The Optical-Radio Mapping: the kinetic efficiency of Radio-Loud AGNs (2007)
Shankar, Francesco, Cavaliere, Alfonso, Cirasuolo, Michele, Maraschi, Laura
We constrain the mean kinetic efficiency of radio-loud active galactic nuclei by using an optically selected sample for which both the optical and the radio luminosity functions (LFs) have been...
Shedding new light on the 3C 273 jet with the Spitzer Space Telescope (2006)
Uchiyama, Yasunobu, Urry, C. Megan, Cheung, C. C., Jester, Sebastian, Van Duyne, Jeffrey, Coppi, Paolo, ...
We have performed infrared imaging of the jet of the quasar 3C 273 at wavelengths of 3.6 and 5.8 mum with the Infrared Array Camera (IRAC) on the Spitzer Space Telescope. When combined with the...
Detection of X-ray Emission from the Eastern Radio Lobe of PICTOR A (2002)
Grandi, Paola, Guainazzi, Matteo, Maraschi, Laura, Morganti, Raffaella, Fusco-Femiano, Roberto, Fiocchi, Mariateresa, ...
The XMM-Newton satellite has revealed extended X-ray emission from the eastern radio lobe of the Fanaroff-Riley II Radio Galaxy Pictor A. The X-ray spectrum, accumulated on a region covering about...
The Jet-Disk Connection and Blazar Unification (2002)
Maraschi, Laura, Tavecchio, Fabrizio
We discuss the relation between the power carried by relativistic jets and the nuclear power provided by accretion, for a group of blazars including FSRQs and BL Lac objects. They are characterized...
High Energy Phenomena in Blazars (2001)
Advances in the capabilities of X-ray, gamma-ray and TeV telescopes have brought new information on the physics of relativistic jets, which are responsible for the blazar "phenomenon". In particular...
Weak Reprocessed Features in the Broad Line Radio Galaxy 3C382 (2001)
Grandi, Paola, Maraschi, Laura, Urry, C. Meg, Matt, Giorgio
We present a detailed X-ray study of the Broad Line Radio Galaxy 3C382, observed with the BeppoSAX satellite in a very bright state. The continuum emission is well modeled with a power law that...
X-rays from Radio-Galaxies: BeppoSAX Observations (2000)
Grandi, Paola, Urry, C. Meg, Maraschi, Laura
We briefly review BeppoSAX observations of X-ray bright radio-galaxies. Their X-ray spectra are quite varied, and perhaps surprisingly, any similarity between radio-loud AGN and Seyfert galaxies is...
Falomo, Renato, Maraschi, Laura, Pian, Elena, Treves, Aldo
The contribution of an astrophysics group based in Milan to the science with the IUE satellite during its almost 20 years lifetime has focussed on high energy sources, of both galactic (LMXRB, HMXRB,...
Pian, Elena, Malaguti, Giuseppe, Maraschi, Laura, Ghisellini, Gabriele, Palumbo, Giorgio G. C.
Only ~10 blazars have been detected in soft gamma-rays by OSSE and the PDS, often in flaring state. We investigate the impact of the imaging and spectral capabilities of the IBIS instrument on board...
BeppoSAX Observations of the BL Lac Object Mkn 501 in an Intermediate State (1998)
Pian, Elena, Palazzi, Eliana, Chiappetti, Lucio, Maraschi, Laura, Tavecchio, Fabrizio, Ghisellini, Gabriele, ...
The BL Lac object Mkn 501 was observed with the BeppoSAX satellite at three epochs in April-May 1998, simultaneously with the Whipple and HEGRA Cherenkov telescopes. The X-ray spectrum is well...
Multifrequency and IUE Campaigns on Blazars (1998)
The IUE contribution to the understanding of the blazar phenomenon has been of fundamental importance. Here I review the progress obtained with the latest multifrequency campaigns performed with IUE...
BeppoSAX Observations of Unprecedented Synchrotron Activity in the BL Lac Object Mkn 501 (1997)
Pian, Elena, Vacanti, Giuseppe, Tagliaferri, Gianpiero, Ghisellini, Gabriele, Maraschi, Laura, Treves, Aldo, ...
The BL Lac object Mkn 501, one of the only three extragalactic sources (with Mkn 421 and 1ES 2344+514) so far detected at TeV energies, was observed with the BeppoSAX satellite on 7, 11, and 16 April...
Pian, Elena, Urry, C. Megan, Treves, Aldo, Maraschi, Laura, Penton, Steve, Shull, J. Michael, ...
PKS 2155-304, the brightest BL Lac object in the ultraviolet sky, was monitored with the IUE satellite at ~1 hour time-resolution for ten nearly uninterrupted days in May 1994. The campaign, which...
Spectral Energy Distributions of Gamma-ray Blazars (1996)
Maraschi, Laura, Fossati, Giovanni
Average Spectral Energy Distributions (SED) for different subgroups of blazars are derived from available homogeneous (but small) data sets, including the gamma-ray band. Comparing Flat Spectrum...
Disk-Corona Models and X-ray Emission from Seyfert Galaxies (1996)
Maraschi, Laura, Haardt, Francesco
The current status of understanding of the X-ray emission from Seyfert galaxies involves Comptonization of soft photons by hot subrelativistic electrons. After briefly reviewing the early theoretical...
X-ray variability and correlations in the two phase disk-corona model for Seyfert galaxies (1996)
Haardt, Francesco, Maraschi, Laura, Ghisellini, Gabriele
We discuss in detail the broad band X-ray variability expected in Seyfert galaxies in the framework of a Compton cooled corona model. Variations in the optical depth tau of the corona cause spectral...
A Model for the X-Ray and UV Emission from Seyfert Galaxies and Galactic Black Holes (1994)
Haardt, Francesco, Maraschi, Laura, Ghisellini, Gabriele
We propose that the X--ray emission from radio quiet AGN and galactic black holes is due to Comptonization of soft thermal photons emitted by the underlying accretion disk in localized structures...