Evolution of MAXI J1631–479 during the January 2019 outburst observed by INTEGRAL/IBIS

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dc.contributor.authorFiocchi, M.
dc.contributor.authorOnori, F.
dc.contributor.authorBazzano, A.
dc.contributor.authorBird, A.J
dc.contributor.author. Bodaghee, A.
dc.contributor.authorCharles, P.A
dc.contributor.authorLepingwell, V.A
dc.contributor.authorMalizia, A.
dc.contributor.authorMasetti, N.
dc.contributor.authorNatalucci
dc.contributor.authorNatalucci, L.
dc.contributor.authorUbertini, P.
dc.date.accessioned2021-07-23T17:03:59Z
dc.date.available2021-07-23T17:03:59Z
dc.date.issued2020-01
dc.descriptionIndexación: Scopuses
dc.description.abstractWe report on a recent bright outburst from the new X-ray binary transient MAXI J1631– 479, observed in January 2019. In particular, we present the 30–200 keV analysis of spectral transitions observed with INTEGRAL/IBIS during its Galactic plane monitoring program. In the MAXI and BAT monitoring period, we observed two different spectral transitions between the high/soft and low/hard states. The INTEGRAL spectrum from data taken soon before the second transition is best described by a Comptonized thermal component with a temperature of kTe ∼ 30 keV and a high-luminosity value of L2−200 keV ∼ 3 × 1038 erg−1 (assuming a distance of 8 kpc). During the second transition, the source shows a hard, power-law spectrum. The lack of high energy cut-off indicates that the hard X-ray spectrum from MAXI J1631–479 is due to a non-thermal emission. Inverse Compton scattering of soft X-ray photons from a non-thermal or hybrid thermal/non-thermal electron distribution can explain the observed X-ray spectrum although a contribution to the hard X-ray emission from a jet cannot be determined at this stage. The outburst evolution in the hardness-intensity diagram, the spectral characteristics, and the rise and decay times of the outburst are suggesting that this system is a black hole candidatees
dc.identifier.citationMonthly Notices of the Royal Astronomical Society Open AccessIssue 3, Pages 3657 - 36611 March 2020es
dc.identifier.issn00358711
dc.identifier.urihttp://repositorio.unab.cl/xmlui/handle/ria/19484
dc.language.isoenes
dc.publisherOxford University Presses
dc.subjectradiation mechanisms: non-thermal – stars: black holes – stars: individual: MAXI J1631–479 – stars: neutron – X-rays: binaries.es
dc.titleEvolution of MAXI J1631–479 during the January 2019 outburst observed by INTEGRAL/IBISes
dc.typeArtículoes
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