a GRB
  
• 18718 V404Cyg Swift Trigger 668097: MASTER-Tunka optical wake up detection
  
• 18717 V404Cyg Swift Trigger 668097:
  
• 18716 Trigger 668097: Swift detection of V 404 Cyg
  
• 18715 GRB 151222A: Fermi GBM detection
  
• 18714 Fermi GBM trigger 151221690 is not a GRB
  
• 18713 Fermi GBM trigger 472271765/151220108 is not a GRB
  
• 18712 IBAS Alert 7313 is SGR J1935+2154
  
• 18711 GRB 151221A: INTEGRAL detection of a short burst or possible SGR
  
• 18710 Fermi GBM trigger 472166503/151218890 is not a GRB
  
• 18709 LIGO/Virgo G184098: Fermi-LAT search for high-energy gamma-ray counterpart
  
• 18708 GRB 151215A: TSHAO optical observations
  
• 18707 GRB151215A: Continued P60 Observations
  
• 18706 GRB 151212B: CALET Gamma-Ray Burst Monitor detection
  
• 18705 GRB 151216A: MAXI/GSC detection
  
• 18704 GRB 151210B: Fermi GBM observation
  
• 18703 GRB 151215A: Early optical light curve from pt5m, La Palma
  
• 18702 GRB 151215A: MITSuME Akeno optical upper limits
  
• 18701 GRB 151210B: CALET Gamma-Ray Burst Monitor detection
  
• 18700 GRB 151215A: Swift-XRT refined Analysis
  
• 18699 GRB 151215A: Swift-BAT refined analysis
  
• 18698 GRB 151215A: Swift/UVOT detection
  
• 18697 GRB 151215A: MASTER early OT detection and light curve
  
• 18696 GRB 151215A: NOT spectroscopy and redshift
  
• 18695 GRB 151215A: Enhanced Swift-XRT position
  
• 18694 GRB 151215A: GROND Detection of the Optical/NIR Afterglow
  
• 18693 GRB 151215A: Prompt enhanced Swift-XRT position
  
• 18692 GRB 151215A: P60 Optical Afterglow Candidate
  
• 18691 GRB 151215A: Swift detection of a burst
  
• 18690 LIGO/Virgo G184098: LOFAR follow-up
  
• 18689 GRB 151212A: Swift/UVOT observations
  
• 18688 GRB 151212A: GROND Optical Afterglow Candidate
  
• 18687 GRB 151212A: Swift-XRT afterglow detection
  
• 18686 GRB 151212A: Tiled Swift observations
  
• 18685 GRB 151212A: MAXI/GSC detection
  
• 18684 GRB 151210A: Swift/UVOT Upper Limits
  
• 18683 GRB 151210A: Swift-BAT refined analysis
  
• 18682 GRB 151210A: Swift-XRT refined Analysis
  
• 18681 GRB 151210A: Enhanced Swift-XRT position
  
• 18680 GRB 151210A: GROND Afterglow Confirmation
  
• 18679 GRB 151210A: Optical afterglow candidate from LCOGT-Cerro Tololo
  
• 18678 GRB 151210A: Swift detection of a burst
  
• 18677 GRB 151205C: Optical follow-up observations at Kiso
  
• 18676 GRB 151205A: Khureltogot upper limit
  
• 18675 Swift detection of 4U 1850-03
  
• 18674 GRB 151205B: Deep GROND Upper limits
  
• 18673 GRB 130831A: MASTER early OT detection and LC
  
• 18672 GRB 151205B: further Swift-XRT observations
  
• 18671 GRB 151205C: Swift-XRT observations
  
• 18670 GRB 151205B, Swift-BAT refined analysis
  
• 18669 GRB 151205A: Swift-XRT refined Analysis
  
• 18668 GRB 151205A, Swift-BAT refined analysis
  
• 18667 GRB 151205C: Tiled Swift observations
  
• 18666 GRB 151205C: MAXI/GSC detection
  
• 18665 GRB 151205B: MASTER-NET early optical observations
  
• 18664 GRB 151205A: Fermi GBM detection
  
• 18663 GRB 151205A: Garching Telescope Upper Limit
  
• 18662 GRB 151205A: Initial UVOT observations
  
• 18661 GRB 151205B: Swift-XRT observations
  
• 18660 GRB 151205A: Swift/UVOT Upper Limits
  
• 18659 GRB 151205B: Swift detection of a burst
  
• 18658 GRB 151205A: Enhanced Swift-XRT position
  
• 18657 GRB 151205A: Swift detection of a burst
  
• 18656 GRB 151127A iTelescope observation
  
• 18655 LIGO/Virgo G184098: Results of of 2nd epoch of ASKAP follow-up
  
• 18654 Fermi GBM trigger 470712580/151202062 is not a GRB
  
• 18653 Fermi GBM trigger 470290196/151127174 is not a GRB
  
• 18652 GRB 151122A: Further Swift-XRT observations, no afterglow detected.
  
• 18651 Fermi GBM trigger 470375959/151128166 is not a GRB
  
• 18650 GRB 151127A: Swift/UVOT Upper Limits
  
• 18649 GRB 151127A: Swift-XRT refined Analysis
  
• 18648 GRB 151127A: Swift-BAT refined analysis
  
• 18647 GRB 151127A: Enhanced Swift-XRT position
  
• 18646 GRB 151127A: Planned XMM-Newton observation
  
• 18645 GRB 151127A: GROND K-band upper limit
  
• 18644 GRB 151127A: LCOGT-SSO optical upper limits
  
• 18643 GRB 151127A: Swift detection of a short burst
  
• 18642 GRB 151118A iTelescope observation
  
• 18641 GRB 151122A: Swift/UVOT Observations
  
• 18640 GRB 151122A: Swift-XRT observations
  
• 18639 GRB 151122A: Fermi GBM detection
  
• 18638 GRB 151122A: Swift ToO observations
  
• 18637 Subject: GRB 151122A: Swift detection of a burst
  
• 18636 Konus-Wind observation of GRB 151120A
  
• 18635 GRB 151027A: Maidanak optical observations
  
• 18634 Swift-BAT refined analysis of trigger 664624 from SGR J1819-1600
  
• 18633 Swift Trigger 664610 is not astrophysical
  
• 18632 Swift-BAT probable detection of an outburst from SGR J1819-1600 (AX J1818.8-1559)
  
