[vsnet-grb 204037] GCN/SWIFT_XRT_POSITION_UPDATE

[Bacodine]

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Tue 28 May 13 16:56:18 UT
NOTICE_TYPE:     Swift-XRT Position UPDATE
TRIGGER_NUM:     556870,   Seg_Num: 0
GRB_RA:          139.5022d {+09h 18m 00.52s} (J2000),
                 140.6787d {+09h 22m 42.89s} (current),
                 134.6959d {+08h 58m 47.01s} (1950)
GRB_DEC:         +87.3010d {+87d 18' 03.6"} (J2000),
                 +87.2437d {+87d 14' 37.4"} (current),
                 +87.5055d {+87d 30' 19.7"} (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:  16440 TJD;   148 DOY;   13/05/28
IMG_START_TIME:  60258.00 SOD {16:44:18.00} UT,   174.1 [sec] since BAT Trigger Time
TAM[0-3]:        100.00 100.00 100.00 100.00
AMPLIFIER:       1
WAVEFORM:        31
SUN_POSTN:        65.72d {+04h 22m 54s}  +21.56d {+21d 33' 45"}
SUN_DIST:         67.75 [deg]   Sun_angle= -5.0 [hr] (East of Sun)
MOON_POSTN:      298.08d {+19h 52m 18s}  -15.96d {-15d 57' 51"}
MOON_DIST:       108.51 [deg]
MOON_ILLUM:      82 [%]
GAL_COORDS:      125.40, 28.72 [deg] galactic lon,lat of the burst
ECL_COORDS:       94.81, 64.73 [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%.