Zobrazeno 61 - 70
of 497
pro vyhledávání: '"Panessa, F."'
Publikováno v:
A&A 515, A99 (2010)
The relationship between star formation and super-massive black hole growth is central to our understanding of galaxy formation and evolution. Hyper-Luminous Infrared Galaxies (HLIRGs) are unique laboratories to investigate the connection between sta
Externí odkaz:
http://arxiv.org/abs/1003.0800
We study the NH distribution in a complete sample of 88 AGN selected in the 20-40 keV band from INTEGRAL/IBIS observations. We find that the fraction of absorbed (NH > 10^22 cm^-2) sources is 43% while Compton thick AGN comprise 7% of the sample. Whi
Externí odkaz:
http://arxiv.org/abs/1002.4712
Autor:
Natalucci, L., Bazzano, A., Panessa, F., Ubertini, P., Tagliaferri, G., Della Ceca, R., Ghisellini, G., Pareschi, G., Villa, G., Caraveo, P., Fiorini, M., Uslenghi, M., Grindlay, J. E., Ramsey, B.
The Soft X-ray Imager (SXI) is one of the three instruments on board EXIST, a multi-wavelength observatory in charge of performing a global survey of the sky in hard X-rays searching for Super-massive Black Holes (Grindlay & Natalucci, these Proceedi
Externí odkaz:
http://arxiv.org/abs/1002.1194
Autor:
Natalucci, L., Bazzano, A., Campana, S., Caraveo, P., Della Ceca, R., Grindlay, J. E., Panessa, F., Pareschi, G., Ramsey, B., Tagliaferri, G., Ubertini, P., Villa, G.
The SXI telescope is one of the three instruments on board EXIST, a multiwavelength observatory in charge of performing a global survey of the sky in hard X-rays searching for Supermassive Black Holes. One of the primary objectives of EXIST is also t
Externí odkaz:
http://arxiv.org/abs/0910.3605
We study the NH distribution in a complete sample of 88 AGN selected in the 20-40 keV band from INTEGRAL/IBIS observations. We find that the fraction of absorbed (NH > 10^{22} cm^2) sources is 43% while the Compton thick AGN comprise 7% of the sample
Externí odkaz:
http://arxiv.org/abs/0906.5544
Autor:
Molina, M., Bassani, L., Malizia, A., Stephen, J. B., Bird, A. J., Dean, A. J., Panessa, F., De Rosa, A., Landi, R.
In this paper we discuss the broad-band X-ray characteristics of a complete sample of 36 type 1 AGN, detected by INTEGRAL in the 20-40 keV band above the 5.5sigma level. We present, for all the objects in the sample, the broad-band (1-110 keV) spectr
Externí odkaz:
http://arxiv.org/abs/0906.2909
Autor:
Panessa, F., Carrera, F. J., Bianchi, S., Corral, A., Gastaldello, F., Barcons, X., Bassani, L., Matt, G., Monaco, L.
Hawkins (2004) reported on a class of "naked" AGN characterized by strong amplitude optical brightness variability and the complete absence of broad emission lines in the optical spectrum. The variability suggests that the nucleus is seen directly, h
Externí odkaz:
http://arxiv.org/abs/0906.1974
Autor:
Miniutti, G., Panessa, F., De Rosa, A., Fabian, A. C., Malizia, A., Molina, M., Miller, J. M., Vaughan, S.
We have observed the hard X-ray selected Narrow-Line Seyfert 1 galaxy SWIFT J2127.4+5654 with Suzaku. We report the detection of a broad relativistic iron emission line from the inner accretion disc. By assuming that the inner edge of the accretion d
Externí odkaz:
http://arxiv.org/abs/0905.2891
IGR J16351-5806 has been associated with the Seyfert 2 galaxy ESO 137-G34, having been first reported as a high energy emitter in the third INTEGRAL/IBIS survey. Using a new diagnostic tool based on X-ray column density measurements vs softness ratio
Externí odkaz:
http://arxiv.org/abs/0901.2215
Autor:
Molina, M., Bassani, L., Malizia, A., Bird, A. J., Dean, A. J., Fiocchi, M., Panessa, F., De Rosa, A., Landi, R.
Starting from a complete sample of type I AGN observed by INTEGRAL in the 20-40 keV band, we have selected a set of 8 AGN which can be classified as radio loud objects according to their 1.4 GHz power density, radio to hard X-ray flux flux density ra
Externí odkaz:
http://arxiv.org/abs/0809.0255