• Thermonuclear X-ray burst of MXB 1658-298 with $NuSTAR$

• # Fulltext

https://www.ias.ac.in/article/fulltext/joaa/039/01/0016

• # Keywords

Stars: neutron—X-ray: binaries—X-rays: bursts—X-rays: individual (MXB 1658-298). 1. Introduction MXB 1658-298 is a transient Low-Mass X-ray Binary (LMXB) system which was discovered in 1976 by observations made with SAS-3 (Lewin et al. 1976). It has an orbital period of ∼7.1 h and the light curve shows an eclipse lasting for ∼15 min (Cominsky & Wood 1984). About two years after its discov

• # Abstract

MXB 1658-298 is a transient Low-Mass X-ray Binary (LMXB), which shows eclipses, dips and bursts in its light curve. This source has undergone three active periods separated by long quiescent phases. The latest phase of enhanced X-ray emission was observed during 2015–2016. We have analysed broadband data from Swift/XRT and NuSTAR observations carried out in 2015. During NuSTAR observation, one thermonuclear X-ray burst took place. The X-ray emission during the burst was brighter by a factor of $\sim$200, compared to the pre-burst emission. This work focuses on the spectral analysis of MXB 1658-298 during the persistentand the burst phases using NuSTAR observation of 2015. We have also determined the temperature and radiusevolution during the burst using the time-resolved spectroscopy. The burst phase shows mild Photospheric Radius Expansion (PRE).

• # Author Affiliations

1. Department of Physics and Astrophysics, University of Delhi, Delhi 110 007, India.
2. Hansraj College, University of Delhi, Delhi 110 007, India.
3. Raman Research Institute, Sadashivanagar, C. V. Raman Avenue, Bangalore 560 080, India.

• # Journal of Astrophysics and Astronomy

Volume 43, 2022
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