[vsnet-grb 158137] GCN/SWIFT_XRT_POSITION_UPDATE

[Bacodine]

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Thu 15 Sep 11 13:39:05 UT
NOTICE_TYPE:     Swift-XRT Position UPDATE
TRIGGER_NUM:     503219,   Seg_Num: 0
GRB_RA:          310.8258d {+20h 43m 18.19s} (J2000),
                 310.9764d {+20h 43m 54.32s} (current),
                 310.1823d {+20h 40m 43.74s} (1950)
GRB_DEC:          -0.7245d {-00d 43' 28.2"} (J2000),
                  -0.6818d {-00d 40' 54.6"} (current),
                  -0.9053d {-00d 54' 19.1"} (1950)
GRB_ERROR:       5.6 [arcsec radius, statistical plus systematic, 90% containment]
GRB_INTEN:       1.00e-10 [erg/cm2/sec]
GRB_SIGNIF:      10.00 [sigma]
IMG_START_DATE:  15819 TJD;   258 DOY;   11/09/15
IMG_START_TIME:  48620.00 SOD {13:30:20.00} UT,   575.6 [sec] since BAT Trigger Time
TAM[0-3]:        100.00 100.00 100.00 100.00
AMPLIFIER:       1
WAVEFORM:        31
SUN_POSTN:       172.99d {+11h 31m 58s}   +3.03d {+03d 01' 36"}
SUN_DIST:        137.94 [deg]   Sun_angle= -9.2 [hr] (East of Sun)
MOON_POSTN:       23.86d {+01h 35m 26s}  +14.08d {+14d 05' 02"}
MOON_DIST:        73.59 [deg]
MOON_ILLUM:      91 [%]
GAL_COORDS:       45.85,-25.03 [deg] galactic lon,lat of the burst
ECL_COORDS:      313.07, 16.82 [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%.