[vsnet-grb 149514] GCN/SWIFT_XRT_POSITION_UPDATE

[Bacodine]

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sat 21 May 11 16:03:55 UT
NOTICE_TYPE:     Swift-XRT Position UPDATE
TRIGGER_NUM:     453788,   Seg_Num: 0
GRB_RA:          120.1326d {+08h 00m 31.82s} (J2000),
                 120.3348d {+08h 01m 20.35s} (current),
                 119.2425d {+07h 56m 58.21s} (1950)
GRB_DEC:         +45.8263d {+45d 49' 34.6"} (J2000),
                 +45.7944d {+45d 47' 39.7"} (current),
                 +45.9642d {+45d 57' 51.0"} (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:  15702 TJD;   141 DOY;   11/05/21
IMG_START_TIME:  57228.00 SOD {15:53:48.00} UT,   136.6 [sec] since BAT Trigger Time
TAM[0-3]:        100.00 100.00 100.00 100.00
AMPLIFIER:       1
WAVEFORM:        31
SUN_POSTN:        58.09d {+03h 52m 22s}  +20.20d {+20d 12' 15"}
SUN_DIST:         56.47 [deg]   Sun_angle= -4.1 [hr] (East of Sun)
MOON_POSTN:      295.87d {+19h 43m 30s}  -18.58d {-18d 34' 53"}
MOON_DIST:       152.54 [deg]
MOON_ILLUM:      79 [%]
GAL_COORDS:      173.67, 30.74 [deg] galactic lon,lat of the burst
ECL_COORDS:      112.65, 24.73 [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%.