Skip to main content
Testing. You are viewing the public testing version of GCN. For the production version, go to
New Announcement Feature, Code of Conduct, Circular Revisions. See news and announcements

GCN Circular 2951

GRB050117: Swift XRT Position
2005-01-17T13:42:00Z (19 years ago)
David Burrows at PSU/Swift <>
D. N. Burrows, J. E. Hill,  G. Chincarini, J. Nousek, N. Gehrels, and P. Schady
report on behalf of the Swift XRT team:

The Swift XRT reported a prompt position for GRB050117.  The burst was
discovered by the BAT and the Swift spacecraft performed a prompt slew.   The
XRT found a bright source in the field and imaged it at
IMG_START_DATE:  13387 TJD;    17 DOY;   05/01/17
IMG_START_TIME:  46548.64 SOD {12:55:48.64} UT

The XRT position is
GRB_RA:          358.4644d {+23h 53m 51s} (J2000),
                 358.5274d {+23h 54m 07s} (current),
                 357.8439d {+23h 51m 23s} (1950)
GRB_DEC:         +65.9418d {+65d 56' 30"} (J2000),
                 +65.9699d {+65d 58' 12"} (current),
                 +65.6635d {+65d 39' 49"} (1950)

The XRT positions are not yet fully calibrated, and we estimate an uncertainty
of 30 arcseconds in these coordinates.  The XRT prompt image confirms that a
point source is located at this position.  A check of SIMBAD shows no bright
X-ray sources in this location.  Further information, including an XRT
lightcurve and spectrum, will be available in a few hours.
Looking for U.S. government information and services? Visit