[vsnet-grb 150172] GCN/SWIFT_XRT_POSITION_UPDATE

[Bacodine]

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Mon 30 May 11 15:52:58 UT
NOTICE_TYPE:     Swift-XRT Position UPDATE
TRIGGER_NUM:     454473,   Seg_Num: 0
GRB_RA:          282.0692d {+18h 48m 16.60s} (J2000),
                 282.0989d {+18h 48m 23.73s} (current),
                 281.9387d {+18h 47m 45.28s} (1950)
GRB_DEC:         +61.9286d {+61d 55' 42.9"} (J2000),
                 +61.9419d {+61d 56' 30.8"} (current),
                 +61.8707d {+61d 52' 14.5"} (1950)
GRB_ERROR:       2.2 [arcsec radius, statistical plus systematic, 90% containment]
GRB_INTEN:       1.00e-10 [erg/cm2/sec]
GRB_SIGNIF:      10.00 [sigma]
IMG_START_DATE:  15711 TJD;   150 DOY;   11/05/30
IMG_START_TIME:  56314.00 SOD {15:38:34.00} UT,   451.3 [sec] since BAT Trigger Time
TAM[0-3]:        100.00 100.00 100.00 100.00
AMPLIFIER:       1
WAVEFORM:        31
SUN_POSTN:        67.19d {+04h 28m 46s}  +21.78d {+21d 46' 56"}
SUN_DIST:         91.76 [deg]   Sun_angle= 9.7 [hr] (West of Sun)
MOON_POSTN:       40.02d {+02h 40m 04s}  +19.19d {+19d 11' 23"}
MOON_DIST:        85.29 [deg]
MOON_ILLUM:      5 [%]
GAL_COORDS:       91.91, 24.09 [deg] galactic lon,lat of the burst
ECL_COORDS:      324.10, 83.02 [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%.