[vsnet-grb 319641] GCN/SWIFT_XRT_POSITION_UPDATE

[Bacodine]

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Fri 31 Mar 17 02:03:36 UT
NOTICE_TYPE:     Swift-XRT Position UPDATE
TRIGGER_NUM:     744791,   Seg_Num: 0
GRB_RA:          323.7921d {+21h 35m 10.10s} (J2000),
                 324.0386d {+21h 36m 09.27s} (current),
                 323.0760d {+21h 32m 18.24s} (1950)
GRB_DEC:         -24.3857d {-24d 23' 08.5"} (J2000),
                 -24.3081d {-24d 18' 29.2"} (current),
                 -24.6093d {-24d 36' 33.5"} (1950)
GRB_ERROR:       2.1 [arcsec radius, statistical plus systematic, 90% containment]
GRB_INTEN:       1.00e-10 [erg/cm2/sec]
GRB_SIGNIF:      10.00 [sigma]
IMG_START_DATE:  17843 TJD;    90 DOY;   17/03/31
IMG_START_TIME:  6188.00 SOD {01:43:08.00} UT,   141.6 [sec] since BAT Trigger Time
TAM[0-3]:        100.00 100.00 100.00 100.00
AMPLIFIER:       1
WAVEFORM:        31
SUN_POSTN:         9.70d {+00h 38m 49s}   +4.18d {+04d 10' 44"}
SUN_DIST:         52.76 [deg]   Sun_angle= 3.0 [hr] (West of Sun)
MOON_POSTN:       49.96d {+03h 19m 51s}  +13.16d {+13d 09' 19"}
MOON_DIST:        91.75 [deg]
MOON_ILLUM:      12 [%]
GAL_COORDS:       25.04,-46.00 [deg] galactic lon,lat of the burst
ECL_COORDS:      318.17, -9.49 [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%.