On the nature of the hard X-ray sources SWIFT J1907.3-2050, IGR J12123-5802 and IGR J19552+0044

dc.creatorBernardini, Federico
dc.creatorMartino, D. de
dc.creatorMukai, K.
dc.creatorFalanga, Maurizio
dc.creatorAndruchow, Ileana
dc.creatorBonnet Bidaud, J. M.
dc.creatorMasetti, N.
dc.creatorGonzalez Buitrago, D. H.
dc.creatorMouchet, M.
dc.creatorTovmassian, Gagik
dc.date2013
dc.date2019-11-12T14:03:54Z
dc.identifierhttp://sedici.unlp.edu.ar/handle/10915/85382
dc.identifierissn:0035-8711
dc.descriptionThe <i>INTEGRAL</i> and <i>Swift</i> hard X-ray surveys have identified a large number of new sources, among which many are proposed as Cataclysmic Variables (CVs). Here, we present the first detailed study of three X-ray-selected CVs, Swift J1907.3-2050, IGR J12123-5802 and IGR J19552+0044 based on <i>XMM-Newton</i>, <i>Suzaku</i>, <i>Swift</i> observations and groundbased optical and archival (near-IR) nIR/IR data. Swift J1907.3-2050 is highly variable from hours to months-years at all wavelengths. No coherent X-ray pulses are detected but rather transient features. The X-ray spectrum reveals a multitemperature optically thin plasma absorbed by complex neutral material and a soft blackbody component arising from a small area. These characteristics are remarkably similar to those observed inmagnetic CVs. A suprasolar abundance of nitrogen could arise from nuclear processed material from the donor star. Swift J1907.3-2050 could be a peculiar magnetic CV with the second longest (20.82 h) binary period. IGR J12123-5802 is variable in the X-rays on a time-scale of ≳ 7.6 h. No coherent pulsations are detected, but its spectral characteristics suggest that it could be a magnetic CV of the Intermediate Polar (IP) type. IGR J19552+0044 shows two X-ray periods, ~1.38 h and ~1.69 h and an X-ray spectrum characterized by a multitemperature plasma with little absorption. We derive a low accretion rate, consistent with a CV below the orbital period gap. Its peculiar nIR/IR spectrum suggests a contribution from cyclotron emission. It could either be a pre-polar or an IP with the lowest degree of asynchronism.
dc.descriptionFacultad de Ciencias Astronómicas y Geofísicas
dc.descriptionInstituto de Astrofísica de La Plata
dc.formatapplication/pdf
dc.format2822-2834
dc.languageen
dc.rightshttp://creativecommons.org/licenses/by-nc-sa/4.0/
dc.rightsCreative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)
dc.subjectCiencias Astronómicas
dc.subjectX-rays: individual: IGR J19552+0044
dc.subjectX-rays: individual: Swift J1212.3-5806 (also known as: IGR J12123-5802 and 1RXS J121222.7-580118)
dc.subjectX-rays: individual: Swift J1907.3-2050 (also known as: V1082 Sgr)
dc.subjectX-rays: individual: WISE J195512.47+004536.6
dc.titleOn the nature of the hard X-ray sources SWIFT J1907.3-2050, IGR J12123-5802 and IGR J19552+0044
dc.typeArticulo
dc.typeArticulo


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