[vsnet-grb 258204] GCN/SWIFT_XRT_POSITION

[Bacodine]

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sat 11 Apr 15 19:39:32 UT
NOTICE_TYPE:     Swift-XRT Position
TRIGGER_NUM:     637765,   Seg_Num: 0
GRB_RA:          272.1135d {+18h 08m 27.23s} (J2000),
                 272.3732d {+18h 09m 29.56s} (current),
                 271.2634d {+18h 05m 03.22s} (1950)
GRB_DEC:         -36.9774d {-36d 58' 38.6"} (J2000),
                 -36.9741d {-36d 58' 26.6"} (current),
                 -36.9856d {-36d 59' 08.1"} (1950)
GRB_ERROR:       4.8 [arcsec radius, statistical plus systematic, 90% containment]
GRB_INTEN:       6.62e-09 [erg/cm2/sec]
GRB_SIGNIF:      12.84 [sigma]
IMG_START_DATE:  17123 TJD;   101 DOY;   15/04/11
IMG_START_TIME:  70631.26 SOD {19:37:11.26} UT,   46.0 [sec] since BAT Trigger Time
TAM[0-3]:        327.64 237.21 261.39 243.79
AMPLIFIER:       2
WAVEFORM:        134
SUN_POSTN:        19.96d {+01h 19m 52s}   +8.42d {+08d 25' 09"}
SUN_DIST:        109.08 [deg]   Sun_angle= 7.2 [hr] (West of Sun)
MOON_POSTN:      287.95d {+19h 11m 49s}  -17.12d {-17d 07' 24"}
MOON_DIST:        24.14 [deg]
MOON_ILLUM:      54 [%]
GAL_COORDS:      355.39, -8.15 [deg] galactic lon,lat of the burst
ECL_COORDS:      271.74,-13.55 [deg] ecliptic lon,lat of the burst
COMMENTS:        SWIFT-XRT Coordinates.  
COMMENTS:        This matches a source in the BAT ground catalog: SAX1808.4-3658,   delta=0.003 [deg].  
COMMENTS:        The XRT position is 1.93 arcmin from the BAT position.  
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 .