• 18631 Swift Trigger 664610: is unlikely a GRB
  
• 18630 GRB 151118A: MITSuME Akeno optical upper limits
  
• 18629 GRB 151120A: Swift-XRT afterglow detection
  
• 18628 GRB 151120A: Fermi GBM observation
  
• 18627 GRB 151118A: AAO optical upper limit
  
• 18626 LIGO/Virgo G194575: Updated significance from offline GW analysis
  
• 18625 GRB 151120A: Swift ToO observations
  
• 18624 GRB 151120A: GROND optical/NIR afterglow
  
• 18623 GRB 151120A: A long GRB detected by INTEGRAL
  
• 18622 GRB 151118A, Swift-BAT refined analysis
  
• 18621 LIGO/Virgo G194575: Fermi GBM Observations
  
• 18620 610 MHz detection of GRB 151027A with the GMRT
  
• 18619 GRB 151118A: Early optical limit from pt5m, La Palma
  
• 18618 GRB 151118A: ISON-NM early optical limit
  
• 18617 GRB 151118A: Swift-XRT refined Analysis
  
• 18616 GRB 151027A: SAO RAS and Mt. Terskol observations
  
• 18615 GRB 151118A: Swift/UVOT Upper Limits
  
• 18614 GRB 151118A: Enhanced Swift-XRT position
  
• 18613 GRB GRB 151118A: MASTER-NET optical observations
  
• 18612 GRB 151118A: Optical observations from OSN
  
• 18611 GRB 151118A: Swift detection of a burst
  
• 18610 Swift-BAT resumption of normal operations
  
• 18609 GRB151027A; Optical observations
  
• 18608 GMRT radio detection of GRB 151027A
  
• 18607 GRB 151114A: GROND Detection of the Optical/NIR Afterglow Candidate
  
• 18606 GRB 151114A: Swift-XRT refined Analysis
  
• 18605 GRB 151107B: CALET Gamma-Ray Burst Monitor detection
  
• 18604 GRB 151114A: Swift-BAT refined analysis
  
• 18603 GRB 151112A: GROND photometric redshift and i'-band prediction
  
• 18602 GRB 151114A: Swift/UVOT Detection
  
• 18601 GRB 151114A: LCOGT-FTS afterglow observations
  
• 18600 GRB 151114A: Enhanced Swift-XRT position
  
• 18599 GRB 151114A: Swift detection of a burst with an optical counterpart
  
• 18598 GRB 151111A: GROND confirmation of the afterglow and photometric redshift estimate
  
• 18597 GRB 151112A: Swift/UVOT Upper Limits
  
• 18596 GRB 151112A: MAXI/GSC detection
  
• 18595 GRB 151112A: GROND Detection of the Optical/NIR Afterglow Candidate
  
• 18594 GRB 151112A: Swift-XRT refined Analysis
  
• 18593 GRB 151112A: Swift-BAT refined analysis
  
• 18592 GRB 151112A: Enhanced Swift-XRT position
  
• 18591 GRB 151112A: MASTER-NET optical limit
  
• 18590 GRB 151112A: initial UVOT observations
  
• 18589 GRB 151112A: Swift-XRT observations
  
• 18588 GRB 151112A: Swift detection of a burst
  
• 18587 GRB 151111A: Swift/UVOT upper limits
  
• 18586 Swift-BAT trigger 663164 is not a burst.
  
• 18585 GRB 151111A: GROND marginal detection of a afterglow candidate
  
• 18584 LIGO/Virgo G194575: VLA follow-up
  
• 18583 GRB 151111A: Swift-XRT refined Analysis
  
• 18582 GRB 151111A: Fermi GBM observation
  
• 18581 GRB 151111A: LCOGT-FTS afterglow observations
  
• 18580 GRB 151111A: Swift-BAT refined analysis
  
• 18579 GRB 151111A: Enhanced Swift-XRT position
  
• 18578 GRB 151111A: Swift detection of a burst
  
• 18577 IPN triangulation of GRB151107B
  
• 18576 GRB 151107B: MASTER-NET OT detection inside the FERMI error box
  
• 18575 GRB 151027A: continued Mondy optical observations
  
• 18574 GRB 151107B: Mini-MegaTORTORA limits on simultaneous optical emission
  
• 18573 LIGO/Virgo G194575: Liverpool Telescope observations of iPTF-15dld and iPTF-15dni
  
• 18572 LIGO/Virgo G194575: La Silla QUEST, Pan-STARRS and PESSTO observations of iPTF15dld
  
• 18571 GRB 151107A: Further investigation of the source nature
  
• 18570 GRB 151107B
  
• 18569 LIGO/Virgo G194575: Swift observations if iPTF15dld
  
• 18568 GRB 151107A, Swift-BAT refined analysis
  
• 18567 GRB 151027A: Hankasalmi optical observations
  
• 18566 LIGO/Virgo G194575: INAF-TNG/Asiago Telescope follow-up of iPTF15dld
  
• 18565 GRB 151107A: MASTER-NET optical observations
  
• 18564 GRB 151107A: Swift detection of a possible burst
  
• 18563 LIGO/Virgo G194575: INAF-Asiago Telescope further analysis of iPTF candidates
  
