554 citations
- Institute for Nuclear ResearchRU8 papers
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7 papers · 1 filter
Hard X-ray emission lines from the decay of Ti-44 in the remnant of supernova 1987A
S. A. Grebenev, A. A. Lutovinov, S. S. Tsygankov +1
It is assumed that the radioactive decay of Ti-44 powers the infrared, optical and UV emission of supernova remnants after the complete decay of Co-56 and Co-57 (the isotopes that…
Hot accretion flow in black hole binaries: a link connecting X-rays to the infrared
Alexandra Veledina, Juri Poutanen, Indrek Vurm
Multiwavelength observations of Galactic black hole transients have opened a new path to understanding the physics of the innermost parts of the accretion flows. While the processe…
Spectral and timing properties of the accreting X-ray millisecond pulsar IGR J17511-3057
M. Falanga, L. Kuiper, J. Poutanen +6
IGR J17511-3057 is the second X-ray transient accreting millisecond pulsar discovered by INTEGRAL. It was in outburst for about a month from September 13, 2009. The broad-band aver…
X-ray spectral state is not correlated with luminosity in Holmberg II X-1
Fabien Grisé, Philip Kaaret, Hua Feng +2
The ultraluminous X-ray source (ULX) Holmberg II X-1 has been observed over 4 months in 2009/2010 by the Swift observatory. The source luminosity varied by a factor of up to 14, re…
Constraining compactness and magnetic field geometry of X-ray pulsars from the statistics of their pulse profiles
Marja Annala, Juri Poutanen
The light curves observed from X-ray pulsars and magnetars reflect the radiation emission pattern, the geometry of the magnetic field, and the neutron star compactness. We study th…
GeV breaks in blazars as a result of gamma-ray absorption within the broad-line region
Juri Poutanen, Boris Stern
Spectra of the brightest blazars detected by the Fermi Gamma-ray Space Telescope Large Area Telescope cannot be described by a simple power law model. A much better description is…