[vsnet-grb 259264] GCN/SWIFT_XRT_POSITION_UPDATE

[Bacodine]

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Fri 24 Apr 15 07:56:46 UT
NOTICE_TYPE:     Swift-XRT Position UPDATE
TRIGGER_NUM:     638946,   Seg_Num: 0
GRB_RA:          152.3060d {+10h 09m 13.44s} (J2000),
                 152.4823d {+10h 09m 55.75s} (current),
                 151.7306d {+10h 06m 55.35s} (1950)
GRB_DEC:         -26.6310d {-26d 37' 51.6"} (J2000),
                 -26.7065d {-26d 42' 23.5"} (current),
                 -26.3851d {-26d 23' 06.5"} (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:  17136 TJD;   114 DOY;   15/04/24
IMG_START_TIME:  28079.00 SOD {07:47:59.00} UT,   302.1 [sec] since BAT Trigger Time
TAM[0-3]:        100.00 100.00 100.00 100.00
AMPLIFIER:       1
WAVEFORM:        31
SUN_POSTN:        31.59d {+02h 06m 22s}  +12.79d {+12d 47' 40"}
SUN_DIST:        123.15 [deg]   Sun_angle= -8.1 [hr] (East of Sun)
MOON_POSTN:      105.60d {+07h 02m 24s}  +17.38d {+17d 23' 04"}
MOON_DIST:        63.36 [deg]
MOON_ILLUM:      34 [%]
GAL_COORDS:      263.58, 23.58 [deg] galactic lon,lat of the burst
ECL_COORDS:      165.62,-35.21 [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%.