[vsnet-grb 175753] GCN/SWIFT_XRT_POSITION_UPDATE

[Bacodine]

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Mon 21 May 12 06:14:02 UT
NOTICE_TYPE:     Swift-XRT Position UPDATE
TRIGGER_NUM:     522578,   Seg_Num: 0
GRB_RA:          148.7247d {+09h 54m 53.92s} (J2000),
                 148.8416d {+09h 55m 21.99s} (current),
                 148.2533d {+09h 53m 00.80s} (1950)
GRB_DEC:         -49.4172d {-49d 25' 01.9"} (J2000),
                 -49.4762d {-49d 28' 34.2"} (current),
                 -49.1798d {-49d 10' 47.4"} (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:  16068 TJD;   142 DOY;   12/05/21
IMG_START_TIME:  21672.00 SOD {06:01:12.00} UT,   89.1 [sec] since BAT Trigger Time
TAM[0-3]:        100.00 100.00 100.00 100.00
AMPLIFIER:       1
WAVEFORM:        31
SUN_POSTN:        58.44d {+03h 53m 46s}  +20.27d {+20d 16' 27"}
SUN_DIST:        105.52 [deg]   Sun_angle= -6.0 [hr] (East of Sun)
MOON_POSTN:       61.46d {+04h 05m 50s}  +21.02d {+21d 01' 00"}
MOON_DIST:       104.18 [deg]
MOON_ILLUM:      0 [%]
GAL_COORDS:      275.93,  3.97 [deg] galactic lon,lat of the burst
ECL_COORDS:      179.20,-56.22 [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%.