[vsnet-grb 289707] GCN/SWIFT_XRT_POSITION_UPDATE

[Bacodine]

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sun 24 Apr 16 13:09:46 UT
NOTICE_TYPE:     Swift-XRT Position UPDATE
TRIGGER_NUM:     683906,   Seg_Num: 0
GRB_RA:          319.4850d {+21h 17m 56.40s} (J2000),
                 319.7974d {+21h 19m 11.38s} (current),
                 318.5214d {+21h 14m 05.14s} (1950)
GRB_DEC:         -60.4147d {-60d 24' 52.9"} (J2000),
                 -60.3455d {-60d 20' 43.7"} (current),
                 -60.6248d {-60d 37' 29.3"} (1950)
GRB_ERROR:       3.8 [arcsec radius, statistical plus systematic, 90% containment]
GRB_INTEN:       1.00e-10 [erg/cm2/sec]
GRB_SIGNIF:      10.00 [sigma]
IMG_START_DATE:  17502 TJD;   115 DOY;   16/04/24
IMG_START_TIME:  45641.00 SOD {12:40:41.00} UT,   3093.7 [sec] since BAT Trigger Time
TAM[0-3]:        100.00 100.00 100.00 100.00
AMPLIFIER:       1
WAVEFORM:        31
SUN_POSTN:        32.51d {+02h 10m 02s}  +13.11d {+13d 06' 53"}
SUN_DIST:         93.09 [deg]   Sun_angle= 4.8 [hr] (West of Sun)
MOON_POSTN:      239.05d {+15h 56m 12s}  -15.48d {-15d 28' 45"}
MOON_DIST:        72.02 [deg]
MOON_ILLUM:      95 [%]
GAL_COORDS:      334.71,-41.20 [deg] galactic lon,lat of the burst
ECL_COORDS:      300.38,-42.09 [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:        The probability that this is a serendipitous source in the  
COMMENTS:        SPER window is 0.58% < P(seren) < 1.1%.