• 18562 Swift-BAT triggers are disabled
  
• 18561 LIGO/Virgo G194575: INAF-Asiago Telescope follow-up of iPTF candidates
  
• 18560 LIGO/Virgo G194575: VLA follow-up
  
• 18559 GRB 151027A: Mondy optical observations
  
• 18558 GRB 151027A: Mt. Terskol observatory optical observation
  
• 18557 LIGO/Virgo G194575: MAXI/GSC further analysis
  
• 18556 GRB 150910A: CrAO optical observations
  
• 18555 GRB 151027A: the missing GeV component
  
• 18554 GRB 151029A: FRAM optical afterglow detection
  
• 18553 LIGO/Virgo G194575: LT Spectroscopy of iPTF-15dmk
  
• 18552 GRB 151027A: Correction to GCN 18519
  
• 18551 GRB 151031A: MITSuME Akeno optical upper limits
  
• 18550 GRB 151031A: GROND observation
  
• 18549 LIGO/Virgo G194575: LT Spectroscopy of iPTF candidates
  
• 18548 GRB 151027B: ATCA radio detection
  
• 18547 GRB 151031A
  
• 18546 GRB 151031A: Swift/UVOT Detection
  
• 18545 GRB 151030A: Fermi GBM observation
  
• 18544 GRB 151031A: Swift-XRT refined Analysis
  
• 18543 GRB 151027B: RATIR Late-Time Upper Limits
  
• 18542 GRB 151031A: Swift-BAT refined analysis
  
• 18541 GRB 151031A: Enhanced Swift-XRT position
  
• 18540 GRB 151031A: VLT/X-shooter optical counterpart and redshift
  
• 18539 GRB 151027A: optical follow-up observations
  
• 18538 GRB 151031A: Swift detection of a burst
  
• 18537 GRB 151027A: Continued P60 Monitoring
  
• 18536 LIGO/Virgo G194575: INAF-TNG follow-up of iPTF15dkm and iPTF15dlj
  
• 18535 Correction to the Trigger Time for Swift GRB 151029A
  
• 18534 GRB 151029A: MITSuME Ishigakijima upper limits
  
• 18533 GRB 151027A: Optical counterpart detection
  
• 18532 GRB 151029A: Swift-XRT refined Analysis
  
• 18531 GRB 151029A: Swift/UVOT Detection
  
• 18530 GRB 151029A: LCOGT-FTS afterglow observations
  
• 18529 GRB 151027B: Swift UVOT detection
  
• 18528 LIGO/Virgo G194575: VLA follow-up
  
• 18527 GRB 151029A: Swift-BAT refined analysis
  
• 18526 GRB 151029A: Enhanced Swift-XRT position
  
• 18525 GRB 151027A: MAXI/GSC detection
  
• 18524 GRB 151029A VLT/X-shooter redshift
  
• 18523 GRB 151029A: GROND afterglow observations
  
• 18522 GRB 151029A: Swift detection of a burst with an optical counterpart
  
• 18521 GRB 151027A: SAO RAS optical observations
  
• 18520 GRB 151027B: LCOGT FTN afterglow observations
  
• 18519 GRB 151027A: NOT optical and NIR observations
  
• 18518 GRB 151027A: T100 observations
  
• 18517 GRB 151027B: Swift/UVOT Upper Limits
  
• 18516 Konus-Wind observation of GRB 151027A
  
• 18515 GRB 151027A : Xinglong TNT optical observation
  
• 18514 GRB 151027B: Swift-BAT refined analysis
  
• 18513 GRB 151027A: continued GMG observation
  
• 18512 GRB 151027B: RATIR Observations
  
• 18511 GRB 151027B: MASTER-NET early OT detection
  
• 18510 GRB 151027A: LCOGT-McDonald afterglow observations
  
• 18509 GRB 151027B: Swift-XRT refined Analysis
  
• 18508 GRB 151027A: VLA detection
  
• 18507 GRB 151027B: GROND Optical/NIR Afterglow Detection
  
• 18506 duplicate submission of 18505
  
• 18505 GRB 151027B: VLT/X-shooter redshift
  
• 18504 GRB 151027B: Enhanced Swift-XRT position
  
• 18503 GRB 151027A: THO optical observations
  
• 18502 GRB 151027A: UVOT Observations
  
• 18501 GRB 151027B: NOT optical afterglow candidate
  
• 18500 LIGO/Virgo G194575: RATIR Observation of La Silla - QUEST Candidate
  
• 18499 GRB 151027B: Swift detection of its 1000-th burst
  
• 18498 LIGO/Virgo O1 extended until January 12
  
• 18497 LIGO/Virgo G194575: iPTF Optical Transient Candidates
  
• 18496 GRB 151027A: Swift-BAT refined analysis
  
• 18495 GRB 151027A: Early RAPTOR Observations
  
• 18494 LIGO/Virgo G194575: MASTER Optical Inspection
  
• 18493 GRB 151027A: GMG observation
  
• 18492 GRB 151027A: Fermi GBM observation
  
• 18491 GRB 151027A: MITSuME Akeno Optical observation
  
• 18490 GRB 151027A: Swift-XRT refined Analysis
  
• 18489 LIGO/Virgo G194575: Swift observations of LSQ15bjb
  
• 18488 LIGO/Virgo G194575: INAF-TNG spectra of LSQ15bjb
  
• 18487 GRB 151027A: Keck/HIRES redshift
  
• 18486 LIGO/Virgo G194575: GROND multi-color observations
  
• 18485 GRB 151027A: Weihai optical observations
  
• 18484 LIGO/Virgo G194575: further Pan-STARRS observations of the RA=1hr localisation region
  
• 18483 Tentative redshift for GRB 151027A from Swift-XRT data
  
• 18482 GRB 151027A: Enhanced Swift-XRT position
  
• 18481 GRB 151027A: P60 afterglow confirmation and rebrightening
  
• 18480 GRB 151027A : ISON-NM early optical detection
  
• 18479 GRB 151027A: KAIT optical afterglow confirmation
  
• 18478 GRB 151027A: Swift detection of a burst with a bright optical afterglow
  
• 18477 LIGO/Virgo G194575: ASKAP followup
  
• 18476 LIGO/Virgo G194575: INAF-TNG follow-up of LSQ15bjb
  
• 18475 GRB 151006A: CALET Gamma-Ray Burst Monitor detection
  
• 18474 LIGO/Virgo G184098: VLA follow-up of iPTF15cyk
  
• 18473 LIGO/Virgo G194575: La Silla - QUEST followup
  
• 18472 GRB 151021A: Skynet PROMPT-CTIO/DSO17 observations of the optical afterglow
  
• 18471 LIGO/Virgo G194575: Near-infrared follow-up with OAO-WFC
  
• 18470 LIGO/Virgo G194575: Kanata/J-GEM optical follow-up
  
• 18469 GRB 151023A: Swift-BAT refined analysis
  
• 18468 LIGO/Virgo G194575: Pi of the Sky observations
  
• 18467 LIGO/Virgo G194575: MAXI/GSC observations
  
• 18466 LIGO/Virgo G194575: Swift observations
  
• 18465 GRB 151022A: OSN optical upper limit
  
• 18464 GRB 151023A: RATIR Observations
  
• 18463 GRB 151023A: Swift-XRT refined Analysis
  
• 18462 GRB 151023A: Swift/UVOT Upper Limits
  
• 18461 GRB 151023A
  
• 18460 LIGO/Virgo G194575: CQUEAN/LOAO observations
  
• 18459 GRB 151023A: Enhanced Swift-XRT position
  
• 18458 Possible Fermi-LAT Gamma-ray counterpart for LIGO/Virgo G194575
  
• 18457 LIGO/Virgo G194575: LOFAR follow-up
  
• 18456 GRB 151022A: Swift/UVOT Upper Limits
  
• 18455 LIGO/Virgo G194575: RATIR Observations of Nearby Galaxies in the 1sigma Error Region
  
• 18454 LIGO Virgo G194575: MWA Observations
  
• 18453a LIGO/Virgo G194575: INTEGRAL search of temporally coincident prompt hard X-ray emission
  
• 18453 LIGO/Virgo G194575: RATIR Observations of Nearby Galaxies in the 1sigma Error Region
  
• 18452 GRB 151022A: Swift-BAT refined analysis
  
• 18451 LIGO/Virgo G194575: more details on transients from Pan-STARRS in the RA=1hr localisation region
  
