[vsnet-grb 259178] GCN/SWIFT_XRT_POSITION_UPDATE

[Bacodine]

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Thu 23 Apr 15 06:40:05 UT
NOTICE_TYPE:     Swift-XRT Position UPDATE
TRIGGER_NUM:     638808,   Seg_Num: 0
GRB_RA:          221.5786d {+14h 46m 18.86s} (J2000),
                 221.7624d {+14h 47m 02.98s} (current),
                 220.9784d {+14h 43m 54.82s} (1950)
GRB_DEC:         +12.2833d {+12d 16' 59.8"} (J2000),
                 +12.2196d {+12d 13' 10.7"} (current),
                 +12.4925d {+12d 29' 33.0"} (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:  17135 TJD;   113 DOY;   15/04/23
IMG_START_TIME:  23366.00 SOD {06:29:26.00} UT,   81.3 [sec] since BAT Trigger Time
TAM[0-3]:        100.00 100.00 100.00 100.00
AMPLIFIER:       1
WAVEFORM:        31
SUN_POSTN:        30.60d {+02h 02m 24s}  +12.44d {+12d 26' 41"}
SUN_DIST:        152.96 [deg]   Sun_angle= 11.3 [hr] (West of Sun)
MOON_POSTN:       91.45d {+06h 05m 47s}  +18.24d {+18d 14' 12"}
MOON_DIST:       122.30 [deg]
MOON_ILLUM:      24 [%]
GAL_COORDS:        9.72, 59.28 [deg] galactic lon,lat of the burst
ECL_COORDS:      214.92, 26.94 [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%.