[vsnet-grb 388732] GCN/SWIFT_XRT_POSITION_UPDATE

[Bacodine]

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sun 02 Dec 18 06:51:16 UT
NOTICE_TYPE:     Swift-XRT Position UPDATE
TRIGGER_NUM:     874334,   Seg_Num: 0
GRB_RA:          280.7352d {+18h 42m 56.44s} (J2000),
                 280.9227d {+18h 43m 41.43s} (current),
                 280.2398d {+18h 40m 57.55s} (1950)
GRB_DEC:         +27.9590d {+27d 57' 32.3"} (J2000),
                 +27.9788d {+27d 58' 43.6"} (current),
                 +27.9083d {+27d 54' 29.9"} (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:  18454 TJD;   336 DOY;   18/12/02
IMG_START_TIME:  23903.00 SOD {06:38:23.00} UT,   118.5 [sec] since BAT Trigger Time
TAM[0-3]:        100.00 100.00 100.00 100.00
AMPLIFIER:       1
WAVEFORM:        31
SUN_POSTN:       248.40d {+16h 33m 36s}  -21.95d {-21d 57' 05"}
SUN_DIST:         58.98 [deg]   Sun_angle= -2.2 [hr] (East of Sun)
MOON_POSTN:      190.32d {+12h 41m 18s}   +0.88d {+00d 52' 48"}
MOON_DIST:        90.12 [deg]
MOON_ILLUM:      26 [%]
GAL_COORDS:       57.44, 14.06 [deg] galactic lon,lat of the burst
ECL_COORDS:      285.10, 50.84 [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%.