[vsnet-grb 445895] GCN/SWIFT_XRT_POSITION_UPDATE

[Bacodine]

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sat 16 May 20 15:19:29 UT
NOTICE_TYPE:     Swift-XRT Position UPDATE
TRIGGER_NUM:     972614,   Seg_Num: 0
GRB_RA:          274.5009d {+18h 18m 00.21s} (J2000),
                 274.7946d {+18h 19m 10.70s} (current),
                 273.7800d {+18h 15m 07.20s} (1950)
GRB_DEC:         -16.1313d {-16d 07' 52.6"} (J2000),
                 -16.1221d {-16d 07' 19.5"} (current),
                 -16.1514d {-16d 09' 05.0"} (1950)
GRB_ERROR:       3.0 [arcsec radius, statistical plus systematic, 90% containment]
GRB_INTEN:       1.00e-10 [erg/cm2/sec]
GRB_SIGNIF:      10.00 [sigma]
IMG_START_DATE:  18985 TJD;   137 DOY;   20/05/16
IMG_START_TIME:  54274.00 SOD {15:04:34.00} UT,   65.4 [sec] since BAT Trigger Time
TAM[0-3]:        100.00 100.00 100.00 100.00
AMPLIFIER:       1
WAVEFORM:        31
SUN_POSTN:        53.90d {+03h 35m 35s}  +19.30d {+19d 18' 08"}
SUN_DIST:        141.00 [deg]   Sun_angle= 9.3 [hr] (West of Sun)
MOON_POSTN:      351.83d {+23h 27m 19s}   -9.08d {-09d 05' 02"}
MOON_DIST:        75.13 [deg]
MOON_ILLUM:      31 [%]
GAL_COORDS:       14.82, -0.14 [deg] galactic lon,lat of the burst
ECL_COORDS:      274.36,  7.24 [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%.