[vsnet-grb 376369] GCN/SWIFT_XRT_POSITION_UPDATE

[Bacodine]

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sun 12 Aug 18 08:35:29 UT
NOTICE_TYPE:     Swift-XRT Position UPDATE
TRIGGER_NUM:     852903,   Seg_Num: 0
GRB_RA:          245.8360d {+16h 23m 20.64s} (J2000),
                 245.7304d {+16h 22m 55.29s} (current),
                 246.1264d {+16h 24m 30.33s} (1950)
GRB_DEC:         +74.6646d {+74d 39' 52.5"} (J2000),
                 +74.6221d {+74d 37' 19.5"} (current),
                 +74.7779d {+74d 46' 40.5"} (1950)
GRB_ERROR:       2.7 [arcsec radius, statistical plus systematic, 90% containment]
GRB_INTEN:       1.00e-10 [erg/cm2/sec]
GRB_SIGNIF:      10.00 [sigma]
IMG_START_DATE:  18342 TJD;   224 DOY;   18/08/12
IMG_START_TIME:  30265.00 SOD {08:24:25.00} UT,   114.8 [sec] since BAT Trigger Time
TAM[0-3]:        100.00 100.00 100.00 100.00
AMPLIFIER:       1
WAVEFORM:        31
SUN_POSTN:       142.02d {+09h 28m 05s}  +14.94d {+14d 56' 12"}
SUN_DIST:         79.18 [deg]   Sun_angle= -6.9 [hr] (East of Sun)
MOON_POSTN:      155.62d {+10h 22m 28s}  +12.68d {+12d 40' 39"}
MOON_DIST:        77.81 [deg]
MOON_ILLUM:      1 [%]
GAL_COORDS:      107.89, 35.55 [deg] galactic lon,lat of the burst
ECL_COORDS:      123.72, 78.75 [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%.