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Close eclipsing binary BD And: a triple system
Perdelwitz, V.; Kundra, E.; Guenther, E. +5 more
BD And is a fairly bright (V = 10.8), active and close (P ∼ 0.9258 days) eclipsing binary. The cyclic variability of the apparent orbital period as well as third light in the light curves indicate the presence of an additional late-type component. The principal aim is the spectroscopic testing of the third-body hypothesis and determination of abso…
First results from the use of the relativistic and slim disc model SLIMULX in XSPEC
Castro-Tirado, A. J.; Dovčiak, M.; Karas, V. +3 more
Ultra-Luminous X-ray sources (ULXs) are accreting black holes for which their X-ray properties have been seen to be different to the case of stellar-mass black hole binaries. For most of the cases their intrinsic energy spectra are well described by a cold accretion disc (thermal) plus a curved high-energy emission components. The mass of the blac…