[vsnet-grb 202495] GCN/SWIFT_XRT_POSITION_UPDATE

[Bacodine]

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Wed 08 May 13 17:37:32 UT
NOTICE_TYPE:     Swift-XRT Position UPDATE
TRIGGER_NUM:     555413,   Seg_Num: 0
GRB_RA:          305.3217d {+20h 21m 17.20s} (J2000),
                 305.4504d {+20h 21m 48.08s} (current),
                 304.8400d {+20h 19m 21.59s} (1950)
GRB_DEC:         +34.9583d {+34d 57' 29.8"} (J2000),
                 +35.0013d {+35d 00' 04.8"} (current),
                 +34.7983d {+34d 47' 53.8"} (1950)
GRB_ERROR:       2.5 [arcsec radius, statistical plus systematic, 90% containment]
GRB_INTEN:       1.00e-10 [erg/cm2/sec]
GRB_SIGNIF:      10.00 [sigma]
IMG_START_DATE:  16420 TJD;   128 DOY;   13/05/08
IMG_START_TIME:  61893.00 SOD {17:11:33.00} UT,   159.5 [sec] since BAT Trigger Time
TAM[0-3]:        100.00 100.00 100.00 100.00
AMPLIFIER:       1
WAVEFORM:        31
SUN_POSTN:        45.82d {+03h 03m 18s}  +17.27d {+17d 16' 18"}
SUN_DIST:         88.31 [deg]   Sun_angle= 6.7 [hr] (West of Sun)
MOON_POSTN:       31.02d {+02h 04m 05s}  +13.79d {+13d 47' 33"}
MOON_DIST:        78.57 [deg]
MOON_ILLUM:      2 [%]
GAL_COORDS:       73.69, -1.00 [deg] galactic lon,lat of the burst
ECL_COORDS:      320.86, 52.34 [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%.