[vsnet-grb 158478] GCN/SWIFT_XRT_POSITION_UPDATE

[Bacodine]

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Mon 19 Sep 11 21:32:49 UT
NOTICE_TYPE:     Swift-XRT Position UPDATE
TRIGGER_NUM:     503525,   Seg_Num: 0
GRB_RA:          251.7923d {+16h 47m 10.15s} (J2000),
                 252.0064d {+16h 48m 01.52s} (current),
                 250.8803d {+16h 43m 31.26s} (1950)
GRB_DEC:         -45.8714d {-45d 52' 17.0"} (J2000),
                 -45.8917d {-45d 53' 29.9"} (current),
                 -45.7823d {-45d 46' 56.2"} (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:  15823 TJD;   262 DOY;   11/09/19
IMG_START_TIME:  76686.00 SOD {21:18:06.00} UT,   85941.7 [sec] since BAT Trigger Time
TAM[0-3]:        100.00 100.00 100.00 100.00
AMPLIFIER:       1
WAVEFORM:        31
SUN_POSTN:       176.87d {+11h 47m 30s}   +1.35d {+01d 21' 14"}
SUN_DIST:         80.70 [deg]   Sun_angle= -5.0 [hr] (East of Sun)
MOON_POSTN:       77.88d {+05h 11m 30s}  +22.82d {+22d 49' 02"}
MOON_DIST:       156.44 [deg]
MOON_ILLUM:      57 [%]
GAL_COORDS:      339.55, -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 0.6" from the X-ray source: 2XMMi J164710.1-455216  
COMMENTS:        in the XMM-NEWTON XMMSSC catalogue.