[vsnet-grb 203942] GCN/SWIFT_XRT_POSITION_UPDATE

[Bacodine]

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Mon 27 May 13 14:36:31 UT
NOTICE_TYPE:     Swift-XRT Position UPDATE
TRIGGER_NUM:     556753,   Seg_Num: 0
GRB_RA:          309.2767d {+20h 37m 06.40s} (J2000),
                 309.4749d {+20h 37m 53.98s} (current),
                 308.5360d {+20h 34m 08.64s} (1950)
GRB_DEC:         -24.7250d {-24d 43' 30.0"} (J2000),
                 -24.6777d {-24d 40' 39.5"} (current),
                 -24.8999d {-24d 53' 59.4"} (1950)
GRB_ERROR:       2.7 [arcsec radius, statistical plus systematic, 90% containment]
GRB_INTEN:       1.00e-10 [erg/cm2/sec]
GRB_SIGNIF:      10.00 [sigma]
IMG_START_DATE:  16439 TJD;   147 DOY;   13/05/27
IMG_START_TIME:  52007.00 SOD {14:26:47.00} UT,   316.8 [sec] since BAT Trigger Time
TAM[0-3]:        100.00 100.00 100.00 100.00
AMPLIFIER:       1
WAVEFORM:        31
SUN_POSTN:        64.61d {+04h 18m 26s}  +21.39d {+21d 23' 12"}
SUN_DIST:        120.77 [deg]   Sun_angle= 7.7 [hr] (West of Sun)
MOON_POSTN:      281.34d {+18h 45m 21s}  -18.86d {-18d 51' 27"}
MOON_DIST:        26.72 [deg]
MOON_ILLUM:      91 [%]
GAL_COORDS:       19.92,-33.39 [deg] galactic lon,lat of the burst
ECL_COORDS:      305.32, -5.97 [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%.