//////////////////////////////////////////////////////////////////////
TITLE:            GCN/LVC NOTICE
NOTICE_DATE:      Fri 21 Feb 25 17:54:29 UT
NOTICE_TYPE:      LVC Preliminary
TRIGGER_NUM:      S250221gb
TRIGGER_DATE:     20727 TJD;    52 DOY;   2025/02/21 (yyyy/mm/dd)
TRIGGER_TIME:     64433.805458 SOD {17:53:53.805458} UT
SEQUENCE_NUM:     1
GROUP_TYPE:       1 = CBC
SEARCH_TYPE:      1 = AllSky
PIPELINE_TYPE:    1 = MBTA
FAR:              7.814e-09 [Hz]  (one per 1481.1 days)  (one per 4.06 years)
PROB_NS:          0.00 [range is 0.0-1.0]
PROB_REMNANT:     0.00 [range is 0.0-1.0]
PROB_BNS:         0.00 [range is 0.0-1.0]
PROB_NSBH:        0.00 [range is 0.0-1.0]
PROB_BBH:         0.98 [range is 0.0-1.0]
PROB_MassGap:     0.10 [range is 0.0-1.0]
PROB_TERRES:      0.02 [range is 0.0-1.0]
TRIGGER_ID:       0x10
MISC:             0x1899C07
SKYMAP_FITS_URL:  https://gracedb.ligo.org/api/superevents/S250221gb/files/bayestar.multiorder.fits,0
EVENTPAGE_URL:    https://gracedb.ligo.org/superevents/S250221gb/view/
COMMENTS:         LVC Preliminary Trigger Alert.  
COMMENTS:         This event is an OpenAlert.  
COMMENTS:         LIGO-Hanford Observatory contributed to this candidate event.  
COMMENTS:         LIGO-Livingston Observatory contributed to this candidate event.  
COMMENTS:         VIRGO Observatory contributed to this candidate event.  
 
 
//////////////////////////////////////////////////////////////////////
TITLE:            GCN/LVC NOTICE
NOTICE_DATE:      Fri 21 Feb 25 17:59:05 UT
NOTICE_TYPE:      LVC Preliminary
TRIGGER_NUM:      S250221gb
TRIGGER_DATE:     20727 TJD;    52 DOY;   2025/02/21 (yyyy/mm/dd)
TRIGGER_TIME:     64433.805458 SOD {17:53:53.805458} UT
SEQUENCE_NUM:     2
GROUP_TYPE:       1 = CBC
SEARCH_TYPE:      1 = AllSky
PIPELINE_TYPE:    1 = MBTA
FAR:              7.814e-09 [Hz]  (one per 1481.1 days)  (one per 4.06 years)
PROB_NS:          0.00 [range is 0.0-1.0]
PROB_REMNANT:     0.00 [range is 0.0-1.0]
PROB_BNS:         0.00 [range is 0.0-1.0]
PROB_NSBH:        0.00 [range is 0.0-1.0]
PROB_BBH:         0.98 [range is 0.0-1.0]
PROB_MassGap:     0.10 [range is 0.0-1.0]
PROB_TERRES:      0.02 [range is 0.0-1.0]
TRIGGER_ID:       0x10
MISC:             0x2899E07
SKYMAP_FITS_URL:  https://gracedb.ligo.org/api/superevents/S250221gb/files/bayestar.multiorder.fits,1
EVENTPAGE_URL:    https://gracedb.ligo.org/superevents/S250221gb/view/
COMMENTS:         LVC Preliminary Trigger Alert.  
COMMENTS:         This event is an OpenAlert.  
COMMENTS:         LIGO-Hanford Observatory contributed to this candidate event.  
COMMENTS:         LIGO-Livingston Observatory contributed to this candidate event.  
COMMENTS:         VIRGO Observatory contributed to this candidate event.  
 
 
//////////////////////////////////////////////////////////////////////
TITLE:            GCN/LVC_RETRACTION NOTICE
NOTICE_DATE:      Fri 21 Feb 25 18:16:25 UT
NOTICE_TYPE:      LVC Retraction
TRIGGER_NUM:      S250221gb
TRIGGER_DATE:     20727 TJD;    52 DOY;   2025/02/21 (yyyy/mm/dd)
TRIGGER_TIME:     64433.805458 SOD {17:53:53.805458} UT
SEQUENCE_NUM:     3
TRIGGER_ID:       0x30
MISC:             0x3899F00
COMMENTS:         LVC Retraction of a previous Alert.  
COMMENTS:            
COMMENTS:         NOTE: This is a RETRACTION.  The trigger is no longer considered to be astrophysical in origin.  
COMMENTS:         This event is an OpenAlert.