• 18450 GRB 151023A: Swift detection of a burst
  
• 18449 GRB 151022A: RATIR Upper Limits
  
• 18448a GRB 151022A: Swift-XRT refined Analysis
  
• 18448 LIGO/Virgo G194575: Fermi GBM Observations
  
• 18447 GRB 151022A: MITSuME Okayama upper limits
  
• 18446 LIGO/Virgo G194575: Mini-MegaTORTORA observations
  
• 18445 LIGO/Virgo G194575: transients from Pan-STARRS in the RA=1hr localisation region
  
• 18444 GRB 151022A: Enhanced Swift-XRT position
  
• 18443 LIGO Virgo G194575: TZAC TAROT observations
  
• 18442 LIGO/Virgo G194575: Identification of a GW CBC Candidate
  
• 18441 GRB 151022A: Mondy optical upper limit
  
• 18440 GRB 151022A: MITSuME Okayama Ks-band upper-limit
  
• 18439 GRB 151022A: Kanata/HOWPol optical observation
  
• 18438 GRB 151022A: Prompt enhanced Swift-XRT position
  
• 18437 GRB 151022A: MASTER-Ural observations
  
• 18436 GRB 151022A: Swift detection of a burst
  
• 18435 GRB 151021A: MITSuME Okayama Ks-band upper-limit
  
• 18434 GRB 151021B: Fermi GBM detection
  
• 18433 Konus-Wind observation of GRB 151021A
  
• 18432 GRB 151021A: Swift/UVOT Detection
  
• 18431 GRB 151021A: MITSuME Okayama upper limits
  
• 18430 GRB 151021A: Swift-XRT refined Analysis
  
• 18429 GRB 151021A: Swift-BAT refined analysis
  
• 18428 GRB 151021A: Enhanced Swift-XRT position
  
• 18427 GRB 151021A: MASTER-NET bright OT detection
  
• 18426 GRB 151021A: Optical counterpart and redshift from X-shooter
  
• 18425 GRB 151021A: Swift detection of a burst
  
• 18424 LIGO/Virgo G184098: LOFAR follow-up
  
• 18423 GRB 151004A: Swift-XRT follow-up observations
  
• 18422 GRB 151006A: Astrosat CZTI detection
  
• 18421 Trigger 659734: Swift detection of SAX J1750.8-2900 or other source near Galactic center
  
• 18420 LIGO/Virgo G184098: VLA follow-up of iPTF15cyk
  
• 18419 Fermi GBM trigger 466602792/151015495 is not a GRB
  
• 18418 LIGO/VIRGO G184098: PESSTO classifications of PanSTARRS transients in the northern region
  
• 18417 Fermi GBM trigger 466316973/151012187 is not a GRB
  
• 18416 GRB 151006A: Mondy optical upper limit
  
• 18415 GRB 151006A: MITSuME Akeno optical upper limits
  
• 18414 Fermi GBM trigger 466059859/151009211 is not a GRB
  
• 18413 Konus-Wind observation of GRB 151006A
  
• 18412 Swift Trigger 658045 is not a GRB
  
• 18411 GRB 151006A: OSN optical upper limit
  
• 18410 duplicate submission of 18409
  
• 18409 GRB 151006A: Swift-BAT refined analysis
  
• 18408 GRB 151006A: MITSuME Okayama Ks-band upper-limit
  
• 18407 GRB 151006A: Swift-XRT refined Analysis
  
• 18406 GRB 151006A: Fermi-LAT detection
  
• 18405 GRB 151006A: Swift/UVOT Upper Limits
  
• 18404 GRB 151006A: Fermi GBM detection
  
• 18403 GRB 151006A: Enhanced Swift-XRT position
  
• 18402 GRB 151006A: MITSuME Okayama upper limits
  
• 18401 Konus-Wind observation of GRB 151001B
  
• 18400 GRB 151006A: Kanata/HOWPol optical imaging polarimetry
  
• 18399 GRB 151006A: Prompt enhanced Swift-XRT position
  
• 18398 GRB 151006A: Swift detection of a burst
  
• 18397 LIGO/Virgo G184098: Further VST-ESO PARANAL observations
  
• 18396 Trigger 657564 / GRB 151004A: Swift BAT and XRT refined analysis
  
• 18395 LIGO/VIRGO G184098: PESSTO classification of PS15cbm in the northern region
  
• 18394 LIGO/Virgo G184098: ongoing Pan-STARRS search for optical transients
  
• 18393 Trigger 657564 / GRB 151004A: Swift/UVOT Upper Limits
  
• 18392 Swift Trigger 657564: MASTER-NET early optical observations.
  
• 18391 Swift Trigger 657564: XRT prompt analysis
  
• 18390 LIGO/Virgo G184098: MASTER OTs detection and Scenario Machine prediction
  
• 18389 Swift Trigger 657564: a probable GRB
  
• 18388 LIGO/Virgo G184098: Ongoing gravitational-wave analysis
  
• 18387 GRB 151001A: Swift-BAT refined analysis
  
• 18386 GRB 151001A: RATIR Observations
  
• 18385 A mistaken submission
  
• 18384 GRB 151001B: Swift/UVOT Upper Limits
  
• 18383 GRB 151001B: Swift-XRT refined Analysis
  
• 18382 GRB 151001B: Swift-BAT refined analysis
  
• 18381 GRB 151001A: Swift/UVOT Detection
  
• 18380 GRB 151001B: MASTER-NET early optical observations.
  
• 18379 GRB 151001A: NOT imaging
  
• 18378 GRB 151001A: Swift-XRT refined Analysis
  
• 18377 GRB 151001B: Enhanced Swift-XRT position
  
• 18376 GRB 151001A: Enhanced Swift-XRT position
  
• 18375 GRB 151001A: Fermi GBM detection
  
• 18374 GRB 151001B: Swift detection of a burst
  
• 18373 GRB 151001A: Swift detection of a burst with an optical counterpart
  
• 18372 LIGO/Virgo G184098: spectral classification of PS15cci
  
• 18371 LIGO/Virgo G184098: Update to LT Spectroscopy of PS15ccx
  
• 18370 LIGO/Virgo G184098: Liverpool Telescope Spectroscopy of PS15ccx
  
• 18369 GRB 150925A: Swift/UVOT Upper Limits
  
• 18368 GRB 150925A: Swift-BAT refined analysis
  
• 18367 GRB 150925A: Swift-XRT refined Analysis
  
• 18366 GRB 150925A: Enhanced Swift-XRT position
  
• 18365 GRB 150925A: Swift detection of a burst
  
• 18364 LIGO/Virgo G184098: LOFAR follow-up
  
• 18363 LIGO/Virgo G184098: ASKAP followup
  
• 18362 LIGO/Virgo G184098: ongoing Pan-STARRS search for optical transients
  
• 18361 LIGO/Virgo G184098: optical transient search with Kiso Schmidt telescope and KWFC on behalf of J-GEM collaboration
  
