[vsnet-grb 205515] GCN/SWIFT_XRT_POSITION_UPDATE

[Bacodine]

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sat 15 Jun 13 10:03:01 UT
NOTICE_TYPE:     Swift-XRT Position UPDATE
TRIGGER_NUM:     558271,   Seg_Num: 0
GRB_RA:          274.8292d {+18h 19m 19.00s} (J2000),
                 275.1877d {+18h 20m 45.05s} (current),
                 273.4955d {+18h 13m 58.91s} (1950)
GRB_DEC:         -68.1611d {-68d 09' 39.9"} (J2000),
                 -68.1546d {-68d 09' 16.4"} (current),
                 -68.1813d {-68d 10' 52.7"} (1950)
GRB_ERROR:       2.3 [arcsec radius, statistical plus systematic, 90% containment]
GRB_INTEN:       1.00e-10 [erg/cm2/sec]
GRB_SIGNIF:      10.00 [sigma]
IMG_START_DATE:  16458 TJD;   166 DOY;   13/06/15
IMG_START_TIME:  35692.00 SOD {09:54:52.00} UT,   606.7 [sec] since BAT Trigger Time
TAM[0-3]:        100.00 100.00 100.00 100.00
AMPLIFIER:       1
WAVEFORM:        31
SUN_POSTN:        83.98d {+05h 35m 55s}  +23.32d {+23d 19' 18"}
SUN_DIST:        134.64 [deg]   Sun_angle= 11.3 [hr] (West of Sun)
MOON_POSTN:      158.83d {+10h 35m 18s}   +3.75d {+03d 44' 60"}
MOON_DIST:       103.04 [deg]
MOON_ILLUM:      37 [%]
GAL_COORDS:      326.37,-22.15 [deg] galactic lon,lat of the burst
ECL_COORDS:      272.53,-44.76 [deg] ecliptic lon,lat of the burst
COMMENTS:        SWIFT-XRT Coordinates.  
COMMENTS:        There is a bright star (mag=6.33) 8.32 arcmin from the XRT position.  
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%.