[vsnet-grb 377117] GCN/SWIFT_XRT_POSITION_UPDATE

[Bacodine]

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sat 18 Aug 18 03:24:31 UT
NOTICE_TYPE:     Swift-XRT Position UPDATE
TRIGGER_NUM:     853824,   Seg_Num: 0
GRB_RA:          169.6364d {+11h 18m 32.73s} (J2000),
                 169.8543d {+11h 19m 25.02s} (current),
                 169.0535d {+11h 16m 12.83s} (1950)
GRB_DEC:         -48.3444d {-48d 20' 39.8"} (J2000),
                 -48.4464d {-48d 26' 47.2"} (current),
                 -48.0708d {-48d 04' 14.8"} (1950)
GRB_ERROR:       2.4 [arcsec radius, statistical plus systematic, 90% containment]
GRB_INTEN:       1.00e-10 [erg/cm2/sec]
GRB_SIGNIF:      10.00 [sigma]
IMG_START_DATE:  18348 TJD;   230 DOY;   18/08/18
IMG_START_TIME:  11633.00 SOD {03:13:53.00} UT,   109.0 [sec] since BAT Trigger Time
TAM[0-3]:        100.00 100.00 100.00 100.00
AMPLIFIER:       1
WAVEFORM:        31
SUN_POSTN:       147.44d {+09h 49m 45s}  +13.13d {+13d 07' 59"}
SUN_DIST:         64.71 [deg]   Sun_angle= -1.5 [hr] (East of Sun)
MOON_POSTN:      232.16d {+15h 28m 37s}  -13.67d {-13d 40' 01"}
MOON_DIST:        61.55 [deg]
MOON_ILLUM:      48 [%]
GAL_COORDS:      287.41, 11.71 [deg] galactic lon,lat of the burst
ECL_COORDS:      196.00,-47.14 [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%.