[vsnet-grb 357487] GCN/SWIFT_XRT_POSITION_UPDATE

[Bacodine]

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sat 24 Feb 18 22:34:53 UT
NOTICE_TYPE:     Swift-XRT Position UPDATE
TRIGGER_NUM:     811561,   Seg_Num: 0
GRB_RA:          202.6838d {+13h 30m 44.11s} (J2000),
                 202.8858d {+13h 31m 32.58s} (current),
                 202.1268d {+13h 28m 30.43s} (1950)
GRB_DEC:         +38.0788d {+38d 04' 43.6"} (J2000),
                 +37.9856d {+37d 59' 08.2"} (current),
                 +38.3362d {+38d 20' 10.2"} (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:  18173 TJD;    55 DOY;   18/02/24
IMG_START_TIME:  80604.00 SOD {22:23:24.00} UT,   136.3 [sec] since BAT Trigger Time
TAM[0-3]:        100.00 100.00 100.00 100.00
AMPLIFIER:       1
WAVEFORM:        31
SUN_POSTN:       338.03d {+22h 32m 08s}   -9.21d {-09d 12' 36"}
SUN_DIST:        130.55 [deg]   Sun_angle= 9.0 [hr] (West of Sun)
MOON_POSTN:       87.29d {+05h 49m 09s}  +19.64d {+19d 38' 06"}
MOON_DIST:        96.54 [deg]
MOON_ILLUM:      68 [%]
GAL_COORDS:       88.40, 76.29 [deg] galactic lon,lat of the burst
ECL_COORDS:      182.62, 43.36 [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%.