• 18360 Konus-Wind observation of GRB 150922A
  
• 18359 LIGO/VIRGO G184098: classifications of transients from the LSQ observations
  
• 18358 GRB 150922A: Fermi GBM observation
  
• 18357 IPN Triangulation of GRB 150922A (short/hard)
  
• 18356 Konus-Wind observation of GRB 150919A
  
• 18355 IPN Triangulation of GRB 150919A (short / hard)
  
• 18354 LIGO/Virgo G184098: INTEGRAL search of temporally coincident prompt hard X-ray emission
  
• 18353 LIGO/Virgo G184098: transient search with VISTA
  
• 18352 ANTARES neutrino detection: Fermi GBM Observations
  
• 18351 Fermi GBM trigger bn150920977 is not due to a GRB
  
• 18350 LIGO/Virgo G184098: DESGW followup program
  
• 18349 LIGO/Virgo G184098: SkyMapper observations
  
• 18348 LIGO/Virgo G184098: TAROT network optical observations
  
• 18347 LIGO/Virgo G184098: La Silla - QUEST Followup
  
• 18346 LIGO/Virgo G184098: Swift follow-up observations
  
• 18345 LIGO/Virgo G184098: MWA Followup
  
• 18344 LIGO/Virgo G184098: DESGW followup program
  
• 18343 LIGO/Virgo G184098: Pan-STARRS1 observations of the northern sky region
  
• 18342 LIGO/Virgo observing run 1 (O1) starts 2015-09-18 15:00 UTC
  
• 18341 LIGO/Virgo G184098: Keck II DEIMOS Spectra of iPTF Optical Candidates
  
• 18340 LIGO/Virgo G184098: Nearby Galaxies in Error Circle
  
• 18339 LIGO/Virgo G184098: Fermi-GBM ground-based follow-up
  
• 18338 LIGO/Virgo G184098: Observations from the TOROS collaboration
  
• 18337 LIGO/Virgo G184098: iPTF Optical Transient Candidates
  
• 18336 LIGO/Virgo G184098: VST-ESO PARANAL observations
  
• 18335 LIGO/Virgo G184098: Pan-STARRS1 observations of the northern sky region
  
• 18334 Instructions for reporting follow-up observations related to LIGO/Virgo G184098
  
• 18333 LIGO/Virgo G184098: observations by MASTER
• 18332 LIGO/Virgo G184098: TAROT La Silla Observatory optical observations (TZAC)
  
• 18331 LIGO/Virgo G184098: Swift follow-up observations
  
• 18330 LIGO/Virgo G184098: Burst candidate in LIGO engineering run data
  
• 18329 GRB 150915A: Swift-XRT refined Analysis
  
• 18328 GRB 150915A, Swift-BAT refined analysis
  
• 18327 GRB 150910A: AAO optical observations
  
• 18326 Konus-Wind observation of GRB 150911A
  
• 18325 GRB 150915A : IRSF NIR upper limits
  
• 18324 GRB 000000: test of sernum on the original circular
  
• 18323 GRB 150915A: NOT observations of a brightening afterglow
  
• 18322 GRB 150915A: Swift UVOT upper limits
  
• 18321 GRB 150906B: Further analysis of the Konus-Wind data
  
• 18320 GRB 150910A: Mt. Terskol observatory optical observations
  
• 18319 GRB 150910A: TSHAO optical observations
  
• 18318 GRB 150915A: VLT/X-shooter redshift
  
• 18317 GRB 150915A: GROND detection of an optical counterpart candidate
  
• 18316 GRB 150915A: MASTER-NET optical observations
  
• 18315 GRB 150915A: Swift detection of a burst
  
• 18314 GRB 150910A: T100 observations
  
• 18313 GRB 150911A: GROND Upper Limits
  
• 18312 GRB 150910A: Continued RATIR Observations
  
• 18311 GRB 150907A: Swift-XRT afterglow detection
  
• 18310 GRB 150912A: Swift-XRT and UVOT observations
  
• 18309 GRB 150911A: Chuguev observatory upper limit
  
• 18308 GRB 150911A: Mt. Terskol observatory upper limit
  
• 18307 GRB 150911A: Khureltogot upper limit
  
• 18306 GRB 150910A: Mt. Terskol observatory optical observation
  
• 18305 Fermi GBM trigger 463890496/150914103 is not a GRB
  
• 18304 GRB 150912A: MITSuME Ishigakijima upper limits
  
• 18303 GRB 150911A: WHT optical imaging
  
• 18302 GRB 150910A: RATIR Observations
  
• 18301 GRB 150910A: MITSuME Ishigakijima Optical Observation after 2 days
  
• 18300 GRB 150912A: MASTER-IAC optical observations
  
• 18299 GRB 150912A: Fermi GBM observation
  
• 18298 GRB 150906B - NGC 3313 association: Constraints from Ep-Eiso and Ep-Liso Relations
  
