[vsnet-grb 171882] GCN/SWIFT_XRT_POSITION_UPDATE

[Bacodine]

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sun 01 Apr 12 05:43:35 UT
NOTICE_TYPE:     Swift-XRT Position UPDATE
TRIGGER_NUM:     519043,   Seg_Num: 0
GRB_RA:           58.0820d {+03h 52m 19.68s} (J2000),
                  58.2205d {+03h 52m 52.93s} (current),
                  57.5167d {+03h 50m 04.01s} (1950)
GRB_DEC:         -17.6358d {-17d 38' 08.8"} (J2000),
                 -17.5998d {-17d 35' 59.3"} (current),
                 -17.7842d {-17d 47' 02.9"} (1950)
GRB_ERROR:       2.5 [arcsec radius, statistical plus systematic, 90% containment]
GRB_INTEN:       1.00e-10 [erg/cm2/sec]
GRB_SIGNIF:      10.00 [sigma]
IMG_START_DATE:  16018 TJD;    92 DOY;   12/04/01
IMG_START_TIME:  20088.00 SOD {05:34:48.00} UT,   632.1 [sec] since BAT Trigger Time
TAM[0-3]:        100.00 100.00 100.00 100.00
AMPLIFIER:       1
WAVEFORM:        31
SUN_POSTN:        10.95d {+00h 43m 47s}   +4.71d {+04d 42' 21"}
SUN_DIST:         51.70 [deg]   Sun_angle= -3.2 [hr] (East of Sun)
MOON_POSTN:      119.63d {+07h 58m 30s}  +16.50d {+16d 30' 02"}
MOON_DIST:        69.42 [deg]
MOON_ILLUM:      64 [%]
GAL_COORDS:      209.85,-47.35 [deg] galactic lon,lat of the burst
ECL_COORDS:       50.97,-36.85 [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%.