[vsnet-grb 493027] GCN/SWIFT_XRT_POSITION_UPDATE

[Bacodine]

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sat 24 Jul 21 20:30:15 UT
NOTICE_TYPE:     Swift-XRT Position UPDATE
TRIGGER_NUM:     1061482,   Seg_Num: 0
GRB_RA:          227.4139d {+15h 09m 39.33s} (J2000),
                 227.7000d {+15h 10m 48.00s} (current),
                 226.7512d {+15h 07m 00.29s} (1950)
GRB_DEC:          -6.2910d {-06d 17' 27.6"} (J2000),
                  -6.3720d {-06d 22' 19.2"} (current),
                  -6.1014d {-06d 06' 05.1"} (1950)
GRB_ERROR:       1.9 [arcsec radius, statistical plus systematic, 90% containment]
GRB_INTEN:       1.00e-10 [erg/cm2/sec]
GRB_SIGNIF:      10.00 [sigma]
IMG_START_DATE:  19419 TJD;   205 DOY;   21/07/24
IMG_START_TIME:  73029.00 SOD {20:17:09.00} UT,   179.8 [sec] since BAT Trigger Time
TAM[0-3]:        100.00 100.00 100.00 100.00
AMPLIFIER:       1
WAVEFORM:        31
SUN_POSTN:       124.42d {+08h 17m 41s}  +19.68d {+19d 40' 36"}
SUN_DIST:        104.62 [deg]   Sun_angle= -6.9 [hr] (East of Sun)
MOON_POSTN:      315.84d {+21h 03m 21s}  -21.54d {-21d 32' 26"}
MOON_DIST:        85.94 [deg]
MOON_ILLUM:      99 [%]
GAL_COORDS:      353.07, 42.73 [deg] galactic lon,lat of the burst
ECL_COORDS:      226.75, 10.99 [deg] ecliptic lon,lat of the burst
COMMENTS:        SWIFT-XRT Coordinates.  
COMMENTS:        This Notice was ground-generated -- not flight-generated.  
COMMENTS:        This is an Update Notice -- the RA,Dec values herein supersede the previous XRT_POS Notice.  
COMMENTS:        TAM values, flux and significance fields are not valid.  
COMMENTS:        This position was automatically generated on the ground using  
COMMENTS:        Photon Counting data telemetered via TDRSS (SPER data).  
COMMENTS:        See http://www.swift.ac.uk/sper/docs.php for details.  
COMMENTS:        This position was enhanced using UVOT field astrometry.  
COMMENTS:        The probability that this is a serendipitous source in the  
COMMENTS:        SPER window is 1.1% < P(seren) < 2.8%.