Swift deep galactic plane survey classification of swift J170800-402551.8 as a candidate intermediate polar cataclysmic variable

O'Connor, B. and Göğüş, Ersin and Hare, J. and Mukai, K. and Huppenkothen, D. and Brink, J. and Buckley, D. A. H. and Levan, A. and Baring, M. G. and Stewart, R. and Kouveliotou, C. and Woudt, P. and Bellm, E. and Cenko, S. B. and Evans, P. A. and Granot, J. and Hailey, C. and Harrison, F. and Hartmann, D. and Van Der Horst, A. J. and Kaper, L. and Kennea, J. A. and Potter, S. B. and Slane, P. O. and Stern, D. and Wijers, R. A. M. J. and Younes, G. (2023) Swift deep galactic plane survey classification of swift J170800-402551.8 as a candidate intermediate polar cataclysmic variable. Monthly Notices of the Royal Astronomical Society, 525 (4). pp. 5015-5024. ISSN 0035-8711 (Print) 1365-2966 (Online)

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Here, we present the results of our multiwavelength campaign aimed at classifying Swift J170800-402551.8 as part of the Swift Deep Galactic Plane Survey (DGPS). We utilized Target of Opportunity (ToO) observations with the Neil Gehrels Swift Observatory, Chandra X-ray Observatory, Neutron star Interior Composition Explorer (NICER), X-ray Multi-Mirror Mission (XMM-Newton), Nuclear Spectroscopic Telescope Array (NuSTAR), and the Southern African Large Telescope (SALT), as well as multiwavelength archival observations from Gaia, VST Photometric Hα Survey, and VISTA Variables in the Via Lactea. The source displays a periodicity of 784 s in our XMM-Newton observation. The X-ray spectrum (XMM-Newton and NuSTAR) can be described by thermal bremsstrahlung radiation with a temperature of kT ≈ 30 keV. The phase-folded X-ray light curve displays a double-peaked, energy-dependent pulse profile. We used Chandra to precisely localize the source, allowing us to identify and study the multiwavelength counterpart. Spectroscopy with SALT identified a Balmer H α line, and potential He i lines, from the optical counterpart. The faintness of the counterpart (r ≈ 21 AB mag) favours a low-mass donor star. Based on these criteria, we classify Swift J170800-402551.8 as a candidate intermediate polar cataclysmic variable, where the spin period of the white dwarf is 784 s.
Item Type: Article
Uncontrolled Keywords: binaries: general; novae, cataclysmic variables; X-rays: general
Divisions: Faculty of Engineering and Natural Sciences
Depositing User: Ersin Göğüş
Date Deposited: 08 Jun 2024 21:58
Last Modified: 08 Jun 2024 21:58
URI: https://research.sabanciuniv.edu/id/eprint/49158

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