[vsnet-grb 322075] GCN/SWIFT_XRT_POSITION_UPDATE

[Bacodine]

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Wed 19 Apr 17 13:42:48 UT
NOTICE_TYPE:     Swift-XRT Position UPDATE
TRIGGER_NUM:     748898,   Seg_Num: 0
GRB_RA:           79.8549d {+05h 19m 25.17s} (J2000),
                  80.0393d {+05h 20m 09.44s} (current),
                  79.3220d {+05h 17m 17.27s} (1950)
GRB_DEC:         -21.4242d {-21d 25' 27.1"} (J2000),
                 -21.4074d {-21d 24' 26.6"} (current),
                 -21.4745d {-21d 28' 28.2"} (1950)
GRB_ERROR:       3.6 [arcsec radius, statistical plus systematic, 90% containment]
GRB_INTEN:       1.00e-10 [erg/cm2/sec]
GRB_SIGNIF:      10.00 [sigma]
IMG_START_DATE:  17862 TJD;   109 DOY;   17/04/19
IMG_START_TIME:  48965.00 SOD {13:36:05.00} UT,   564.8 [sec] since BAT Trigger Time
TAM[0-3]:        100.00 100.00 100.00 100.00
AMPLIFIER:       1
WAVEFORM:        31
SUN_POSTN:        27.62d {+01h 50m 28s}  +11.36d {+11d 21' 46"}
SUN_DIST:         61.00 [deg]   Sun_angle= -3.5 [hr] (East of Sun)
MOON_POSTN:      302.93d {+20h 11m 43s}  -17.39d {-17d 23' 23"}
MOON_DIST:       122.81 [deg]
MOON_ILLUM:      49 [%]
GAL_COORDS:      223.46,-29.36 [deg] galactic lon,lat of the burst
ECL_COORDS:       76.73,-44.40 [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%.