[vsnet-grb 204556] GCN/SWIFT_XRT_POSITION_UPDATE

[Bacodine]

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Tue 04 Jun 13 07:07:44 UT
NOTICE_TYPE:     Swift-XRT Position UPDATE
TRIGGER_NUM:     557354,   Seg_Num: 0
GRB_RA:          250.1888d {+16h 40m 45.31s} (J2000),
                 250.1849d {+16h 40m 44.37s} (current),
                 250.2056d {+16h 40m 49.34s} (1950)
GRB_DEC:         +68.2259d {+68d 13' 33.2"} (J2000),
                 +68.2006d {+68d 12' 02.0"} (current),
                 +68.3202d {+68d 19' 12.8"} (1950)
GRB_ERROR:       3.6 [arcsec radius, statistical plus systematic, 90% containment]
GRB_INTEN:       1.00e-10 [erg/cm2/sec]
GRB_SIGNIF:      10.00 [sigma]
IMG_START_DATE:  16447 TJD;   155 DOY;   13/06/04
IMG_START_TIME:  25095.00 SOD {06:58:15.00} UT,   228.0 [sec] since BAT Trigger Time
TAM[0-3]:        100.00 100.00 100.00 100.00
AMPLIFIER:       1
WAVEFORM:        31
SUN_POSTN:        72.47d {+04h 49m 53s}  +22.46d {+22d 27' 32"}
SUN_DIST:         89.32 [deg]   Sun_angle= -11.8 [hr] (East of Sun)
MOON_POSTN:       22.83d {+01h 31m 20s}  +11.63d {+11d 37' 46"}
MOON_DIST:        93.40 [deg]
MOON_ILLUM:      17 [%]
GAL_COORDS:       99.92, 36.99 [deg] galactic lon,lat of the burst
ECL_COORDS:      158.63, 82.24 [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 0.11% < P(seren) < 0.58%.