Broadband observations of the transient X-ray pulsar SAX J2103.5+4545 |
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Authors: | E V Filippova A A Lutovinov P E Shtykovsky M G Revnivtsev R A Burenin V A Aref'ev M N Pavlinsky R A Sunyaev |
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Institution: | (1) Space Research Institute, Russian Academy of Sciences, Pro fsoyuznaya ul. 84/32, Moscow, 117810, Russia;(2) Max Planck Institut für Astrophysik, Karl Schwarzschild Str. 1, Postfach 1317, D-85741 Garching, Germany |
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Abstract: | We investigated the optical, X-ray, and gamma-ray variability of the pulsar SAX J2103.5+4545. Our timing and spectral analyses of the X-ray and gamma-ray emissions from the source using RXTE and INTEGRAL data show that the shape of its spectrum in the energy range 3–100 keV is virtually independent of its intensity and the orbital phase. Based on XMM-Newton data, we accurately (5″) localized the object and determined the optical counterpart in the binary. We placed upper limits on the variability of the latter in the Hα line on time scales of the orbital and pulse periods, respectively. |
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Keywords: | X-ray pulsars neutron stars Be stars |
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