[vsnet-grb 370517] GCN/SWIFT_XRT_POSITION_UPDATE

[Bacodine]

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Wed 20 Jun 18 08:54:51 UT
NOTICE_TYPE:     Swift-XRT Position UPDATE
TRIGGER_NUM:     843122,   Seg_Num: 0
GRB_RA:          279.8958d {+18h 39m 34.99s} (J2000),
                 280.0889d {+18h 40m 21.33s} (current),
                 279.3730d {+18h 37m 29.52s} (1950)
GRB_DEC:         +23.2439d {+23d 14' 38.0"} (J2000),
                 +23.2617d {+23d 15' 42.2"} (current),
                 +23.1973d {+23d 11' 50.3"} (1950)
GRB_ERROR:       2.0 [arcsec radius, statistical plus systematic, 90% containment]
GRB_INTEN:       1.00e-10 [erg/cm2/sec]
GRB_SIGNIF:      10.00 [sigma]
IMG_START_DATE:  18289 TJD;   171 DOY;   18/06/20
IMG_START_TIME:  31188.00 SOD {08:39:48.00} UT,   290.0 [sec] since BAT Trigger Time
TAM[0-3]:        100.00 100.00 100.00 100.00
AMPLIFIER:       1
WAVEFORM:        31
SUN_POSTN:        88.91d {+05h 55m 39s}  +23.43d {+23d 25' 57"}
SUN_DIST:        132.06 [deg]   Sun_angle= 11.3 [hr] (West of Sun)
MOON_POSTN:      179.83d {+11h 59m 19s}   +4.46d {+04d 27' 19"}
MOON_DIST:        97.61 [deg]
MOON_ILLUM:      49 [%]
GAL_COORDS:       52.69, 12.84 [deg] galactic lon,lat of the burst
ECL_COORDS:      283.20, 46.23 [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%.