Discovery of the shortest recurrence time between thermonuclear X- ray bursts

Astronomy and Astrophysics – Astronomy

Scientific paper

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X-Ray, Gamma Ray, Binaries, Cataclysmic Variables, Neutron Stars, Transients

Scientific paper

An RXTE observation of 4U 1636-536 taken on March 10th, 2009, revealed two type I X-ray bursts from this well studied neutron star low-mass X- ray binary (NS-LMXB). The recurrence time (wait time) between the two events, 5.4 minutes, is the shortest observed in any NS-LMXB. The average spectrum exhibited by both bursts was thermal. We performed time- resolved spectroscopy along the bursts, using a black body model and an absorbing column density of 0.3e22 cm-2 (Fiocchi et al.

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