[vsnet-grb 478068] GCN/SWIFT_XRT_POSITION_UPDATE

[Bacodine]

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Thu 18 Mar 21 04:07:46 UT
NOTICE_TYPE:     Swift-XRT Position UPDATE
TRIGGER_NUM:     1037339,   Seg_Num: 0
GRB_RA:           33.9262d {+02h 15m 42.28s} (J2000),
                  34.1468d {+02h 16m 35.23s} (current),
                  33.4058d {+02h 13m 37.39s} (1950)
GRB_DEC:         -37.7772d {-37d 46' 37.9"} (J2000),
                 -37.6794d {-37d 40' 45.6"} (current),
                 -38.0089d {-38d 00' 32.0"} (1950)
GRB_ERROR:       3.2 [arcsec radius, statistical plus systematic, 90% containment]
GRB_INTEN:       1.00e-10 [erg/cm2/sec]
GRB_SIGNIF:      10.00 [sigma]
IMG_START_DATE:  19291 TJD;    77 DOY;   21/03/18
IMG_START_TIME:  14206.00 SOD {03:56:46.00} UT,   134.3 [sec] since BAT Trigger Time
TAM[0-3]:        100.00 100.00 100.00 100.00
AMPLIFIER:       1
WAVEFORM:        31
SUN_POSTN:       357.97d {+23h 51m 52s}   -0.88d {-00d 52' 48"}
SUN_DIST:         49.60 [deg]   Sun_angle= -2.4 [hr] (East of Sun)
MOON_POSTN:       48.41d {+03h 13m 39s}  +15.95d {+15d 56' 43"}
MOON_DIST:        55.28 [deg]
MOON_ILLUM:      20 [%]
GAL_COORDS:      249.26,-69.35 [deg] galactic lon,lat of the burst
ECL_COORDS:       13.80,-47.52 [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%.