The identification of the long-period X-ray pulsar 1WGA J1958.2+323 with a Be-star/X-ray binary

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dc.creatorIsrael, G. L.
dc.creatorCovino, S.
dc.creatorPolcaro, V. F.
dc.creatorStella, L.
dc.date1999-03-19
dc.date.accessioned2026-07-07T02:30:55Z
dc.date.available2026-07-07T02:30:55Z
dc.descriptionWe present the results of optical observations performed between May and September 1998 of the stars within the position error circle of the recently discovered 12min pulsating X-ray source 1WGA J1958.2+3232. Based on photometry and slitless spectroscopy, we selected a likely optical counterpart, which was subsequently determined to be a m_V=15.7 B0Ve star, the spectral properties of which are in good agreement with the X-ray results. The proposed optical counterpart shows several H, He and Fe emission-lines, while the interstellar absorption spectral features place the star at a distance of about 800 pc.The inferred X-ray luminosity for this distance is about 10^33 erg s^-1 in the 2--10 keV band. We conclude that 1WGA J1958.2+3232 is a likely new long-period low-luminosity accreting neutron star in a Be-star/X-ray binary system.
dc.description4 pages. Accepted for publication on A&A Letters. 3 PostScript figures. A&A LaTeX macro used
dc.identifierhttps://arxiv.org/abs/astro-ph/9903302
dc.identifierhttp://arxiv.org/abs/astro-ph/9903302
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/13984
dc.subjectAstrophysics
dc.titleThe identification of the long-period X-ray pulsar 1WGA J1958.2+323 with a Be-star/X-ray binary
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