[vsnet-grb 122079] GCN/SWIFT_XRT_POSITION_UPDATE

[Bacodine]

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sat 24 Apr 10 17:17:38 UT
NOTICE_TYPE:     Swift-XRT Position UPDATE
TRIGGER_NUM:     420367,   Seg_Num: 0
GRB_RA:          209.4478d {+13h 57m 47.47s} (J2000),
                 209.5792d {+13h 58m 19.00s} (current),
                 208.8112d {+13h 55m 14.68s} (1950)
GRB_DEC:          +1.5384d {+01d 32' 18.2"} (J2000),
                  +1.4884d {+01d 29' 18.3"} (current),
                  +1.7816d {+01d 46' 53.7"} (1950)
GRB_ERROR:       2.2 [arcsec radius, statistical plus systematic, 90% containment]
GRB_INTEN:       1.00e-10 [erg/cm2/sec]
GRB_SIGNIF:      10.00 [sigma]
IMG_START_DATE:  15310 TJD;   114 DOY;   10/04/24
IMG_START_TIME:  60202.00 SOD {16:43:22.00} UT,   639.7 [sec] since BAT Trigger Time
TAM[0-3]:        100.00 100.00 100.00 100.00
AMPLIFIER:       1
WAVEFORM:        31
SUN_POSTN:        32.15d {+02h 08m 37s}  +12.99d {+12d 59' 32"}
SUN_DIST:        165.30 [deg]   Sun_angle= -11.8 [hr] (East of Sun)
MOON_POSTN:      163.42d {+10h 53m 41s}   +2.31d {+02d 18' 30"}
MOON_DIST:        46.14 [deg]
MOON_ILLUM:      82 [%]
GAL_COORDS:      337.58, 59.87 [deg] galactic lon,lat of the burst
ECL_COORDS:      206.83, 12.72 [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%.