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Heavy absorption and soft X-ray emission lines in the XMM-Newton spectrum of the Type 2 radio-loud quasar 3C 234
E. Piconcelli, S. Bianchi, G. Miniutti +4
We report results on a 40 ks XMM-Newton observation of the Type 2 quasar 3C 234. Optical spectropolarimetric data have demonstrated the presence of a hidden broad-line region in th…
Variation of the primary and reprocessed radiation in the flare-spot model
M. Dovciak, V. Karas, G. Matt +1
We study light curves and spectra (equivalent widths of the iron line and some other spectral characteristics) which arise by reprocessing on the surface of an accretion disc, foll…
Variation in the primary and reprocessed radiation from an orbiting spot around a black hole
M. Dovciak, V. Karas, G. Matt +1
We study light curves and spectra (equivalent widths of the iron line and some other spectral characteristics) which arise by reflection on the surface of an accretion disc, follow…
NGC3147: a "true" Seyfert 2 without the broad-line region
S. Bianchi, A. Corral, F. Panessa +5
We report on simultaneous optical and X-ray observations of the Seyfert galaxy, NGC3147. The XMM-Newton spectrum shows that the source is unabsorbed in the X-rays ($N_H<5\times10^{…
The HELLAS2XMM survey: XI. Unveiling the nature of X-ray Bright Optically Normal Galaxies
F. Civano, M. Mignoli, A. Comastri +8
X-ray Bright Optically Normal Galaxies (XBONGs) constitute a small but not negligible fraction of hard X-ray selected sources in recent Chandra and XMM-Newton surveys. Even though…
An X-ray Polarimeter for HXMT Mission
Enrico Costa, Ronaldo Bellazzini, Gianpiero Tagliaferri +17
The development of micropixel gas detectors, capable to image tracks produced in a gas by photoelectrons, makes possible to perform polarimetry of X-ray celestial sources in the fo…