[vsnet-grb 381180] GCN/SWIFT_XRT_POSITION_UPDATE

[Bacodine]

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Mon 24 Sep 18 15:35:16 UT
NOTICE_TYPE:     Swift-XRT Position UPDATE
TRIGGER_NUM:     863186,   Seg_Num: 0
GRB_RA:           49.2002d {+03h 16m 48.04s} (J2000),
                  49.3113d {+03h 17m 14.70s} (current),
                  48.9045d {+03h 15m 37.07s} (1950)
GRB_DEC:         -58.5320d {-58d 31' 55.1"} (J2000),
                 -58.4639d {-58d 27' 50.1"} (current),
                 -58.7145d {-58d 42' 52.0"} (1950)
GRB_ERROR:       2.2 [arcsec radius, statistical plus systematic, 90% containment]
GRB_INTEN:       1.00e-10 [erg/cm2/sec]
GRB_SIGNIF:      10.00 [sigma]
IMG_START_DATE:  18385 TJD;   267 DOY;   18/09/24
IMG_START_TIME:  55568.00 SOD {15:26:08.00} UT,   225.6 [sec] since BAT Trigger Time
TAM[0-3]:        100.00 100.00 100.00 100.00
AMPLIFIER:       1
WAVEFORM:        31
SUN_POSTN:       181.41d {+12h 05m 39s}   -0.61d {-00d 36' 45"}
SUN_DIST:        109.97 [deg]   Sun_angle= 8.8 [hr] (West of Sun)
MOON_POSTN:      358.09d {+23h 52m 22s}   -5.10d {-05d 05' 41"}
MOON_DIST:        66.30 [deg]
MOON_ILLUM:      100 [%]
GAL_COORDS:      274.33,-49.74 [deg] galactic lon,lat of the burst
ECL_COORDS:        3.91,-70.01 [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 0.11% < P(seren) < 0.58%.