Title:	Post-flare formation of the accretion stream and a dip in pulse profiles of LMC X-4
Authors:	Beri, Aru Paul, Biswajit
Keywords:	X-ray neutron stars pulsars KMC X-4
Issue Date:	Oct-2017
Publisher:	Elsevier B. V.
Citation:	New Astronomy, 2017, Vol. 56, p94-101
Abstract:	We report here a pulse profile evolution study of an accreting X-ray pulsar LMC X–4 during and after the large X-ray flares using data from the two observatories XMM-Newton and RXTE. During the flares, the pulse profiles were found to have a significant phase offset in the range of 0.2–0.5 compared to the pulse profiles immediately before or after the flare. Investigating the pulse profiles for about 105 s after the flares, it was found that it takes about 2000–4000 s for the modified accretion column to return to its normal structure and formation of an accretion stream that causes a dip in the pulse profile of LMC X–4. We have also carried out pulse phase resolved spectroscopy of LMC X–4 in narrow phase bins using data from EPIC-pn and spectroscopically confirmed the pulsating nature of the soft spectral component, having a pulse fraction and phase different from that of the power-law component.
Description:	Restricted Access. An open-access version is available at arXiv.org (one of the alternative locations)
URI:	http://hdl.handle.net/2289/6756
ISSN:	1384-1076
Alternative Location:	http://adsabs.harvard.edu/abs/2017NewA...56...94B http://arxiv.org/abs/1705.05205 http://dx.doi.org/10.1016/j.newast.2017.05.001
Copyright:	2017 Elesvier B.V.
Appears in Collections:	Research Papers (A&A)

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