[vsnet-grb 279601] GCN/SWIFT_XRT_IMAGE

[Bacodine]

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Mon 28 Dec 15 22:48:44 UT
NOTICE_TYPE:     Swift-XRT Image
TRIGGER_NUM:     668641,   Seg_Num: 0
GRB_RA:          344.4248d {+22h 57m 41.9s} (J2000),
                 344.6263d {+22h 58m 30.3s} (current),
                 343.7949d {+22h 55m 10.7s} (1950)
GRB_DEC:          +8.0807d {+08d 04' 50.5"} (J2000),
                  +8.1665d {+08d 09' 59.3"} (current),
                  +7.8129d {+07d 48' 46.5"} (1950)
GRB_ERROR:       4.7 [arcsec, radius, statistical plus systematic]
GRB_INTEN:       173 [cnts]
IMG_START_DATE:  17384 TJD;   362 DOY;   15/12/28
IMG_START_TIME:  82084.46 SOD {22:48:04.46} UT,   49.5 [sec] since BAT Trigger Time
CENTROID_X:      280.32,  raw= 280  [pixels]
CENTROID_Y:      278.35,  raw= 278  [pixels]
ROLL:            242.43 [deg]
GAIN:            4
MODE:            3, Long Image mode
WAVEFORM:        134
EXPO_TIME:       2.50 [sec]
GRB_POS_XRT_Y:   -45.83
GRB_POS_XRT_Z:   -58.87
IMAGE_URL:       sw00668641000msxps_rw.img
SUN_POSTN:       277.49d {+18h 29m 57s}  -23.26d {-23d 15' 28"}
SUN_DIST:         72.71 [deg]   Sun_angle= -4.5 [hr] (East of Sun)
MOON_POSTN:      141.01d {+09h 24m 02s}  +12.24d {+12d 14' 16"}
MOON_DIST:       148.90 [deg]
MOON_ILLUM:      87 [%]
GAL_COORDS:       80.85,-45.30 [deg] galactic lon,lat of the burst
ECL_COORDS:      348.85, 13.57 [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 .