The 1 - 50 keV spectral and timing analysis of IGR J18027-2016: an eclipsing, high mass X-ray binary

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dc.creatorHill, A. B.
dc.creatorWalter, R.
dc.creatorKnigge, C.
dc.creatorBazzano, A.
dc.creatorBelanger, G.
dc.creatorBird, A. J.
dc.creatorDean, A. J.
dc.creatorGalache, J. L.
dc.creatorMalizia, A.
dc.creatorRenaud, M.
dc.creatorStephen, J.
dc.creatorUbertini, P.
dc.date2005-05-04
dc.date.accessioned2026-07-07T06:34:04Z
dc.date.available2026-07-07T06:34:04Z
dc.descriptionWe report the association of the INTEGRAL source IGR J18027-2016 with the BeppoSAX source SAX J1802.7-2017. IGR J18027-2016 is seen to be a weak, persistent source by the IBIS/ISGRI instrument on board INTEGRAL with an average source count rate of 0.55 counts s^-1 (~6.1 mCrab) in the 20-40 keV band. Timing analysis performed on the ISGRI data identifies an orbital period of 4.5696 +/- 0.0009 days and gives an ephemeris of mid-eclipse as, T{mid} = 52931.37 +/- 0.04 MJD. Re-analysis of archival BeppoSAX data has provided a mass function for the donor star, f(m) = 16 +/- 1 M{sun} and a projected semimajor axis of a{x}sin{i} = 68 +/- 1 lt-s. We conclude that the donor is an OB-supergiant with a mass of 18.8-29.3 M{sun} and a radius of 15.0-23.4 R{sun}. Spectra obtained by XMM-Newton and ISGRI indicate a high hydrogen column density of NH = 6.8 x 10^22 cm^-2, which suggests intrinsic absorption. The source appears to be a high mass X-ray binary with the neutron star emitting X-rays through wind-fed accretion while in an eclipsing orbit around an OB-supergiant.
dc.descriptionAccepted for Publication in A&A. 9 pages, 10 figures. Figure 10 has been compressed, lowering the image quality
dc.identifierhttps://arxiv.org/abs/astro-ph/0505078
dc.identifierhttp://arxiv.org/abs/astro-ph/0505078
dc.identifierAstron.Astrophys. 439 (2005) 255-263
dc.identifierdoi:10.1051/0004-6361:20052937
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/99406
dc.subjectAstrophysics
dc.titleThe 1 - 50 keV spectral and timing analysis of IGR J18027-2016: an eclipsing, high mass X-ray binary
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