[vsnet-grb 338133] GCN/SWIFT_XRT_POSITION_UPDATE

[Bacodine]

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sun 03 Sep 17 13:50:42 UT
NOTICE_TYPE:     Swift-XRT Position UPDATE
TRIGGER_NUM:     770528,   Seg_Num: 0
GRB_RA:          254.5251d {+16h 58m 06.02s} (J2000),
                 254.6852d {+16h 58m 44.44s} (current),
                 254.0724d {+16h 56m 17.36s} (1950)
GRB_DEC:         +34.9793d {+34d 58' 45.4"} (J2000),
                 +34.9532d {+34d 57' 11.4"} (current),
                 +35.0546d {+35d 03' 16.7"} (1950)
GRB_ERROR:       3.5 [arcsec radius, statistical plus systematic, 90% containment]
GRB_INTEN:       1.00e-10 [erg/cm2/sec]
GRB_SIGNIF:      10.00 [sigma]
IMG_START_DATE:  17999 TJD;   246 DOY;   17/09/03
IMG_START_TIME:  49606.00 SOD {13:46:46.00} UT,   3458.8 [sec] since BAT Trigger Time
TAM[0-3]:        100.00 100.00 100.00 100.00
AMPLIFIER:       1
WAVEFORM:        31
SUN_POSTN:       162.70d {+10h 50m 49s}   +7.34d {+07d 20' 37"}
SUN_DIST:         87.41 [deg]   Sun_angle= -6.1 [hr] (East of Sun)
MOON_POSTN:      311.18d {+20h 44m 44s}  -16.55d {-16d 33' 13"}
MOON_DIST:        74.31 [deg]
MOON_ILLUM:      92 [%]
GAL_COORDS:       57.71, 37.41 [deg] galactic lon,lat of the burst
ECL_COORDS:      246.23, 57.15 [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 0.58% < P(seren) < 1.1%.