14 papers
Runaway electromagnetic cascade in shear flows and high energy radiation of astrophysical jets
B. E. Stern, J. Poutanen
We propose a straightforward and efficient mechanism of the high energy emission of astrophysical jets associated with an exchange of interacting high energy photons between the je…
GRS 1915+105: The first three months with INTEGRAL
D. C. Hannikainen, O. Vilhu, J. Rodriguez +19
GRS 1915+105 is being observed as part of an Open Time monitoring program with INTEGRAL. Three out of six observations from the monitoring program are presented here, in addition t…
Radiative Processes in Microquasars
Juri Poutanen, Andrzej A. Zdziarski
Recent advances in the X-ray and soft gamma-ray observations of accreting black holes and microquasars, in particular, are reviewed. The radiative processes responsible for the emi…
Modeling the Energy Dependent Pulse Profiles of the Accreting Millisecond Pulsar SAX J1808.4-3658
Juri Poutanen, Marek Gierlinski
The pulse profiles of the accreting X-ray millisecond pulsar SAX J1808.4-3658 at different energies are studied. The two main emission component, a black body and a power-law tail,…
A Simultaneous ASCA and RXTE Long Look at the Seyfert 1 Galaxy MCG--6-30-15
J. C. Lee, A. C. Fabian, K. Iwasawa +2
We report on a joint RXTE and ASCA observation spanning 400~ks of the Seyfert 1 galaxy MCG--6-30-15. The low energy coverage of ASCA coupled with the high energy coverage of…
One more surprise from the Circinus Galaxy: BeppoSAX discovery of a transmission component in hard X-rays
G. Matt, M. Guainazzi, R. Maiolino +11
The Circinus Galaxy has been observed, for the first time above 10 keV, by BeppoSAX. An excess emission above the extrapolation of the best fit 0.1--10 keV spectrum is apparent in…