[vsnet-grb 174053] GCN/SWIFT_XRT_IMAGE

[Bacodine]

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sat 28 Apr 12 15:57:58 UT
NOTICE_TYPE:     Swift-XRT Image
TRIGGER_NUM:     521085,   Seg_Num: 0
GRB_RA:          248.5063d {+16h 34m 01.5s} (J2000),
                 248.7337d {+16h 34m 56.0s} (current),
                 247.5855d {+16h 30m 20.5s} (1950)
GRB_DEC:         -47.3934d {-47d 23' 36.2"} (J2000),
                 -47.4184d {-47d 25' 06.2"} (current),
                 -47.2893d {-47d 17' 21.5"} (1950)
GRB_ERROR:       4.7 [arcsec, radius, statistical plus systematic]
GRB_INTEN:       231 [cnts]
IMG_START_DATE:  16045 TJD;   119 DOY;   12/04/28
IMG_START_TIME:  57427.49 SOD {15:57:07.49} UT,   395.7 [sec] since BAT Trigger Time
CENTROID_X:      339.25,  raw= 339  [pixels]
CENTROID_Y:      310.43,  raw= 310  [pixels]
ROLL:            130.17 [deg]
GAIN:            4
MODE:            3, Long Image mode
WAVEFORM:        134
EXPO_TIME:       2.50 [sec]
GRB_POS_XRT_Y:   29.30
GRB_POS_XRT_Z:   83.80
IMAGE_URL:       sw00521085000msxps_rw.img
SUN_POSTN:        36.37d {+02h 25m 30s}  +14.42d {+14d 25' 06"}
SUN_DIST:        137.47 [deg]   Sun_angle= 9.8 [hr] (West of Sun)
MOON_POSTN:      120.96d {+08h 03m 50s}  +15.95d {+15d 56' 52"}
MOON_DIST:       126.93 [deg]
MOON_ILLUM:      42 [%]
GAL_COORDS:      336.91,  0.25 [deg] galactic lon,lat of the burst
ECL_COORDS:      254.10,-25.13 [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 .