Discovery of a faint 437 s X-ray pulsar 1SAX J1452.8-5949

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dc.creatorOosterbroek, T.
dc.creatorOrlandini, M.
dc.creatorParmar, A. N.
dc.creatorAngelini, L.
dc.creatorIsrael, G. L.
dc.creatorFiume, D. Dal
dc.creatorMereghetti, S.
dc.creatorSantangelo, A.
dc.creatorCusumano, G.
dc.date1999-10-21
dc.date.accessioned2026-07-07T02:33:58Z
dc.date.available2026-07-07T02:33:58Z
dc.descriptionA new pulsar, 1SAX J1452.8-5949, was discovered during a BeppoSAX galactic plane survey on 1999 July 20 at R.A.=14h 52m 49s, Dec=-59 49' 18'' (J2000) with a 90% confidence uncertainty radius of 50''. Coherent pulsations were detected with a barycentric period of a 437.4 +/- 1.4 s. The X-ray spectrum can be modeled by a power-law with a photon index of 1.4 +/- 0.6 and absorption consistent with the galactic value in the direction of the source ($1.9 \times 10^{22}$ atom cm$^{-2}$). An Fe K line with a equivalent width of $\approxgt$1.3 keV may be present in the spectrum. The unabsorbed 2-10 keV flux is $9 \times 10^{-13}$ erg cm$^{-2}$s$^{-1}$. The X-ray properties and lack of an obvious optical counterpart are consistent with a Be star companion at a distance of between approximately 6 and 12 kpc which implies a luminosity of (4-15)$\times 10^{33}$ erg s$^{-1}$.
dc.descriptionAccepted for publication in Astronomy and Astrophysics Letters
dc.identifierhttps://arxiv.org/abs/astro-ph/9910384
dc.identifierhttp://arxiv.org/abs/astro-ph/9910384
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/15061
dc.subjectAstrophysics
dc.titleDiscovery of a faint 437 s X-ray pulsar 1SAX J1452.8-5949
dc.typetext

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