Localizations of Gamma-Ray Bursts by the All-Sky Monitor on RXTE

Details Localizations of Gamma-Ray Bursts by the All-Sky Monitor on RXTE Localizations of Gamma-Ray Bursts by the All-Sky Monitor on RXTE

Dec 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998aas...193.4209s&link_type=abstract

American Astronomical Society, 193rd AAS Meeting, #42.09; Bulletin of the American Astronomical Society, Vol. 30, p.1312

Astronomy and Astrophysics

Astronomy

1

Scientific paper

We report error boxes for thirteen gamma-ray bursts discovered so far in observations by the ASM with recently improved estimates of the position uncertainties. We have closely examined the efficacy of our analysis software by using it to locate X-ray sources whose positions are well-known. This has enabled us to characterize the shape of the error distribution and derive accurate confidence regions for the GRB detections. Five of the thirteen bursts were identified and localized in real-time, allowing searches for counterparts at optical and radio wavelengths. An arcminute position for GRB 980703 was distributed within 12 h of the burst trigger, leading to the detection of a host galaxy at a redshift of 0.9960+/-0.0002 (Djorgovski et al., GCN 139, 1998). We report on recent and planned improvements to our real-time GRB detection and position distribution program.

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