[vsnet-grb 462408] GCN/SWIFT_XRT_POSITION_UPDATE

[Bacodine]

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Tue 20 Oct 20 05:58:08 UT
NOTICE_TYPE:     Swift-XRT Position UPDATE
TRIGGER_NUM:     1000926,   Seg_Num: 0
GRB_RA:          261.2278d {+17h 24m 54.67s} (J2000),
                 261.4244d {+17h 25m 41.85s} (current),
                 260.7555d {+17h 23m 01.30s} (1950)
GRB_DEC:         +31.4287d {+31d 25' 43.3"} (J2000),
                 +31.4112d {+31d 24' 40.4"} (current),
                 +31.4723d {+31d 28' 20.2"} (1950)
GRB_ERROR:       2.2 [arcsec radius, statistical plus systematic, 90% containment]
GRB_INTEN:       1.00e-10 [erg/cm2/sec]
GRB_SIGNIF:      10.00 [sigma]
IMG_START_DATE:  19142 TJD;   294 DOY;   20/10/20
IMG_START_TIME:  20995.00 SOD {05:49:55.00} UT,   148.8 [sec] since BAT Trigger Time
TAM[0-3]:        100.00 100.00 100.00 100.00
AMPLIFIER:       1
WAVEFORM:        31
SUN_POSTN:       205.35d {+13h 41m 24s}  -10.51d {-10d 30' 48"}
SUN_DIST:         68.09 [deg]   Sun_angle= -3.7 [hr] (East of Sun)
MOON_POSTN:      254.00d {+16h 55m 59s}  -21.95d {-21d 56' 47"}
MOON_DIST:        53.83 [deg]
MOON_ILLUM:      16 [%]
GAL_COORDS:       54.94, 31.18 [deg] galactic lon,lat of the burst
ECL_COORDS:      257.06, 54.47 [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 0.58% < P(seren) < 1.1%.