VizieR Online Data Catalog: Position catalogue of Swift XRT afterglows (Moretti+, 2006)
Abstract
We present a catalogue of refined positions of 68 gamma ray burst (GRB) afterglows observed by the Swift X-ray Telescope (XRT) from the launch up to 2005 Oct. 16. This is a result of the refinement of the XRT boresight calibration. We tested this correction by means of a systematic study of a large sample of X-ray sources observed by XRT with well established optical counterparts. We found that we can reduce the systematic error radius of the measurements by a factor of two, from 6.5 to 3.2 (90% of confidence). We corrected all the positions of the afterglows observed by XRT in the first 11 months of the Swift mission. This is particularly important for the 37 X-ray afterglows without optical counterpart. Optical follow-up of dark GRBs, in fact, will be more efficient with the use of the more accurate XRT positions.
(1 data file).- Publication:
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VizieR Online Data Catalog
- Pub Date:
- February 2006
- DOI:
- 10.26093/cds/vizier.34489009
- Bibcode:
- 2006yCat..34489009M
- Keywords:
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- Gamma rays;
- Positional data