[vsnet-grb 257524] GCN/SWIFT_XRT_IMAGE

[Bacodine]

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Fri 03 Apr 15 21:56:12 UT
NOTICE_TYPE:     Swift-XRT Image
TRIGGER_NUM:     637044,   Seg_Num: 0
GRB_RA:          311.5019d {+20h 46m 00.4s} (J2000),
                 311.8202d {+20h 47m 16.8s} (current),
                 310.4524d {+20h 41m 48.5s} (1950)
GRB_DEC:         -62.7118d {-62d 42' 42.4"} (J2000),
                 -62.6553d {-62d 39' 19.2"} (current),
                 -62.8944d {-62d 53' 39.7"} (1950)
GRB_ERROR:       4.7 [arcsec, radius, statistical plus systematic]
GRB_INTEN:       173 [cnts]
IMG_START_DATE:  17115 TJD;    93 DOY;   15/04/03
IMG_START_TIME:  78931.50 SOD {21:55:31.50} UT,   74.7 [sec] since BAT Trigger Time
CENTROID_X:      286.94,  raw= 287  [pixels]
CENTROID_Y:      289.03,  raw= 289  [pixels]
ROLL:            61.75 [deg]
GAIN:            2
MODE:            3, Long Image mode
WAVEFORM:        134
EXPO_TIME:       2.50 [sec]
GRB_POS_XRT_Y:   -20.67
GRB_POS_XRT_Z:   -43.25
IMAGE_URL:       sw00637044000msxps_rw.img
SUN_POSTN:        12.72d {+00h 50m 54s}   +5.45d {+05d 27' 14"}
SUN_DIST:         82.07 [deg]   Sun_angle= 4.1 [hr] (West of Sun)
MOON_POSTN:      186.62d {+12h 26m 30s}   -3.19d {-03d 11' 20"}
MOON_DIST:       102.41 [deg]
MOON_ILLUM:      100 [%]
GAL_COORDS:      333.15,-36.93 [deg] galactic lon,lat of the burst
ECL_COORDS:      294.44,-42.75 [deg] ecliptic lon,lat of the burst
COMMENTS:        SWIFT-XRT Image.  
COMMENTS:        The object found at this position is either a very bright burst or a cosmic ray hit.  
COMMENTS:        Examine the XRT Image to differentiate (CRs are much more compact); see examples at:  
COMMENTS:        http://www.swift.psu.edu/xrt/XRT_Postage_Stamp_Image_Photo_Gallery.htm .