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- Istituto Nazionale di Fisica Nucleare, Sezione di MilanoIT369 papers
- Brera Astronomical ObservatoryIT367 papers
- National Institute for AstrophysicsIT354 papers
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19 papers · 2 filters
The black hole mass of BL Lacs from stellar velocity dispersion of the host galaxy
Renato Falomo, Jari Kotilainen, Aldo Treves
We present the first results from our on-going program to estimate black hole masses [M(BH)] of nearby BL Lac objects. The estimates are based on stellar velocity dispersion (sigma…
Spectral Energy Distributions of 3C 279 revisited: BeppoSAX observations and variability models
L. Ballo, L. Maraschi, F. Tavecchio +9
We present the BeppoSAX observations of 3C 279 performed in 1997 January 13-23 simultaneously with gamma-ray pointings with EGRET on board CGRO and optical observations at the Tori…
The Luminosity Function of the Host Galaxies of QSOs and BL Lac Objects
N. Carangelo, R. Falomo, A. Treves
A clear insight of the galaxies hosting active galactic nuclei is of fundamental importance for understanding the processes of galaxies and nuclei formation and their cosmic evolut…
The optical afterglow of GRB 000911: evidence for an associated supernova?
D. Lazzati, S. Covino, G. Ghisellini +14
We present photometric and spectroscopic observations of the late afterglow of GRB 000911, starting ~1 day after the burst event and lasting ~8 weeks. We detect a moderately signif…
1RXS J214303.7+065419/RBS 1774: A New Isolated Neutron Star Candidate
L. Zampieri, S. Campana, R. Turolla +5
We report on the identification of a new possible Isolated Neutron Star candidate in archival ROSAT observations. The source 1RXS J214303.7+065419, listed in the ROSAT Bright Surve…
The effects of a comptonizing corona on the appearance of the reflection components in accreting black hole spectra
P. O. Petrucci, A. Merloni, A. Fabian +2
We discuss the effects of a comptonizing corona on the appearance of the reflection components, and in particular of the reflection hump, in the X-rays spectra of accreting black h…