[vsnet-grb 397471] GCN/SWIFT_XRT_POSITION_UPDATE

[Bacodine]

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Tue 19 Feb 19 19:59:43 UT
NOTICE_TYPE:     Swift-XRT Position UPDATE
TRIGGER_NUM:     889748,   Seg_Num: 0
GRB_RA:          189.6260d {+12h 38m 30.24s} (J2000),
                 189.7960d {+12h 39m 11.03s} (current),
                 189.1787d {+12h 36m 42.87s} (1950)
GRB_DEC:         +76.6127d {+76d 36' 45.7"} (J2000),
                 +76.5077d {+76d 30' 27.6"} (current),
                 +76.8874d {+76d 53' 14.5"} (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:  18533 TJD;    50 DOY;   19/02/19
IMG_START_TIME:  71012.00 SOD {19:43:32.00} UT,   274.0 [sec] since BAT Trigger Time
TAM[0-3]:        100.00 100.00 100.00 100.00
AMPLIFIER:       1
WAVEFORM:        31
SUN_POSTN:       332.93d {+22h 11m 43s}  -11.16d {-11d 09' 34"}
SUN_DIST:        111.80 [deg]   Sun_angle= 9.5 [hr] (West of Sun)
MOON_POSTN:      156.57d {+10h 26m 18s}  +13.14d {+13d 08' 14"}
MOON_DIST:        65.73 [deg]
MOON_ILLUM:      100 [%]
GAL_COORDS:      123.92, 40.49 [deg] galactic lon,lat of the burst
ECL_COORDS:      123.00, 65.22 [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%.