[vsnet-grb 122120] GCN/SWIFT_XRT_POSITION_UPDATE

[Bacodine]

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sun 25 Apr 10 03:06:45 UT
NOTICE_TYPE:     Swift-XRT Position UPDATE
TRIGGER_NUM:     420398,   Seg_Num: 0
GRB_RA:          299.1965d {+19h 56m 47.16s} (J2000),
                 299.3535d {+19h 57m 24.84s} (current),
                 298.4344d {+19h 53m 44.25s} (1950)
GRB_DEC:         -26.4301d {-26d 25' 48.3"} (J2000),
                 -26.4020d {-26d 24' 07.2"} (current),
                 -26.5643d {-26d 33' 51.4"} (1950)
GRB_ERROR:       3.1 [arcsec radius, statistical plus systematic, 90% containment]
GRB_INTEN:       1.00e-10 [erg/cm2/sec]
GRB_SIGNIF:      10.00 [sigma]
IMG_START_DATE:  15311 TJD;   115 DOY;   10/04/25
IMG_START_TIME:  10442.00 SOD {02:54:02.00} UT,   196.9 [sec] since BAT Trigger Time
TAM[0-3]:        100.00 100.00 100.00 100.00
AMPLIFIER:       1
WAVEFORM:        31
SUN_POSTN:        32.54d {+02h 10m 10s}  +13.13d {+13d 07' 34"}
SUN_DIST:         98.60 [deg]   Sun_angle= 6.2 [hr] (West of Sun)
MOON_POSTN:      168.77d {+11h 15m 05s}   -0.19d {-00d 11' 15"}
MOON_DIST:       125.54 [deg]
MOON_ILLUM:      85 [%]
GAL_COORDS:       14.81,-25.29 [deg] galactic lon,lat of the burst
ECL_COORDS:      296.03, -5.59 [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%.