[vsnet-grb 169087] GCN/SWIFT_XRT_POSITION_UPDATE

[Bacodine]

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Fri 24 Feb 12 04:52:39 UT
NOTICE_TYPE:     Swift-XRT Position UPDATE
TRIGGER_NUM:     515976,   Seg_Num: 0
GRB_RA:           40.9423d {+02h 43m 46.15s} (J2000),
                  41.0837d {+02h 44m 20.09s} (current),
                  40.3602d {+02h 41m 26.45s} (1950)
GRB_DEC:         -17.7610d {-17d 45' 39.5"} (J2000),
                 -17.7100d {-17d 42' 35.8"} (current),
                 -17.9722d {-17d 58' 20.0"} (1950)
GRB_ERROR:       2.4 [arcsec radius, statistical plus systematic, 90% containment]
GRB_INTEN:       1.00e-10 [erg/cm2/sec]
GRB_SIGNIF:      10.00 [sigma]
IMG_START_DATE:  15981 TJD;    55 DOY;   12/02/24
IMG_START_TIME:  16921.00 SOD {04:42:01.00} UT,   124.5 [sec] since BAT Trigger Time
TAM[0-3]:        100.00 100.00 100.00 100.00
AMPLIFIER:       1
WAVEFORM:        31
SUN_POSTN:       336.82d {+22h 27m 16s}   -9.68d {-09d 41' 04"}
SUN_DIST:         62.69 [deg]   Sun_angle= -4.3 [hr] (East of Sun)
MOON_POSTN:      359.10d {+23h 56m 25s}   +4.65d {+04d 39' 07"}
MOON_DIST:        47.07 [deg]
MOON_ILLUM:      5 [%]
GAL_COORDS:      198.95,-62.48 [deg] galactic lon,lat of the burst
ECL_COORDS:       32.10,-31.88 [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%.