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Wind accretion in symbiotic X-ray binaries
K. Postnov, N. Shakura, A. González-Galán +7
The properties of wind accretion in symbiotic X-ray binaries (SyXBs) consisting of red-giant and magnetized neutron star (NS) are discussed. The spin-up/spin-down torques applied t…
Swift observations of the March 2011 outburst of the cataclysmic variable NSV 1436: a probable dwarf nova (Research Note)
J. P. Osborne, K. L. Page, A. A. Henden +7
The March 2011 outburst of the poorly-studied cataclysmic variable NSV 1436 offered an opportunity to decide between dwarf nova and recurrent nova classifications. We use seven dai…
First simultaneous multi-wavelength observations of the black hole candidate IGR J17091-3624: ATCA, INTEGRAL, Swift, and RXTE views of the 2011 outburst
J. Rodriguez, S. Corbel, I. Caballero +5
We present the results of the first four (quasi-)simultaneous radio (ATCA), X-ray (Swift, RXTE), and Gamma-ray (INTEGRAL) observations of the black hole candidate IGR J17091-3624,…
The remarkable gamma-ray activity in the gravitationally lensed blazar PKS 1830-211
I. Donnarumma, A. De Rosa, V. Vittorini +34
We report the extraordinary gamma-ray activity (E>100 MeV) of the gravitationally lensed blazar PKS 1830-211 (z=2.507) detected by AGILE between October and November 2010. The sour…
Mass and radius estimation for the neutron star in X-ray burster 4U 1820-30
K. Kusmierek, J. Madej, E. Kuulkers
We present a new method for determining masses and radii of neutron stars residing in thermo-nuclear X-ray burst sources. To illustrate this method we apply it to a burst from the…