• 18297 GRB 150912A: Swift ToO observations
  
• 18296 GRB 150906B: theoretical estimation of redshift and isotropic energy
  
• 18295 GRB 150910A: P60 Observations
  
• 18294 GRB 150911A: P60 Observations
  
• 18293 GRB 150911A: Swift/UVOT Upper Limits
  
• 18292 GRB 150911A: Swift-BAT refined analysis
  
• 18291 GRB 150912A: A long GRB detected by INTEGRAL
  
• 18290 GRB 150911A: Swift-XRT refined Analysis
  
• 18289 GRB 150910A: AAO optical observations
  
• 18288 GRB 150910A: MITSuME Ishigakijima Optical Observation after 1 day
  
• 18287 GRB 150910A: Chuguev observatory optical observations
  
• 18286 GRB 150911A: MITSuME Okayama upper limits
  
• 18285 GRB 150910A: VLA Detection
  
• 18284 GRB 150910A: continued SAO RAS optical observations
  
• 18283 GRB 150911A: Enhanced Swift-XRT position
  
• 18282 GRB 150911A MITSuME Okayama Ks-band upper-limit
  
• 18281 GRB 150910A: TSHAO optical observations
  
• 18280 GRB 150911A: Swift detection of a burst
  
• 18279 GRB 150910A: NOT observations of the afterglow
  
• 18278 GRB 150910A: MITSuME Okayama Ks-band Observation
  
• 18277 GRB 150910A: GROND observation of the afterglow
  
• 18276 GRB 150910A: MITSuME Ishigakijima Optical Observation
  
• 18275 GRB 150910A: SAO RAS optical photometry
  
• 18274 GRB 150910A: Redshift from 10.4m GTC+OSIRIS
  
• 18273 GRB 150910A: Kast spectroscopy from 3m Shane telescope
  
• 18272 GRB 150910A: Swift-XRT refined Analysis
  
• 18271 GRB 150910A: Enhanced Swift-XRT position
  
• 18270 GRB 150910A: Swift/UVOT Detection of a Brightening Afterglow
  
• 18269 GRB 150910A: Nanshan optical observations
  
• 18268 GRB 150910A: Swift-BAT refined analysis
  
• 18267 GRB 150910A: MITSuME Okayama Optical Observation
  
• 18266 GRB 150910A: LCOGT FTN afterglow observations
  
• 18265 GRB 150910A: KAIT Optical Afterglow Detection
  
• 18264 GRB 150910A: Swift detection of a burst with an optical afterglow
  
• 18263 Short GRB 150906B: proximity to NGC 3313 galaxy group
  
• 18262 Swift Trigger 654954 is not an astrophysical event
  
• 18261 Fermi GBM trigger 463422723/150908689 is not a GRB
  
• 18260 GRB 150907B: Swift-XRT refined Analysis
  
• 18259 Konus-Wind observation of GRB 150906B
  
• 18258 IPN Triangulation of GRB 150906B (short/intense)
  
• 18257 Fermi GBM trigger 463339482/150907725 is too weak to be classified
  
• 18256 GRB 150907B: Swift-BAT refined analysis
  
• 18255 GRB 150907A: Swift/UVOT observations
  
• 18254 GRB 150907B: MASTER-SAAO early optical observations
  
• 18253 GRB 150907B: Enhanced Swift-XRT position
  
• 18252 GRB 150907B: GROND Upper Limits
  
• 18251 GRB 150907B: Swift-XRT observations
  
• 18250 GRB 150907A: Swift-XRT observations
  
• 18249 GRB 150907B: Swift detection of a burst
  
• 18248 Fermi GBM trigger 150907763 is not a GRB
  
• 18247 GRB 150907A: Tiled Swift observations
  
• 18246 GRB 150907A: MAXI/GSC detection
  
• 18245 GRB 150906A: Fermi GBM detection
  
• 18244 GRB 150818A: TSHAO and SAO RAS optical observations
  
• 18243 GRB 150902A: Swift-XRT afterglow detection
  
• 18242 ANTARES neutrino detection: ANU 2.3m and Kepler K2 Observations of the Swift x-ray source
  
• 18241 ANTARES neutrino detection: CAHA photometry & spectroscopy of the Swift source
  
• 18240 ANTARES neutrino Alert150901.32 alert and Swift XRT counterpart: MASTER optical observations and new possible candidate
  
• 18239 ANTARES neutrino detection and Swift/XRT counterpart: GMG observation
  
• 18238 GRB 150902A: Swift/UVOT Upper Limits
  
• 18237 GRB 150902A: Swift-XRT observations
  
• 18236 ANTARES neutrino detection: Optical/NIR spectroscopy of the Swift/XRT counterpart candidate from NOT
  
• 18235 GRB 150831A: 9.8 GHz VLA upper limits
  
• 18234 GRB 150902A: MASTER-SAAO optical observations
  
• 18233 Konus-Wind observation of GRB 150902A
  
• 18232 GRB 150901A, Swift-BAT refined analysis
  
• 18231 ANTARES neutrino detection and possible Swift X-ray counterpart
  
• 18230 GRB 150902A: Swift ToO observations
  
• 18229 GRB 150902A: Fermi GBM detection
  
• 18228 GRB 150902A: Fermi-LAT detection
  
• 18227 GRB 150831B: Swift/UVOT Upper Limits
  
• 18226 Konus-Wind observation of GRB 150831A
  
• 18225 GRB 150901A: Swift detection of a burst
  
• 18224 GRB 150821A: Flattening in the UVOT light curve
  
• 18223 GRB 150831B: Swift-BAT refined analysis
  
• 18222 GRB 150831B: Swift-XRT refined Analysis
  
• 18221 GRB 150831B: MASTER-IAC early optical observations
  
• 18220 GRB 150831B: Fermi GBM detection
  
• 18219 GRB 150831A: GROND Upper Limits
  
• 18218 GRB 150831A: Swift/UVOT Upper Limits
  
• 18217 GRB 150831B: Swift-XRT observations
  
• 18216 GRB 150831A: Swift-XRT refined Analysis
  
• 18215 GRB 150831B: Swift detection of a probable burst
  
• 18214 GRB 150831A: Swift-BAT refined analysis
  
• 18213 GRB 150818A: Spectroscopic confirmation of the SN from GTC
  
• 18212 GRB 150831A: Enhanced Swift-XRT position
  
• 18211 GRB 150831A: optical upper limit ISON-SSO
  
• 18210 INTEGRAL detection of GRB 150831A
  
• 18209 GRB 150831A: Swift detection of a short burst
  
• 18208 Fermi GBM trigger 150829183 is not a GRB
  
• 18207 Fermi GBM trigger 150828520 is not a GRB
  
• 18206 Fermi GBM trigger 150827524 is not a GRB
  
• 18205 GRB 150818A: possible SN rise in light curve of Mondy observations
  
• 18204 Fermi GBM trigger 150826536 is not a GRB
  
• 18203 Konus-Wind observation of GRB 150824A
  
• 18202 IPN Triangulation of GRB 150824A
  
• 18201 GRB 150824A: Fermi GBM detection
  
• 18200 Konus-Wind observation of GRB 150821A
  
• 18199 GRB 150821A: LCOGT Siding Springs early observations
  
• 18198 Konus-Wind observation of GRB 150818A
  
• 18197 GRB 150821A: LCOGT Sutherland observations
  
• 18196 GRB 150821A, Swift-BAT refined analysis
  
• 18195 GRB 150821A: GROND afterglow observations
  
• 18194 GRB 150821A: Swift-XRT refined Analysis
  
• 18193 GRB 150819A: Mondy and TSHAO optical upper limits
  
• 18192 GRB 150821A: Swift/UVOT Detection
  
• 18191 GRB 150821A: Enhanced Swift-XRT position
  
• 18190 GRB 150821A: Fermi GBM detection
  
• 18189 GRB 150818A: continued Mondy optical observations
  
• 18188 Swift Trigger 652824 is due to noise
  
• 18187 GRB 150821A: VLT/X-shooter redshift
  
• 18186 GRB 150821A: Swift detection of a burst with an optical afterglow
  
• 18185 Swift Trigger 652824: Is most likely a noise fluctuation in the direction of M31
  
