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Thermonuclear X-ray bursts in rapid succession in 4U 1636-536 with AstroSat-LAXPC

Beri, Aru and Paul, Biswajit and Yadav, JS and Antia, HM and Agrawal, PC and Manchanda, RK and Dedhia, Dhiraj and Chauhan, Jai Verdhan and Pahari, Mayukh and Misra, Ranjeev and Katoch, Tilak and Madhwani, P and Shah, Parag and Varun, . and Mate, Sujay (2019) Thermonuclear X-ray bursts in rapid succession in 4U 1636-536 with AstroSat-LAXPC. In: MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 482 (4). pp. 4397-4407.

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Official URL: http://dx.doi.org/10.1093/mnras/sty2975


We present results from an observation of the low-mass X-ray binary 4U 1636-536 obtained with the LAXPC instrument aboard AstroSat. The observations of 4U 1636-536 made during the performance verification phase of AstroSat showed seven thermonuclear X-ray bursts in a total exposure of similar to 65 ks over a period of about two consecutive days. Moreover, the light curve of 4U 1636-536 revealed the presence of a rare triplet of X-ray bursts, having a wait time of about 5.5 min between the second and the third bursts. We also present results from time-resolved spectroscopy performed during these seven X-ray bursts. In addition, we have also detected a transient quasi-periodic oscillation at similar to 5 Hz. However, we did not find any evidence of kilo-hertz quasi-periodic oscillations and/or X-ray burst oscillations, perhaps due to the hard spectral state of the source during this observation.

Item Type: Journal Article
Publisher: Oxford University Press
Additional Information: Copyright of this article belongs to Oxford University Press
Keywords: accretion,accretion discs;stars:neutron;X-rays:binaries;X-rays:bursts;X-rays:individual:4U 1636-536
Department/Centre: Division of Physical & Mathematical Sciences > Physics
Date Deposited: 21 Apr 2019 08:06
Last Modified: 21 Apr 2019 08:06
URI: http://eprints.iisc.ac.in/id/eprint/62299

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