Title:	Detection of a cyclotron line in SXP 15.3 during its 2017 outburst
Other Titles:	G Vasilopoulos
Authors:	Maitra, Chandreyee Paul, Biswajit Haberl, F Vasilopoulos, G
Keywords:	stars: neutron pulsars: individual: SMC galaxies: individual: SXP 15.3 X-rays: binaries
Issue Date:	11-Oct-2018
Publisher:	Oxford University Press on behalf of the Royal Astronomical Society
Citation:	Monthly Notices of the Royal Astronomical Society, 2018, Vol. 480, pL136-L140
Abstract:	We report the results of AstroSat and NuSTAR observations of the Be/X-ray binary pulsar SXP 15.3 in the Small Magellanic Cloud during its outburst in late 2017, when the source reached a luminosity level of ˜1038 erg s-1, close to the Eddington limit. The unprecedented broad-band coverage of the source allowed us to perform timing and spectral analysis between 3 and 80 keV. The pulse profile exhibits a significant energy dependence, and morphs from a double-peaked profile to a single broad pulse at energies >15 keV. This can be explained by a spectral hardening during an intensity dip seen between the two peaks of the pulse profile. We detect a Cyclotron Resonance Scattering Feature at ˜5 keV in the X-ray spectrum, independent of the choice of the continuum model. This indicates a magnetic field strength of 6 × 1011 G for the neutron star.
Description:	Open Access
URI:	http://hdl.handle.net/2289/7141
ISSN:	0035-8711 1365-2966 - (online)
Alternative Location:	http://adsabs.harvard.edu/abs/2018MNRAS.480L.136M https://arxiv.org/abs/1807.10696 https://doi.org/10.1093/mnrasl/sly141
Copyright:	2018 The Author(s)
Appears in Collections:	Research Papers (A&A)

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