Search Publications
Unveiling the nature of the new transient IGR J19140+0951
Petrucci, P. -O.; Rodriguez, J.; Henri, G. +5 more
IGR J19140+0951 was discovered during the first observation campaign of the famous microquasar GRS1915+105 (PI Hannikainen) by INTEGRAL IBIS/ISGRI instrument. The source, which is 1o from GRS1915+105 (corrected position), shows high variations of its X-ray luminosity and spectral variations on timescales from seconds to hours. According…
Exploring the INTEGRAL Sources in Search for New Microquasars
Mirabel, I. F.; Combi, J. A.; Ribó, M.
Here we present a search for new microquasars among the sources detected with the INTEGRAL satellite (IGR sources). We focus on radio emitting IGR sources and report the discovery of two new probable extragalactic sources behind the galactic plane, as well as the detection at higher energies of the ASCA source AX J1639.0-4642, probably a new micro…
The Properties of the Absorbing and Line Emitting Material in IGR J16318-4848
Guainazzi, M.; Matt, Giorgio
We analyzed the 2003 Target of Opportunity XMM-Newton observation of IGR J16318-4848, to derive the properties of the matter responsible for the obscuration and for the emission of Fe and Ni lines. The line of sight material has a column density of about 2×1024 cm-2 but, from the Fe Kα line EW and Compton Shoulder, we argue t…
Broad Iron Lines in Active Galactic Nuclei
Reynolds, C. S.; Kendziorra, E.; Wilmsn, J.
The Fe Kα lines seen in many Active Galactic Nuclei (AGN) are thought to originate close to the central supermassive black hole. In this review we summarize the physics of the fluorescent line formation and show that Fe Kα line profile observations can be used to probe relativistic effects in the vicinity of the black hole, concentrating on recent…
Multifrequency study of the very slow nova V723 Cas
Chochol, D.; Vittone, A. A.; Pribulla, T.
Multifrequency behaviour of the very slow nova V723 Cas is reviewed. The long-term photometry of the object revealed the orbital period 0.693265 days of the binary, quasi-periodic oscillations in the envelope of the burst white dwarf and 182 days periodicity of activity due to the mass transfer bursts from the red to the white dwarf probably cause…