[vsnet-grb 123782] GCN/SWIFT_XRT_POSITION_UPDATE

[Bacodine]

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Tue 18 May 10 15:01:53 UT
NOTICE_TYPE:     Swift-XRT Position UPDATE
TRIGGER_NUM:     20138,   Seg_Num: 1
GRB_RA:          304.7884d {+20h 19m 09.21s} (J2000),
                 304.9430d {+20h 19m 46.31s} (current),
                 304.0426d {+20h 16m 10.21s} (1950)
GRB_DEC:         -24.5549d {-24d 33' 17.6"} (J2000),
                 -24.5219d {-24d 31' 18.7"} (current),
                 -24.7123d {-24d 42' 44.1"} (1950)
GRB_ERROR:       4.0 [arcsec radius, statistical plus systematic, 90% containment]
GRB_INTEN:       1.00e-10 [erg/cm2/sec]
GRB_SIGNIF:      10.00 [sigma]
IMG_START_DATE:  15334 TJD;   138 DOY;   10/05/18
IMG_START_TIME:  51173.00 SOD {14:12:53.00} UT,   9558.0 [sec] since BAT Trigger Time
TAM[0-3]:        100.00 100.00 100.00 100.00
AMPLIFIER:       1
WAVEFORM:        31
SUN_POSTN:        55.29d {+03h 41m 11s}  +19.62d {+19d 36' 56"}
SUN_DIST:        115.94 [deg]   Sun_angle= 7.4 [hr] (West of Sun)
MOON_POSTN:      118.22d {+07h 52m 53s}  +19.72d {+19d 42' 57"}
MOON_DIST:       172.14 [deg]
MOON_ILLUM:      24 [%]
GAL_COORDS:       18.64,-29.46 [deg] galactic lon,lat of the burst
ECL_COORDS:      301.39, -4.83 [deg] ecliptic lon,lat of the burst
COMMENTS:        SWIFT-XRT Coordinates.  
COMMENTS:        This Notice is generated as a result of an uploaded TOO -- this is not a normal BAT-detected burst.  
COMMENTS:        And the IMG_START_DATE/TIME fields are the current epoch -- not the original detection.  
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:        The probability that this is a serendipitous source in the  
COMMENTS:        SPER window is 1.1% < P(seren) < 2.8%.