The INTEGRAL view of the pulsating hard X-ray sky: from accreting and transitional millisecond pulsars to rotation-powered pulsars and magnetars

Papitto, A.; Falanga, M.; Hermsen, W.; Mereghetti, S.; Kuiper, L.; Poutanen, Juri; Bozzo, E.; Ambrosino, Filippo; Zelati, F. Coti; Falco, Vittorio De; Martino, D. de; Salvo, T. Di; Esposito, P.; Ferrigno, C.; Forot, M.; Götz, D.; Gouiffès, C.; Iaria, R.; Laurent, Philippe; Li, J.; Li, Z.; Mineo, T.; Moran, Paul; Neronov, A.; Paizis, A.; Rea, N.; Riggio, A.; Sanna, A.; Savchenko, V.; Słowikowska, A.; Shearer, A.; Tiengo, A.; Torres, D. F.

doi:10.1016/j.newar.2020.101544

Cited by 19 publications

(16 citation statements)

References 279 publications

(331 reference statements)

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“…The broad-band spectra in the energy range 1-250 keV for the brighter 2018 outburst and in the range 1.5-80 keV for the fainter 2019 outbursts, were well fitted by a thermal Comptonization model compps with a similar set of parameters: the electron temperature kT e = 40-50 keV, Thomson optical depth τ ∼ 1.3, blackbody seed photon temperature kT bb,seed ∼0.7-0.8 keV. The spectral shape is very similar to those observed in many other AMXPs (Papitto et al 2020).…”

Section: Discussionsupporting

confidence: 71%

“…On the other hand, between the outbursts, long-term monitoring shows some AMXPs to exhibit spin-down in quiescence (see, e.g., Hartman et al 2009;Patruno et al 2010;Papitto et al 2010). For reviews of the properties of these objects, we refer to Wijnands (2006), Poutanen (2006), Patruno & Watts (2021), Campana & Di Salvo (2018), Papitto et al (2020), and Di Salvo & Sanna (2020).…”

Section: Introductionmentioning

confidence: 99%

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Broad-band X-ray spectra and timing of the accretion-powered millisecond pulsar Swift J1756.9$-$2508 during its 2018 and 2019 outbursts

Li,

Kuiper,

Falanga

et al. 2021

Preprint

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The accreting millisecond X-ray pulsar Swift J1756.9−2508 went into outburst in April 2018 and June 2019, 8.7 yr after the previous activity period. We investigated the temporal, timing and spectral properties of these two outbursts using data from NICER, XMM-Newton, NuSTAR, INTEGRAL, Swift and Insight-HXMT. The two outbursts exhibited similar broad-band spectra and X-ray pulse profiles. For the first time, we report the detection of the pulsed emission up to ∼ 100 keV observed by Insight-HXMT during the 2018 outburst. We also found the pulsation up to ∼ 60 keV observed by NICER and NuSTAR during the 2019 outburst. We performed a coherent timing analysis combining the data from two outbursts. The binary system is well described by a constant orbital period over a time span of ∼ 12 years. The time-averaged broad-band spectra are well fitted by an absorbed thermal Comptonization model compps in a slab geometry with the electron temperature kT e = 40-50 keV, Thomson optical depth τ ∼ 1.3, blackbody seed photon temperature kT bb,seed ∼0.7-0.8 keV and hydrogen column density of N H ∼ 4.2 × 10 22 cm −2 . We searched the available data for type-I (thermonuclear) X-ray bursts, but found none, which is unsurprising given the estimated low peak accretion rate (≈ 0.05 of the Eddington rate) and generally low expected burst rates for hydrogen-poor fuel. Based on the history of four outbursts to date, we estimate the long-term average accretion rate at roughly 5 × 10 −12 M yr −1 for an assumed distance of 8 kpc. The expected mass transfer rate driven by gravitational radiation in the binary implies the source can be no closer than 4 kpc. Swift J1756.9−2508 is the third low mass X-ray binary exhibiting "double" outbursts, separated by much shorter intervals than usual, and likely resulting from interruption of the accretion flow from the disk onto the neutron star. Such behavior may have important implications for the disk instability model.

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Section: Discussionsupporting

confidence: 71%

Section: Introductionmentioning

confidence: 99%

Broad-band X-ray spectra and timing of the accretion-powered millisecond pulsar Swift J1756.9$-$2508 during its 2018 and 2019 outbursts

Li,

Kuiper,

Falanga

et al. 2021

Preprint

Self Cite

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“…Despite significant progress in the study of such systems in recent decades (e.g. Revnivtsev et al 2008;Lutovinov et al 2013;Hong et al 2016;Kretschmar et al 2019;Sazonov et al 2020;Papitto et al 2020), their physical and statistical properties are still not known anywhere near as well as those of brighter X-ray binaries with L X ∼ 10 35 -10 38 erg s −1 . ART-XC will make a census of such low-luminosity X-ray binaries for the first time.…”

Section: X-ray Binaries and Cataclysmic Variablesmentioning

confidence: 99%

The ART-XC telescope on board the SRG observatory

Pavlinsky

Tkachenko

Levin

et al. 2021

A&A

114

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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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“…Despite a significant progress in the study of such systems in the last decades (e.g. Revnivtsev et al 2008;Lutovinov et al 2013;Hong et al 2016;Kretschmar et al 2019;Sazonov et al 2020;Papitto et al 2020), their physical and statistical properties are still known much worse than those of brighter X-ray binaries with L X ∼ 10 35 -10 38 erg s −1 . ART-XC will make a census of such low-luminosity X-ray binaries for the first time.…”

Section: X-ray Binaries and Cataclysmic Variablesmentioning

confidence: 99%

The ART-XC telescope on board the SRG observatory

Pavlinsky,

Tkachenko,

Levin

et al. 2021

Preprint

View full text Add to dashboard Cite

ART-XC (Astronomical Roentgen Telescope -X-ray Concentrator) 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 on-going all-sky survey that started on 12 Dec. 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 4-year all-sky survey, ART-XC is expected to detect ∼ 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, results of its ground calibrations, major aspects of the mission, the in-flight performance of ART-XC and first scientific results.

show abstract

The INTEGRAL view of the pulsating hard X-ray sky: from accreting and transitional millisecond pulsars to rotation-powered pulsars and magnetars

Cited by 19 publications

References 279 publications

Broad-band X-ray spectra and timing of the accretion-powered millisecond pulsar Swift J1756.9$-$2508 during its 2018 and 2019 outbursts

Broad-band X-ray spectra and timing of the accretion-powered millisecond pulsar Swift J1756.9$-$2508 during its 2018 and 2019 outbursts

The ART-XC telescope on board the SRG observatory

The ART-XC telescope on board the SRG observatory

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