Broad-band spectral analysis of LMXB XTE J1710−281 with Suzaku. Issue 1 (1st June 2020)

• Record Type: Journal Article
• Authors: Sharma, Prince; Sharma, Rahul; Jain, Chetana; Dutta, Anjan
• Is Part Of: Monthly notices of the Royal Astronomical Society. Volume 496:Issue 1(2020)
• Page Start: 197
• Page End: 205
• Publication Date: 2020-06-01
• Subjects: accretion, accretion discs -- binaries: eclipsing -- stars: neutron -- X-rays: binaries -- X-rays: individual: XTE J1710−281; Astronomy -- Periodicals; Periodicals; 520.5
• DOI: 10.1093/mnras/staa1516
• Languages: English
• ISSNs: 0035-8711

Abstract

ABSTRACT: This work presents the broad-band time-averaged spectral analysis of neutron star (NS) low-mass X-ray binary, XTE J1710−281 by using the Suzaku archival data. The source was in a hard or an intermediate spectral state during this observation. This is the first time that a detailed spectral analysis of the persistent emission spectra of XTE J1710−281 has been done up to 30 keV with improved constraints on its spectral parameters. By simultaneously fitting the X-ray Imaging Spectrometer (0.6–9.0 keV) and the HXD-PIN (15.0–30.0 keV) data, we have modelled the persistent spectrum of the source with models comprising a soft component from accretion disc and/or NS surface/boundary layer and a hard Comptonizing component. The 0.6–30 keV continuum with neutral absorber can be described by a multicolour disc blackbody with an inner disc temperature of kT disc = 0.28 keV, which is significantly Comptonized by the hot electron cloud with electron temperature of kT e ≈ 5 keV and described by photon index Γ = 1.86. A more complex three-component model comprising a multicolour disc blackbody ≈0.30 keV, single-temperature blackbody ≈0.65 keV, and Comptonization from the disc, partially absorbed (about 38 per cent) by an ionized absorber (log(ξ) ≈ 4) describes the broad-band spectrum equally well.