Bayesian flare event detection. ROSAT X-ray observations of the UV Cetus type star G 131-026

Details Bayesian flare event detection. ROSAT X-ray observations of the UV Cetus type star G 131-026 Bayesian flare event detection. ROSAT X-ray observations of the UV Cetus type star G 131-026

May 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999a%26a...345..121h&link_type=abstract

Astronomy and Astrophysics, v.345, p.121-126 (1999)

Astronomy and Astrophysics

Astrophysics

6

Methods: Statistical, Stars: Flare, Stars: Individual: G 131-026, Stars: Variables: General, X-Rays: Stars

Scientific paper

We have analyzed ROSAT PSPC observations for flare detection using a formalism of Bayesian model comparison. The method is applicable to the direct unbinned data and divides the whole observation into the most probable partitioning of non-uniform segments during which the photon arrival rate had no statistically significant variation. If more than one such segment is found with significantly different count rates, then variability is detected. As an example for this method, we show how a flare on the X-ray source RX J0008.8+2050, the counterpart of the UV Cet type star G 131-026, located in the solar vicinity, is detected and various items relevant to flare parameter estimation are discussed.

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