[vsnet-grb 482070] GCN/SWIFT_FOM_OBSERVE

Bacodine vxw at capella2.gsfc.nasa.gov
Wed Apr 21 09:28:14 JST 2021


TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Wed 21 Apr 21 00:28:14 UT
NOTICE_TYPE:     Swift-FOM Will_Observe
TRIGGER_NUM:     1044426,   Seg_Num: 0
GRB_RA:          104.908d {+06h 59m 38s} (J2000),
                 105.191d {+07h 00m 46s} (current),
                 104.244d {+06h 56m 59s} (1950)
GRB_DEC:          +4.934d {+04d 56' 03"} (J2000),
                  +4.903d {+04d 54' 12"} (current),
                  +5.004d {+05d 00' 15"} (1950)
GRB_DATE:        19325 TJD;   111 DOY;   21/04/21
GRB_TIME:        1650.30 SOD {00:27:30.30} UT
TRIGGER_INDEX:   253
RATE_SIGNIF:     11.44 [sigma]
IMAGE_SIGNIF:    10.17 [sigma]
FLAGS:           0x3
MERIT:           100.00
SUN_POSTN:        29.00d {+01h 56m 00s}  +11.87d {+11d 52' 07"}
SUN_DIST:         75.50 [deg]   Sun_angle= -5.1 [hr] (East of Sun)
MOON_POSTN:      133.35d {+08h 53m 23s}  +22.15d {+22d 08' 50"}
MOON_DIST:        32.24 [deg]
MOON_ILLUM:      58 [%]
GAL_COORDS:      209.47,  4.07 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      105.61,-17.70 [deg] ecliptic lon,lat of the burst (or transient)
COMMENTS:        SWIFT Figure-of-Merit decision.  
COMMENTS:           
COMMENTS:        WARNING: No BAT_Position TDRSS message was received for this trigger_number!  
COMMENTS:           
COMMENTS:        Because no BAT_Position Notice was received, this FOM Notice was forced out after watchdog expiration.  
COMMENTS:        This was of sufficient merit to become the new Automated Target;  
COMMENTS:        but if the Current PPT has a greater merit, then we will not request a slew.  
COMMENTS:        FOM will request the s/c to slew.  
COMMENTS:        The S/C has yet to make its decision about safe to slew or not.  
COMMENTS:        This does not match any source in the ground catalog.  
COMMENTS:           
COMMENTS:        The next comments were copied from the BAT_POS Notice:  
COMMENTS:        This is a rate trigger.  
COMMENTS:        A point_source was found.  
COMMENTS:        This does not match any source in the on-board catalog.  
COMMENTS:        This is a GRB.  
COMMENTS:        This trigger occurred at longitude,latitude = 211.05,12.46 [deg].  



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