[vsnet-grb 326926] GCN/SWIFT_XRT_POSITION_UPDATE

[Bacodine]

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Fri 26 May 17 13:50:15 UT
NOTICE_TYPE:     Swift-XRT Position UPDATE
TRIGGER_NUM:     754549,   Seg_Num: 0
GRB_RA:            4.7073d {+00h 18m 49.75s} (J2000),
                   4.9304d {+00h 19m 43.30s} (current),
                   4.0664d {+00h 16m 15.92s} (1950)
GRB_DEC:          +1.2773d {+01d 16' 38.2"} (J2000),
                  +1.3738d {+01d 22' 25.7"} (current),
                  +0.9997d {+00d 59' 58.9"} (1950)
GRB_ERROR:       4.9 [arcsec radius, statistical plus systematic, 90% containment]
GRB_INTEN:       1.00e-10 [erg/cm2/sec]
GRB_SIGNIF:      10.00 [sigma]
IMG_START_DATE:  17899 TJD;   146 DOY;   17/05/26
IMG_START_TIME:  49041.00 SOD {13:37:21.00} UT,   132.1 [sec] since BAT Trigger Time
TAM[0-3]:        100.00 100.00 100.00 100.00
AMPLIFIER:       1
WAVEFORM:        31
SUN_POSTN:        63.60d {+04h 14m 23s}  +21.22d {+21d 13' 10"}
SUN_DIST:         60.44 [deg]   Sun_angle= 3.9 [hr] (West of Sun)
MOON_POSTN:       75.70d {+05h 02m 49s}  +18.04d {+18d 02' 13"}
MOON_DIST:        71.31 [deg]
MOON_ILLUM:      1 [%]
GAL_COORDS:      106.18,-60.53 [deg] galactic lon,lat of the burst
ECL_COORDS:        4.83, -0.70 [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%.