• 18184 GRB 120729A: KAIT Optical Observations
  
• 18183 KAIT Optical Upper Limits for GRB 120422A, 120724A, 120803B, 120911A, and 120923A
  
• 18182 GRB 150818A: Mondy optical observations
  
• 18181 GRB150819A: NOT imaging
  
• 18180 Konus-Wind observation of GRB 150819B
  
• 18179 GRB 150818A: Continued NOT monitoring - afterglow confirmation
  
• 18178 GRB 150819B: Fermi GBM detection
  
• 18177 GRB 150818A: 10.4m GTC spectroscopy and host galaxy
  
• 18176 IPN Triangulation of GRB 150819B (short / very intense)
  
• 18175 GRB 150818A: Mondy optical observations
  
• 18174 GRB 150818A: MITSuME Ishigakijima upper limits
  
• 18173 GRB 150819A: RATIR Optical Observations
  
• 18172 GRB 150819A: Swift-XRT refined Analysis
  
• 18171 GRB 150818A: MITSuME Akeno optical upper limits
  
• 18170 GRB 150819A: Swift-BAT refined analysis
  
• 18169 GRB 150819A: MASTER-IAC early upper limit
  
• 18168 GRB 150819A: Swift/UVOT Upper Limits
  
• 18167 GRB 150819A: Enhanced Swift-XRT position
  
• 18166 GRB 150818A: Swift-XRT update, correction to GCN 18162
  
• 18165 GRB 150819A: Prompt enhanced Swift-XRT position
  
• 18164 GRB 150818A: NOT imaging
  
• 18163 GRB 150819A: Swift detection of a burst
  
• 18162 GRB 150818A: Swift-XRT refined Analysis
  
• 18161 GRB 150818A: Swift/UVOT Detection
  
• 18160 GRB 150817A: AAO optical observations
  
• 18159 GRB 150818A: Enhanced Swift-XRT position
  
• 18158 GRB 150817A: LCOGT observations
  
• 18157 GRB 150818A: Swift-BAT refined analysis
  
• 18156 GRB 150817A: Continued RATIR Optical Observations - Afterglow Confirmation
  
• 18155 GRB 150818A: Swift/UVOT candidate afterglow
  
• 18154 GRB 150818A: Planned XMM-Newton observation
  
• 18153 GRB 150817A: P60 Observations
  
• 18152 GRB 150818A: Swift detection of a burst
  
• 18151 MASTER OT inside bright ESO240-010 galaxy detection during FERMI trigger GRB150816.83 inspection
  
