Hard X-ray cataclysmic variables

Martino, D. de; Bernardini, F.; Mukai, K.; Falanga, M.; Masetti, N.

doi:10.1016/j.asr.2019.09.006

Cited by 41 publications

(36 citation statements)

References 136 publications

(218 reference statements)

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“…These values are fully compatible with what is generally observed in a LMXB system during outburst (see e.g. Tanaka & Shibazaki 1996), but admittedly too large for a CV (e.g., Brunschweiger et al 2009;Yuasa et al 2010;de Martino et al 2020).…”

Section: The X-ray Binary Nature Of Swift J17134−4219supporting

confidence: 89%

Multiwavelength observations of the Galactic X-ray binaries IGR J20155+3827 and Swift J1713.4−4219

Onori

Fiocchi

Masetti

et al. 2021

Monthly Notices of the Royal Astronomical Society

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In recent years, thanks to the continuous surveys performed by INTEGRAL and Swift satellites, our knowledge of the hard X-ray/soft gamma-ray sky has greatly improved. As a result it is now populated with about 2000 sources, both Galactic and extra-galactic, mainly discovered by IBIS and BAT instruments. Many different follow-up campaigns have been successfully performed by using a multi-wavelength approach, shedding light on the nature of a number of these new hard X-ray sources. However, a fraction are still of a unidentified nature. This is mainly due to the lack of lower energy observations, which usually deliver a better constrained position for the sources, and the unavailability of the key observational properties, needed to obtain a proper physical characterization. Here we report on the classification of two poorly studied Galactic X-ray transients IGR J20155+3827 and Swift J1713.4−4219, for which the combination of new and/or archival X-ray and Optical/NIR observations have allowed us to pinpoint their nature. In particular, thanks to XMM-Newton archival data together with new optical spectroscopic and archival Optical/NIR photometric observations, we have been able to classify IGR J20155+3827 as a distant HMXB. The new INTEGRAL and Swift data collected during the 2019 X-ray outburst of Swift J1713.4−4219, in combination with the archival optical/NIR observations, suggest a LMXB classification for this source.

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Section: The X-ray Binary Nature Of Swift J17134−4219supporting

confidence: 89%

Multiwavelength observations of the Galactic X-ray binaries IGR J20155+3827 and Swift J1713.4−4219

Onori

Fiocchi

Masetti

et al. 2021

Monthly Notices of the Royal Astronomical Society

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“…We expect that up to ∼ 10 3 CVs will be found by ART-XC compared to just several dozen present in existing X-ray-selected samples (e.g. Pretorius et al 2013;de Martino et al 2020;Lutovinov et al 2020). This, together with the availability of accurate distances for many of these objects from the Gaia mission (Gaia Collaboration et al 2018), will enable precise measurement of the X-ray luminosity function of CVs for the first time (Mereminskiy et al 2019).…”

Section: X-ray Binaries and Cataclysmic Variablesmentioning

confidence: 92%

The ART-XC telescope on board the SRG observatory

Pavlinsky

Tkachenko

Levin

et al. 2021

A&A

109

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Astronomical Roentgen Telescope – X-ray Concentrator (ART-XC) is the hard X-ray instrument with grazing incidence imaging optics on board the Spektr-Roentgen-Gamma (SRG) observatory. The SRG observatory is the flagship astrophysical mission of the Russian Federal Space Program, which was successively launched into orbit around the second Lagrangian point (L2) of the Earth-Sun system with a Proton rocket from the Baikonur cosmodrome on 13 July 2019. The ART-XC telescope will provide the first ever true imaging all-sky survey performed with grazing incidence optics in the 4–30 keV energy band and will obtain the deepest and sharpest map of the sky in the energy range of 4–12 keV. Observations performed during the early calibration and performance verification phase as well as during the ongoing all-sky survey that started on 12 December 2019 have demonstrated that the in-flight characteristics of the ART-XC telescope are very close to expectations based on the results of ground calibrations. Upon completion of its four-year all-sky survey, ART-XC is expected to detect approximately 5000 sources (~3000 active galactic nuclei, including heavily obscured ones, several hundred clusters of galaxies, ~1000 cataclysmic variables and other Galactic sources), and to provide a high-quality map of the Galactic background emission in the 4–12 keV energy band. ART-XC is also well suited for discovering transient X-ray sources. In this paper, we describe the telescope, the results of its ground calibrations, the major aspects of the mission, the in-flight performance of ART-XC, and the first scientific results.

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“…Many IPs have been discovered through INTE-GRAL and Swift/BAT hard X-ray (E > 10 keV) surveys (de Martino et al 2019), for which interstellar absorption is not an issue. They have typically L X above 10 33 erg s −1 meaning that, with the available sensitivities, the systems can be discovered out beyond 1 kpc (Pretorius & Mukai 2014).…”

Section: Discussionmentioning

confidence: 99%

“…They have typically L X above 10 33 erg s −1 meaning that, with the available sensitivities, the systems can be discovered out beyond 1 kpc (Pretorius & Mukai 2014). Although large enough to yield a statistically significant sample of luminous IPs, the hard X-ray source catalogs are small enough (< 2000 objects) for systematic identification and follow-up programs (see, e.g., Halpern et al 2018;de Martino et al 2019). However, there appears to be a separate class of low-luminosity IPs (LLIPs; Pretorius & Mukai 2014) typically with L X ∼10 31 erg s −1 , only a subset of which have been detected in hard X-ray all-sky surveys (Mukai 2017).…”

Section: Discussionmentioning

confidence: 99%