INTEGRAL detection of a long powerful burst from SLX 1735-269
Abstract
We present results of an analysis of the bursting behavior of the low mass X-ray binary system SLX 1735-269 during INTEGRAL observations of the Galactic Center region in 2003. Six type-I X-ray bursts were detected in total with one being much longer and more powerful then the others. A strong dependence of the burst recurrence time on the mass accretion rate is observed, that is likely caused by a change in the burning regime. The long burst demonstrated a photospheric radius expansion. We discuss possible scenarios of this long burst and show that it is unlikely a carbon burning flash but rather burning of a large pile of hydrogen and helium accelerated by electron capture processes in a dense accumulated layer.
- Publication:
-
Astronomy and Astrophysics
- Pub Date:
- May 2005
- DOI:
- 10.1051/0004-6361:20041846
- arXiv:
- arXiv:astro-ph/0408258
- Bibcode:
- 2005A&A...434.1069M
- Keywords:
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- X-rays: binaries;
- X-rays: individuals: SLX 1735-269;
- Astrophysics
- E-Print:
- 8 pages, 6 figures, submitted for the publication in Astronomy &