376 citations · 9.9k across the 229 of their papers we have counts for
9 papers · 1 filter
Near-infrared imaging of the host galaxies of three radio-loud quasars at z = 1.5
Renato Falomo, Jari Kotilainen, Aldo Treves
We present high spatial resolution near-infrared H-band (1.65 microns) images, taken with ISAAC on UT1 of ESO VLT, of three radio-loud quasars at z = 1.5, as a pilot study for imag…
Broad band spectrum of Cygnus X-1 in two spectral states with BeppoSAX
F. Frontera, E. Palazzi, A. A. Zdziarski +13
We report on the 0.5--200 keV spectral properties of Cyg X-1 observed at different epochs with the Narrow Field Instruments of the BeppoSAX satellite. The source was in its soft st…
Log N -- Log S distributions of accreting and cooling isolated neutron stars
S. B. Popov, M. Colpi, M. E. Prokhorov +2
We model populations of isolated neutron stars in the Galaxy following their orbital and magneto-rotational evolution. It is shown that accretors become more abundant than coolers…
Isolated Neutron Stars in the Galaxy
S. B. Popov, M. E. Prokhorov, M. Colpi +3
In this article we briefly review our recent results on evolution and properties of isolated neutron stars (INSs) in the Galaxy. As the first step we calculate a {\it census} of IN…
Two BeppoSAX observations of BL Lac
G. Tagliaferri, G. Ghisellini, M. Ravasio +14
We present the results of two ToO BeppoSAX observations of BL Lac. During the first observation we detected both the synchrotron and the Compton components. Fast time variability w…
Looking for High Energy Peaked Blazars
L. Costamante, G. Ghisellini, A. Celotti +10
Blazars can be classified on the basis of their overall Spectral Energy Distribution (SED). BL Lac objects are usually divided in LBL or HBL (Low or High energy peaked BL Lacs), ac…
The HST Survey of BL Lacertae Objects: Morphological Properties of Low redshift Host Galaxies
R. Falomo, R. Scarpa, A. Treves +1
We report on the optical properties of a sample of 30 BL Lac host galaxies in the redshift range , as derived from HST observations. All galaxies are fully resolved in…
Ultra-strong Elelctric Fields and Vacuum Breakdown: Search for an Astrophysical Scenario
Aldo Treves, Roberto Turolla, S. B. Popov
In some models of -ray bursts super-strong electric fields () have been surmized. Such large fields may provide copious pair production thr…
New Extreme Synchrotron BL Lac Objects
L. Costamante, G. Ghisellini, P. Giommi +10
We report on the BeppoSAX observations of four "extreme" BL Lacs, selected to have high synchrotron peak frequencies. All have been detected also in the PDS band. For 1ES 0120+340,…