[vsnet-grb 143215] GCN/SWIFT_XRT_POSITION_UPDATE

[Bacodine]

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Wed 23 Feb 11 21:10:17 UT
NOTICE_TYPE:     Swift-XRT Position UPDATE
TRIGGER_NUM:     446674,   Seg_Num: 0
GRB_RA:          345.8575d {+23h 03m 25.80s} (J2000),
                 345.6378d {+23h 02m 33.07s} (current),
                 346.6777d {+23h 06m 42.65s} (1950)
GRB_DEC:         +87.5571d {+87d 33' 25.5"} (J2000),
                 +87.6172d {+87d 37' 02.0"} (current),
                 +87.2866d {+87d 17' 11.6"} (1950)
GRB_ERROR:       2.3 [arcsec radius, statistical plus systematic, 90% containment]
GRB_INTEN:       1.00e-10 [erg/cm2/sec]
GRB_SIGNIF:      10.00 [sigma]
IMG_START_DATE:  15615 TJD;    54 DOY;   11/02/23
IMG_START_TIME:  75560.00 SOD {20:59:20.00} UT,   140.8 [sec] since BAT Trigger Time
TAM[0-3]:        100.00 100.00 100.00 100.00
AMPLIFIER:       1
WAVEFORM:        31
SUN_POSTN:       336.74d {+22h 26m 58s}   -9.71d {-09d 42' 48"}
SUN_DIST:         97.36 [deg]   Sun_angle= -0.6 [hr] (East of Sun)
MOON_POSTN:      227.57d {+15h 10m 16s}  -21.23d {-21d 13' 34"}
MOON_DIST:       112.33 [deg]
MOON_ILLUM:      62 [%]
GAL_COORDS:      121.71, 24.95 [deg] galactic lon,lat of the burst
ECL_COORDS:       83.92, 67.04 [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%.