[vsnet-grb 373894] GCN/SWIFT_XRT_POSITION_UPDATE

[Bacodine]

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sat 21 Jul 18 11:16:49 UT
NOTICE_TYPE:     Swift-XRT Position UPDATE
TRIGGER_NUM:     849018,   Seg_Num: 0
GRB_RA:          347.7099d {+23h 10m 50.37s} (J2000),
                 347.9457d {+23h 11m 46.97s} (current),
                 347.0744d {+23h 08m 17.85s} (1950)
GRB_DEC:          +4.8552d {+04d 51' 18.7"} (J2000),
                  +4.9562d {+04d 57' 22.1"} (current),
                  +4.5835d {+04d 35' 00.6"} (1950)
GRB_ERROR:       2.3 [arcsec radius, statistical plus systematic, 90% containment]
GRB_INTEN:       1.00e-10 [erg/cm2/sec]
GRB_SIGNIF:      10.00 [sigma]
IMG_START_DATE:  18320 TJD;   202 DOY;   18/07/21
IMG_START_TIME:  40107.00 SOD {11:08:27.00} UT,   98.6 [sec] since BAT Trigger Time
TAM[0-3]:        100.00 100.00 100.00 100.00
AMPLIFIER:       1
WAVEFORM:        31
SUN_POSTN:       120.79d {+08h 03m 08s}  +20.43d {+20d 25' 33"}
SUN_DIST:        127.20 [deg]   Sun_angle= 8.9 [hr] (West of Sun)
MOON_POSTN:      227.30d {+15h 09m 11s}  -12.25d {-12d 14' 48"}
MOON_DIST:       120.97 [deg]
MOON_ILLUM:      67 [%]
GAL_COORDS:       81.90,-49.83 [deg] galactic lon,lat of the burst
ECL_COORDS:      350.61,  9.32 [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%.