[vsnet-grb 381378] GCN/SWIFT_XRT_POSITION_UPDATE

[Bacodine]

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Tue 25 Sep 18 14:55:35 UT
NOTICE_TYPE:     Swift-XRT Position UPDATE
TRIGGER_NUM:     863421,   Seg_Num: 0
GRB_RA:          315.2038d {+21h 00m 48.91s} (J2000),
                 315.5968d {+21h 02m 23.23s} (current),
                 314.1472d {+20h 56m 35.33s} (1950)
GRB_DEC:         -64.4569d {-64d 27' 24.8"} (J2000),
                 -64.3826d {-64d 22' 57.5"} (current),
                 -64.6527d {-64d 39' 09.5"} (1950)
GRB_ERROR:       2.5 [arcsec radius, statistical plus systematic, 90% containment]
GRB_INTEN:       1.00e-10 [erg/cm2/sec]
GRB_SIGNIF:      10.00 [sigma]
IMG_START_DATE:  18386 TJD;   268 DOY;   18/09/25
IMG_START_TIME:  52960.00 SOD {14:42:40.00} UT,   308.1 [sec] since BAT Trigger Time
TAM[0-3]:        100.00 100.00 100.00 100.00
AMPLIFIER:       1
WAVEFORM:        31
SUN_POSTN:       182.29d {+12h 09m 09s}   -0.99d {-00d 59' 29"}
SUN_DIST:        106.31 [deg]   Sun_angle= -8.9 [hr] (East of Sun)
MOON_POSTN:        9.56d {+00h 38m 14s}   -0.79d {-00d 47' 20"}
MOON_DIST:        74.53 [deg]
MOON_ILLUM:      100 [%]
GAL_COORDS:      330.50,-38.08 [deg] galactic lon,lat of the burst
ECL_COORDS:      295.63,-44.99 [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 1.1% < P(seren) < 2.8%.