[vsnet-grb 459881] GCN/SWIFT_XRT_POSITION_UPDATE

[Bacodine]

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Fri 25 Sep 20 22:04:32 UT
NOTICE_TYPE:     Swift-XRT Position UPDATE
TRIGGER_NUM:     997453,   Seg_Num: 0
GRB_RA:          246.7858d {+16h 27m 08.59s} (J2000),
                 246.5366d {+16h 26m 08.78s} (current),
                 247.3995d {+16h 29m 35.87s} (1950)
GRB_DEC:         +78.3902d {+78d 23' 24.7"} (J2000),
                 +78.3445d {+78d 20' 40.0"} (current),
                 +78.4986d {+78d 29' 54.9"} (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:  19117 TJD;   269 DOY;   20/09/25
IMG_START_TIME:  78724.00 SOD {21:52:04.00} UT,   87.0 [sec] since BAT Trigger Time
TAM[0-3]:        100.00 100.00 100.00 100.00
AMPLIFIER:       1
WAVEFORM:        31
SUN_POSTN:       183.02d {+12h 12m 05s}   -1.31d {-01d 18' 29"}
SUN_DIST:         86.12 [deg]   Sun_angle= -4.2 [hr] (East of Sun)
MOON_POSTN:      298.34d {+19h 53m 23s}  -23.58d {-23d 34' 38"}
MOON_DIST:       106.10 [deg]
MOON_ILLUM:      69 [%]
GAL_COORDS:      111.68, 33.51 [deg] galactic lon,lat of the burst
ECL_COORDS:      109.83, 76.48 [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%.