[vsnet-grb 359124] GCN/SWIFT_XRT_POSITION_UPDATE

[Bacodine]

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sun 11 Mar 18 18:21:39 UT
NOTICE_TYPE:     Swift-XRT Position UPDATE
TRIGGER_NUM:     813721,   Seg_Num: 0
GRB_RA:            3.3875d {+00h 13m 33.00s} (J2000),
                   3.6119d {+00h 14m 26.86s} (current),
                   2.7680d {+00h 11m 04.33s} (1950)
GRB_DEC:         -54.4913d {-54d 29' 28.6"} (J2000),
                 -54.3902d {-54d 23' 24.7"} (current),
                 -54.7693d {-54d 46' 09.4"} (1950)
GRB_ERROR:       2.1 [arcsec radius, statistical plus systematic, 90% containment]
GRB_INTEN:       1.00e-10 [erg/cm2/sec]
GRB_SIGNIF:      10.00 [sigma]
IMG_START_DATE:  18188 TJD;    70 DOY;   18/03/11
IMG_START_TIME:  65329.00 SOD {18:08:49.00} UT,   299.8 [sec] since BAT Trigger Time
TAM[0-3]:        100.00 100.00 100.00 100.00
AMPLIFIER:       1
WAVEFORM:        31
SUN_POSTN:       351.85d {+23h 27m 24s}   -3.52d {-03d 30' 59"}
SUN_DIST:         51.77 [deg]   Sun_angle= -0.8 [hr] (East of Sun)
MOON_POSTN:      286.97d {+19h 07m 53s}  -19.96d {-19d 57' 33"}
MOON_DIST:        66.17 [deg]
MOON_ILLUM:      29 [%]
GAL_COORDS:      314.59,-61.77 [deg] galactic lon,lat of the burst
ECL_COORDS:      333.24,-49.51 [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%.