[vsnet-grb 362903] GCN/SWIFT_XRT_IMAGE

[Bacodine]

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Wed 11 Apr 18 12:29:27 UT
NOTICE_TYPE:     Swift-XRT Image
TRIGGER_NUM:     824451,   Seg_Num: 0
GRB_RA:          356.8546d {+23h 47m 25.1s} (J2000),
                 357.0762d {+23h 48m 18.2s} (current),
                 356.2528d {+23h 45m 00.6s} (1950)
GRB_DEC:         +66.7784d {+66d 46' 42.2"} (J2000),
                 +66.8800d {+66d 52' 48.0"} (current),
                 +66.5005d {+66d 30' 01.7"} (1950)
GRB_ERROR:       4.7 [arcsec, radius, statistical plus systematic]
GRB_INTEN:       293 [cnts]
IMG_START_DATE:  18219 TJD;   101 DOY;   18/04/11
IMG_START_TIME:  44930.40 SOD {12:28:50.40} UT,   66.7 [sec] since BAT Trigger Time
CENTROID_X:      306.55,  raw= 307  [pixels]
CENTROID_Y:      301.10,  raw= 301  [pixels]
ROLL:            153.50 [deg]
GAIN:            4
MODE:            3, Long Image mode
WAVEFORM:        134
EXPO_TIME:       2.50 [sec]
GRB_POS_XRT_Y:   6.37
GRB_POS_XRT_Z:   0.36
IMAGE_URL:       sw00824451000msxps_rw.img
SUN_POSTN:        19.94d {+01h 19m 46s}   +8.41d {+08d 24' 35"}
SUN_DIST:         60.50 [deg]   Sun_angle= 1.5 [hr] (West of Sun)
MOON_POSTN:      329.40d {+21h 57m 36s}  -13.72d {-13d 42' 55"}
MOON_DIST:        83.12 [deg]
MOON_ILLUM:      21 [%]
GAL_COORDS:      116.67,  4.69 [deg] galactic lon,lat of the burst
ECL_COORDS:       41.29, 58.40 [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 .  
COMMENTS:        There is a bright star (mag=5.95) 4.20 arcmin from the BAT position.