[vsnet-grb 325641] GCN/SWIFT_XRT_POSITION_UPDATE

[Bacodine]

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Tue 16 May 17 07:16:08 UT
NOTICE_TYPE:     Swift-XRT Position UPDATE
TRIGGER_NUM:     753085,   Seg_Num: 0
GRB_RA:          251.7905d {+16h 47m 09.72s} (J2000),
                 252.1079d {+16h 48m 25.90s} (current),
                 250.8785d {+16h 43m 30.83s} (1950)
GRB_DEC:         -45.8718d {-45d 52' 18.4"} (J2000),
                 -45.9018d {-45d 54' 06.3"} (current),
                 -45.7827d {-45d 46' 57.7"} (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:  17889 TJD;   136 DOY;   17/05/16
IMG_START_TIME:  25818.00 SOD {07:10:18.00} UT,   76.1 [sec] since BAT Trigger Time
TAM[0-3]:        100.00 100.00 100.00 100.00
AMPLIFIER:       1
WAVEFORM:        31
SUN_POSTN:        53.29d {+03h 33m 10s}  +19.16d {+19d 09' 50"}
SUN_DIST:        149.09 [deg]   Sun_angle= 10.7 [hr] (West of Sun)
MOON_POSTN:      295.95d {+19h 43m 47s}  -18.45d {-18d 26' 44"}
MOON_DIST:        45.30 [deg]
MOON_ILLUM:      76 [%]
GAL_COORDS:      339.54, -0.43 [deg] galactic lon,lat of the burst
ECL_COORDS:      256.30,-23.29 [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:        This is 5.4" from the X-ray source: X164710.20-455217.0  
COMMENTS:        in the CHANDRA CXOXASSIST catalogue.