[vsnet-grb 492895] GCN/SWIFT_XRT_POSITION_UPDATE

[Bacodine]

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Fri 23 Jul 21 15:08:32 UT
NOTICE_TYPE:     Swift-XRT Position UPDATE
TRIGGER_NUM:     1061284,   Seg_Num: 0
GRB_RA:          121.7211d {+08h 06m 53.06s} (J2000),
                 121.9313d {+08h 07m 43.51s} (current),
                 121.2337d {+08h 04m 56.08s} (1950)
GRB_DEC:         -32.8853d {-32d 53' 07.0"} (J2000),
                 -32.9486d {-32d 56' 54.9"} (current),
                 -32.7399d {-32d 44' 23.7"} (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:  19418 TJD;   204 DOY;   21/07/23
IMG_START_TIME:  53536.00 SOD {14:52:16.00} UT,   365.1 [sec] since BAT Trigger Time
TAM[0-3]:        100.00 100.00 100.00 100.00
AMPLIFIER:       1
WAVEFORM:        31
SUN_POSTN:       123.21d {+08h 12m 50s}  +19.94d {+19d 56' 07"}
SUN_DIST:         52.90 [deg]   Sun_angle= 0.1 [hr] (West of Sun)
MOON_POSTN:      297.18d {+19h 48m 43s}  -24.81d {-24d 48' 42"}
MOON_DIST:       122.06 [deg]
MOON_ILLUM:      100 [%]
GAL_COORDS:      250.31, -0.34 [deg] galactic lon,lat of the burst
ECL_COORDS:      135.14,-51.47 [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 0.11% < P(seren) < 0.58%.