• 18150 GRB 150817A: Swift/UVOT Upper Limits
  
• 18149 GRB 150817A: Fermi GBM observation
  
• 18148 GRB 150817A: Swift-BAT refined analysis
  
• 18147 GRB 150817A: Swift-XRT refined Analysis
  
• 18146 GRB 150817A: Enhanced Swift-XRT position
  
• 18145 GRB 150817A: Continued RATIR Observations, Revised Candidate
  
• 18144 GRB 150817A: RATIR Optical Afterglow Candidate
  
• 18143 GRB 150817A: Swift detection of a burst
  
• 18142 Fermi GBM Trigger 150815694 is not a GRB
  
• 18141 GRB 150811A: Continued RATIR Observations
  
• 18140 GRB 150811A: Continued RATIR Observations
  
• 18139 GBM Trigger 150813665 is not a GRB
  
• 18138 Swift Trigger 652046 is a particle shower event
  
• 18137 Konus-Wind observation of GRB 150811B
  
• 18136 Swift Trigger 652046 is probably not a GRB
  
• 18135 GRB 150811A: KAIT Refined Analysis
  
• 18134 GRB 150811A: VLA Detection
  
• 18133 IPN Triangulation of GRB 150811B
  
• 18132 GRB 150811A: Continued RATIR Observations
  
• 18131 GRB 150811A: Swift/UVOT further observations
  
• 18130 GRB 150811B: Fermi GBM detection
  
• 18129 GRB 150811A: Swift-BAT refined analysis
  
• 18128 GRB 150811A: SAO RAS optical observations
  
• 18127 GRB 150811A: Swift-XRT refined Analysis
  
• 18126 GRB 150810A: Fermi GBM detection
  
• 18125 GRB 150811A: P60 Observations
  
• 18124 GRB 150811A: Enhanced Swift-XRT position
  
• 18123 GRB 150811A: LCOGT-McDonald afterglow detection
  
• 18122 GRB 150811A: Swift/UVOT Detection
  
• 18121 GRB 150811A: KAIT optical candidate
  
• 18120 GRB 150811A: RATIR Optical Afterglow Detection
  
• 18119 GRB 150811A: Swift detection of a burst
  
• 18118 Fermi GBM GRB Trigger 460608875: iPTF P48 Observations
  
• 18117 Fermi GBM trigger 150807969 is not a GRB
  
• 18116 Fermi GBM trigger 150806450 is not a GRB
  
• 18115 GRB 150728A: TNG optical observations
  
• 18114 Fermi GBM trigger 150805556 is not a GRB
  
• 18113 GRB 150727A: IRSF NIR observation
  
• 18112 GRB 150801A: Swift-XRT observations
  
• 18111 GRB 150801B: Swift/UVOT Upper Limits
  
• 18110 GRB 150801B: Swift-BAT refined analysis
  
• 18109 GRB 150801B: Swift-XRT refined Analysis
  
• 18108 GRB 150801B: Enhanced Swift-XRT position
  
• 18107 Fermi GBM triggers 150730606 150731173 and 150801590 are not due to GRBs
  
• 18106 Fermi GBM GRB Trigger 458852670: iPTF P48 Observations
  
• 18105 GRB 150721A (Fermi GBM Trigger 459150552): iPTF P48 Observations
  
• 18104 GRB 150801B: Swift detection of a burst
  
• 18103 GRB 150801A: Tiled Swift observations
  
• 18102 GRB 150801A: MAXI/GSC detection
  
• 18101 GRB 150724B: Swift-XRT afterglow detection
  
• 18100 GRB 150424A: HST imaging
  
• 18099 GRB 150724B: Retraction of the uvot detection
  
• 18098 GRB 150728A: Continued RATIR Optical Observations
  
• 18097 GRB 150728A: TSHAO optical observations
  
• 18096 GRB 150728A: RATIR Optical Observations
  
• 18095 GRB 150727A: Continued RATIR Optical Observations - Fading
  
• 18094 GRB 150728A: AAO optical observations
  
• 18093 GRB 150728A: Swift-XRT refined Analysis
  
• 18092 GRB 150728A: Swift/UVOT Upper Limits
  
• 18091 GRB 150728A: Swift-BAT refined analysis
  
• 18090 GRB 150728A: FTN observations
  
• 18089 GRB 150727A: RATIR Optical Observations
  
• 18088 GRB 150728A: Enhanced Swift-XRT position
  
• 18087 GRB 150728A: Swift detection of a GRB
  
• 18086 GRB 150727A: Swift-BAT refined analysis
  
• 18085 GRB 150727A: Watcher optical upper limit
  
• 18084 GRB 150727A: Swift/UVOT Detection
  
• 18083 GRB 150727A: LCOGT-Cerro Tololo observations
  
• 18082 GRB 150727A: Swift-XRT refined Analysis
  
• 18081 GRB 150727A: Fermi GBM detection
  
• 18080 GRB 150727A: VLT/X-shooter redshift
  
• 18079 GRB 150727A: Enhanced Swift-XRT position
  
• 18078 GRB 150724B: Continued RATIR Optical Observation
  
• 18077 GRB 150724B: MASTER upper limit
  
• 18076 GRB 150727A: Swift detection of a burst with an optical counterpart
  
• 18075 GRB 150724B: Swift/UVOT Detection
  
• 18074 Konus-Wind observation of GRB 150724B
  
• 18073 Konus-Wind observation of GRB 150725A
  
• 18072 GRB 150724B: RATIR Optical Observations
  
• 18071 Swift Trigger 650408 is not a burst
  
• 18070 Swift 650221/IGR J00291+5934: Liverpool Telescope observations
  
• 18069 GRB 150724B: Swift-XRT observations
  
• 18068 GRB 150724B: Swift ToO observations
  
• 18067 IGR J00291+5934, Swift-BAT refined analysis
  
• 18066 GRB 150724B: Fermi GBM detection
  
• 18065 GRB 150724B: Fermi-LAT detection
  
• 18064 Swift Trigger 650221 / IGR J00291+5934: MASTER-IAC OT observations
  
• 18063 Fermi GBM trigger 150725291 is not a GRB
  
• 18062 GRB 150725A: MAXI/GSC detection
  
• 18061 Trigger 650221: Swift detection of a IGR J00291+5934
  
• 18060 Correction to GCN 18059: Parameterisation of Swift-XRT light curve
  
• 18059 GRB 150724A: Swift-XRT refined Analysis
  
• 18058 Swift IGR J00291+5934: MASTER Optical flare detection
  
• 18057 GRB 150724A: Swift/UVOT Upper Limits
  
• 18056 IGR J00291+5934: Swift-BAT refined analysis
  
• 18055 GRB 150724A: Swift-BAT refined analysis
  
• 18054 GRB 150724A: Enhanced Swift-XRT position
  
• 18053 SGR 1E 1841-045 (Swift trigger 649113): Terskol upper limit
  
• 18052 GRB 150724A: Prompt enhanced Swift-XRT position
  
• 18051 Trigger 650140: Swift detection of IGR J00291+5934
  
• 18050 GRB 150724A: Swift detection of a burst
  
• 18049 GRB 150722A: LCOGT-Sutherland observations
  
• 18048 GRB 150722A: Swift-BAT refined analysis
  
• 18047 GRB 150722A: Swift-XRT refined Analysis
  
• 18046 GRB 150722A: Swift/UVOT Upper Limits
  
• 18045 GRB 150720A: Swift/UVOT Upper Limits
  
• 18044 GRB 150722A: Enhanced Swift-XRT position
  
• 18043 GRB 150722A: Swift-XRT observations
  
• 18042 GRB 150722A: Swift detection of a burst
  
• 18041 GRB 150721A: Fermi GBM detection
  
• 18040 GRB 150720A: Enhanced Swift-XRT position
  
• 18039 GRB 150720A: Swift-XRT refined Analysis
  
• 18038 GRB 150720A: Swift-BAT refined analysis
  
• 18037 Swift Trigger 649706: a possible GRB or bright Galactic transient
  
• 18036 GRB 150716A: KAIT Optical Upper Limit
  
• 18035 GRB 150711A: Burakan-ISON optical observations
  
• 18034 GRB 150716A: Swift-BAT refined analysis
  
• 18033 GRB 150716A: Swift/UVOT Upper Limits
  
• 18032 GRB 150716A: Continued RATIR Optical Observations
  
• 18031 Swift trigger 649143 is not AX J1619.4-4945 or other astrophysical source
  
• 18030 GRB 150716A: Swift-XRT refined Analysis
  
• 18029 GRB 150716A: P60 Candidate Optical Afterglow
  
• 18028 GRB 150716A: RATIR Optical Observations
  
• 18027 GRB 150716A: Swift detection of a burst
  
• 18026 Fermi GBM triggers bn150715759 and bn150715817 are not due to GRBs
  
• 18025 Trigger 649143: Swift detection of AX J1619.4-4945
  
• 18024 Trigger 649113: Swift detection of SGR 1E 1841-045
  
• 18023 Fermi Gamma-ray Burst Monitor triggers that are not GRBs
  
• 18022 GRB 150710B: Swift-XRT afterglow detection
  
• 18021 Fermi GBM trigger 458312518/150711543 is not a GRB
  
• 18020 GRB 150711A: Swift-BAT refined analysis
  
• 18019 Konus-Wind observation of GRB 150710B
  
• 18018 GRB 150710B: Swift-XRT and Swift-UVOT observations
  
• 18017 GRB 150711A: Swift/UVOT Upper Limits
  
• 18016 GRB 150711A: Swift-XRT refined Analysis
  
• 18015 GRB 150711A: Fermi GBM detection
  
• 18014 GRB 150711A: Observations from the 2.5m NOT
  
• 18013 GRB 150710B refined analysis
  
• 18012 GRB 150711A: Enhanced Swift-XRT position
  
• 18011 GRB 150711A: Swift detection of a burst
  
• 18010 GRB 150710B: Swift ToO observations
  
• 18009 GRB 150710B detected in ground analysis of BAT data
  
• 18008 GRB 150710A: Swift/UVOT Upper Limits
  
• 18007 MASTER OT Detection during Fermi Trigger 458235025 inspection
  
• 18006 GRB 150710A: host galaxy for Swift XRT second candidate
  
• 18005 Swift-XRT observations of GRB 150710A
  
• 18004 Confirmation that Swift trigger 648422 is not an astrophysical source
  
• 18003 Konus-Wind observation of GRB 150710A (Swift trigger 648437)
  
• 18002 GRB 150710A: Swift-BAT refined analysis
  
• 18001 GRB 150710A: RATIR Observations
  
• 18000 Swift trigger 648437: A GRB or a burst from 1RXS J125754.7+141850
  

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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