[vsnet-grb 384392] GCN/SWIFT_XRT_POSITION_UPDATE

[Bacodine]

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Tue 23 Oct 18 02:23:11 UT
NOTICE_TYPE:     Swift-XRT Position UPDATE
TRIGGER_NUM:     868427,   Seg_Num: 0
GRB_RA:          248.3291d {+16h 33m 18.98s} (J2000),
                 248.5355d {+16h 34m 08.52s} (current),
                 247.7806d {+16h 31m 07.35s} (1950)
GRB_DEC:         +19.5700d {+19d 34' 12.0"} (J2000),
                 +19.5315d {+19d 31' 53.4"} (current),
                 +19.6740d {+19d 40' 26.5"} (1950)
GRB_ERROR:       2.1 [arcsec radius, statistical plus systematic, 90% containment]
GRB_INTEN:       1.00e-10 [erg/cm2/sec]
GRB_SIGNIF:      10.00 [sigma]
IMG_START_DATE:  18414 TJD;   296 DOY;   18/10/23
IMG_START_TIME:  7673.00 SOD {02:07:53.00} UT,   230.8 [sec] since BAT Trigger Time
TAM[0-3]:        100.00 100.00 100.00 100.00
AMPLIFIER:       1
WAVEFORM:        31
SUN_POSTN:       207.56d {+13h 50m 14s}  -11.34d {-11d 20' 27"}
SUN_DIST:         50.81 [deg]   Sun_angle= -2.7 [hr] (East of Sun)
MOON_POSTN:       11.28d {+00h 45m 06s}   -0.17d {-00d 10' 01"}
MOON_DIST:       120.71 [deg]
MOON_ILLUM:      97 [%]
GAL_COORDS:       36.95, 38.91 [deg] galactic lon,lat of the burst
ECL_COORDS:      242.56, 40.97 [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%.