Title:	Thermonuclear X-ray bursts in rapid succession in 4U 1636-536 with AstroSat-LAXPC
Authors:	Beri, Aru Paul, Biswajit Varun + 12 Co-authors
Keywords:	accretion accretion discs stars: neutron X-rays: binaries X-rays: bursts X-rays: individual: 4U 1636—53
Issue Date:	1-Feb-2019
Publisher:	Oxford University Press on behalf of the Royal Astronomical Society
Citation:	Monthly Notices of the Royal Astronomical Society, 2019, Vol. 482, p4397–4407
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.
Description:	Open Access
URI:	http://hdl.handle.net/2289/7137
ISSN:	0035-8711 1365-2966 - (online)
Alternative Location:	http://adsabs.harvard.edu/abs/2019MNRAS.482.4397B https://arxiv.org/abs/1811.10030 https://doi.org/10.1093/mnras/sty2975
Copyright:	2019 The Author(s)
Appears in Collections:	Research Papers (A&A)

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