[vsnet-grb 493940] GCN/SWIFT_FOM_OBSERVE

Bacodine vxw at capella2.gsfc.nasa.gov
Sat Jul 31 23:47:06 JST 2021


TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sat 31 Jul 21 14:47:06 UT
NOTICE_TYPE:     Swift-FOM Will_Observe
TRIGGER_NUM:     1062273,   Seg_Num: 0
GRB_RA:          255.992d {+17h 03m 58s} (J2000),
                 256.360d {+17h 05m 26s} (current),
                 255.143d {+17h 00m 34s} (1950)
GRB_DEC:         -37.851d {-37d 51' 02"} (J2000),
                 -37.879d {-37d 52' 45"} (current),
                 -37.781d {-37d 46' 52"} (1950)
GRB_DATE:        19426 TJD;   212 DOY;   21/07/31
GRB_TIME:        52388.53 SOD {14:33:08.53} UT
TRIGGER_INDEX:   20000
RATE_SIGNIF:     0.00 [sigma]
IMAGE_SIGNIF:    17.05 [sigma]
FLAGS:           0x3
MERIT:           98.39
SUN_POSTN:       131.05d {+08h 44m 11s}  +18.10d {+18d 06' 15"}
SUN_DIST:        128.64 [deg]   Sun_angle= -8.4 [hr] (East of Sun)
MOON_POSTN:       37.83d {+02h 31m 19s}  +12.21d {+12d 12' 47"}
MOON_DIST:       137.17 [deg]
MOON_ILLUM:      50 [%]
GAL_COORDS:      347.75,  2.17 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      258.59,-14.96 [deg] ecliptic lon,lat of the burst (or transient)
COMMENTS:        SWIFT Figure-of-Merit decision.  
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 matches a source in the ground catalog: 4U_1700-377,   delta=0.012 [deg].  
COMMENTS:           
COMMENTS:        The next comments were copied from the BAT_POS Notice:  
COMMENTS:        This is an image trigger.  (The RATE_SIGNIF is undefined.)  
COMMENTS:        A point_source was found.  
COMMENTS:        This matches a source in the on-board catalog.  
COMMENTS:        This is not a GRB.  
COMMENTS:        This is an interesting source.  
COMMENTS:        This trigger occurred at longitude,latitude = 123.91,-20.01 [deg].  



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