[vsnet-grb 146344] GCN/SWIFT_XRT_POSITION_UPDATE

[Bacodine]

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Thu 07 Apr 11 14:24:43 UT
NOTICE_TYPE:     Swift-XRT Position UPDATE
TRIGGER_NUM:     450884,   Seg_Num: 0
GRB_RA:          186.0309d {+12h 24m 07.41s} (J2000),
                 186.1733d {+12h 24m 41.60s} (current),
                 185.3983d {+12h 21m 35.58s} (1950)
GRB_DEC:         +15.7118d {+15d 42' 42.4"} (J2000),
                 +15.6494d {+15d 38' 58.0"} (current),
                 +15.9888d {+15d 59' 19.7"} (1950)
GRB_ERROR:       2.4 [arcsec radius, statistical plus systematic, 90% containment]
GRB_INTEN:       1.00e-10 [erg/cm2/sec]
GRB_SIGNIF:      10.00 [sigma]
IMG_START_DATE:  15658 TJD;    97 DOY;   11/04/07
IMG_START_TIME:  51485.00 SOD {14:18:05.00} UT,   683.8 [sec] since BAT Trigger Time
TAM[0-3]:        100.00 100.00 100.00 100.00
AMPLIFIER:       1
WAVEFORM:        31
SUN_POSTN:        16.07d {+01h 04m 16s}   +6.84d {+06d 50' 25"}
SUN_DIST:        155.47 [deg]   Sun_angle= -11.3 [hr] (East of Sun)
MOON_POSTN:       58.94d {+03h 55m 45s}  +22.50d {+22d 29' 53"}
MOON_DIST:       115.79 [deg]
MOON_ILLUM:      14 [%]
GAL_COORDS:      272.50, 76.94 [deg] galactic lon,lat of the burst
ECL_COORDS:      179.11, 16.78 [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%.