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

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

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 ∼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 ∼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.

Accretion, Accretion discs, Stars: Neutron, X-rays: Binaries, X-rays: Bursts, X-rays: Individual: 4U 1636–536
0035-8711
4397-4407
Beri, Aru
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Paul, Biswajit
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Yadav, J. S.
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Antia, H. M.
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Agrawal, P. C.
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Manchanda, R. K.
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Dedhia, Dhiraj
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Chauhan, Jai Verdhan
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Pahari, Mayukh
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Misra, Ranjeev
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Katoch, Tilak
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Madhwani, P.
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Shah, Parag
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Varun,
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Mate, Sujay
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Beri, Aru
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Paul, Biswajit
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Yadav, J. S.
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Antia, H. M.
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Agrawal, P. C.
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Manchanda, R. K.
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Dedhia, Dhiraj
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Chauhan, Jai Verdhan
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Pahari, Mayukh
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Misra, Ranjeev
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Katoch, Tilak
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Madhwani, P.
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Shah, Parag
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Varun,
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Mate, Sujay
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Beri, Aru, Paul, Biswajit, Yadav, J. S., Antia, H. M., Agrawal, P. C., Manchanda, R. K., Dedhia, Dhiraj, Chauhan, Jai Verdhan, Pahari, Mayukh, Misra, Ranjeev, Katoch, Tilak, Madhwani, P., Shah, Parag, Varun, and Mate, Sujay (2019) Thermonuclear X-ray bursts in rapid succession in 4U 1636–536 with AstroSat-LAXPC. Monthly Notices of the Royal Astronomical Society, 482 (4), 4397-4407. (doi:10.1093/mnras/sty2975).

Record type: Article

Abstract

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 ∼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 ∼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.

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Accepted/In Press date: 30 October 2018
e-pub ahead of print date: 3 November 2018
Published date: 1 February 2019
Keywords: Accretion, Accretion discs, Stars: Neutron, X-rays: Binaries, X-rays: Bursts, X-rays: Individual: 4U 1636–536

Identifiers

Local EPrints ID: 428958
URI: https://eprints.soton.ac.uk/id/eprint/428958
ISSN: 0035-8711
PURE UUID: 9487bf72-1c70-4980-acdb-3cbef40fec7b

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Date deposited: 15 Mar 2019 17:30
Last modified: 15 Mar 2019 17:30

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Contributors

Author: Aru Beri
Author: Biswajit Paul
Author: J. S. Yadav
Author: H. M. Antia
Author: P. C. Agrawal
Author: R. K. Manchanda
Author: Dhiraj Dedhia
Author: Jai Verdhan Chauhan
Author: Mayukh Pahari
Author: Ranjeev Misra
Author: Tilak Katoch
Author: P. Madhwani
Author: Parag Shah
Author: Varun
Author: Sujay Mate

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