[vsnet-grb 418077] GCN/SWIFT_XRT_POSITION_UPDATE

[Bacodine]

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Wed 28 Aug 19 13:13:07 UT
NOTICE_TYPE:     Swift-XRT Position UPDATE
TRIGGER_NUM:     922808,   Seg_Num: 0
GRB_RA:          251.8315d {+16h 47m 19.56s} (J2000),
                 252.0297d {+16h 48m 07.13s} (current),
                 251.3275d {+16h 45m 18.58s} (1950)
GRB_DEC:         +27.2808d {+27d 16' 50.8"} (J2000),
                 +27.2469d {+27d 14' 48.6"} (current),
                 +27.3688d {+27d 22' 07.5"} (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:  18723 TJD;   240 DOY;   19/08/28
IMG_START_TIME:  46952.00 SOD {13:02:32.00} UT,   152.6 [sec] since BAT Trigger Time
TAM[0-3]:        100.00 100.00 100.00 100.00
AMPLIFIER:       1
WAVEFORM:        31
SUN_POSTN:       156.80d {+10h 27m 11s}   +9.69d {+09d 41' 31"}
SUN_DIST:         90.16 [deg]   Sun_angle= -6.3 [hr] (East of Sun)
MOON_POSTN:      131.07d {+08h 44m 17s}  +20.12d {+20d 07' 08"}
MOON_DIST:       105.78 [deg]
MOON_ILLUM:      5 [%]
GAL_COORDS:       47.58, 38.08 [deg] galactic lon,lat of the burst
ECL_COORDS:      244.93, 49.15 [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%.