[vsnet-grb 173573] GCN/SWIFT_XRT_POSITION_UPDATE

[Bacodine]

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sun 22 Apr 12 07:26:17 UT
NOTICE_TYPE:     Swift-XRT Position UPDATE
TRIGGER_NUM:     520658,   Seg_Num: 0
GRB_RA:          136.9096d {+09h 07m 38.30s} (J2000),
                 137.0789d {+09h 08m 18.94s} (current),
                 136.2209d {+09h 04m 53.02s} (1950)
GRB_DEC:         +14.0184d {+14d 01' 06.2"} (J2000),
                 +13.9683d {+13d 58' 05.8"} (current),
                 +14.2206d {+14d 13' 14.0"} (1950)
GRB_ERROR:       2.9 [arcsec radius, statistical plus systematic, 90% containment]
GRB_INTEN:       1.00e-10 [erg/cm2/sec]
GRB_SIGNIF:      10.00 [sigma]
IMG_START_DATE:  16039 TJD;   113 DOY;   12/04/22
IMG_START_TIME:  26104.00 SOD {07:15:04.00} UT,   180.4 [sec] since BAT Trigger Time
TAM[0-3]:        100.00 100.00 100.00 100.00
AMPLIFIER:       1
WAVEFORM:        31
SUN_POSTN:        30.37d {+02h 01m 30s}  +12.36d {+12d 21' 51"}
SUN_DIST:        102.75 [deg]   Sun_angle= -7.1 [hr] (East of Sun)
MOON_POSTN:       40.34d {+02h 41m 20s}  +17.67d {+17d 39' 56"}
MOON_DIST:        92.02 [deg]
MOON_ILLUM:      1 [%]
GAL_COORDS:      215.22, 36.44 [deg] galactic lon,lat of the burst
ECL_COORDS:      135.16, -2.37 [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%.