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TITLE:            GCN/LVC NOTICE
NOTICE_DATE:      Thu 27 Feb 25 01:02:41 UT
NOTICE_TYPE:      LVC Early_Warning
TRIGGER_NUM:      S250227y
TRIGGER_DATE:     20733 TJD;    58 DOY;   2025/02/27 (yyyy/mm/dd)
TRIGGER_TIME:     3745.738072 SOD {01:02:25.738072} UT
SEQUENCE_NUM:     1
GROUP_TYPE:       1 = CBC
SEARCH_TYPE:      0 = undefined
PIPELINE_TYPE:    1 = MBTA
FAR:              4.109e-08 [Hz]  (one per 281.7 days)  (one per 0.77 years)
PROB_NS:          1.00 [range is 0.0-1.0]
PROB_REMNANT:     1.00 [range is 0.0-1.0]
PROB_BNS:         0.01 [range is 0.0-1.0]
PROB_NSBH:        0.00 [range is 0.0-1.0]
PROB_BBH:         0.00 [range is 0.0-1.0]
PROB_MassGap:     0.00 [range is 0.0-1.0]
PROB_TERRES:      0.99 [range is 0.0-1.0]
TRIGGER_ID:       0x10
MISC:             0x189E403
SKYMAP_FITS_URL:  https://gracedb.ligo.org/api/superevents/S250227y/files/bayestar.multiorder.fits,0
EVENTPAGE_URL:    https://gracedb.ligo.org/superevents/S250227y/view/
COMMENTS:         LVC Early_Warning 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.  
 
 
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TITLE:            GCN/LVC_RETRACTION NOTICE
NOTICE_DATE:      Thu 27 Feb 25 01:26:59 UT
NOTICE_TYPE:      LVC Retraction
TRIGGER_NUM:      S250227y
TRIGGER_DATE:     20733 TJD;    58 DOY;   2025/02/27 (yyyy/mm/dd)
TRIGGER_TIME:     3745.738072 SOD {01:02:25.738072} UT
SEQUENCE_NUM:     2
TRIGGER_ID:       0x30
MISC:             0x289E700
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.