[vsnet-grb 164854] GCN/SWIFT_XRT_POSITION_UPDATE

[Bacodine]

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sun 25 Dec 11 04:17:10 UT
NOTICE_TYPE:     Swift-XRT Position UPDATE
TRIGGER_NUM:     510341,   Seg_Num: 0
GRB_RA:           13.1545d {+00h 52m 37.08s} (J2000),
                  13.3273d {+00h 53m 18.54s} (current),
                  12.4366d {+00h 49m 44.79s} (1950)
GRB_DEC:         +51.5716d {+51d 34' 17.7"} (J2000),
                 +51.6365d {+51d 38' 11.4"} (current),
                 +51.3001d {+51d 18' 00.3"} (1950)
GRB_ERROR:       2.3 [arcsec radius, statistical plus systematic, 90% containment]
GRB_INTEN:       1.00e-10 [erg/cm2/sec]
GRB_SIGNIF:      10.00 [sigma]
IMG_START_DATE:  15920 TJD;   359 DOY;   11/12/25
IMG_START_TIME:  14297.00 SOD {03:58:17.00} UT,   459.2 [sec] since BAT Trigger Time
TAM[0-3]:        100.00 100.00 100.00 100.00
AMPLIFIER:       1
WAVEFORM:        31
SUN_POSTN:       273.27d {+18h 13m 05s}  -23.40d {-23d 24' 10"}
SUN_DIST:        114.26 [deg]   Sun_angle= -6.7 [hr] (East of Sun)
MOON_POSTN:      279.24d {+18h 36m 57s}  -20.94d {-20d 56' 26"}
MOON_DIST:       108.76 [deg]
MOON_ILLUM:      0 [%]
GAL_COORDS:      123.12,-11.30 [deg] galactic lon,lat of the burst
ECL_COORDS:       36.10, 41.49 [deg] ecliptic lon,lat of the burst
COMMENTS:        SWIFT-XRT Coordinates.  
COMMENTS:        There is a bright star (mag=6.21) 9.85 arcmin from the XRT position.  
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%.