2 citations · 3 across the 3 of their papers we have counts for
6 papers · 1 filter
Surveys and the Blazar Parameter Space
E. S. Perlman, P. Padovani, H. Landt +5
The rareness of blazars, combined with the previous history of relatively shallow, single-band surveys, has dramatically colored our perception of these objects. Despite a quarter-…
The Cosmological Evolution of BL Lacertae Objects
P. Giommi, A. Pellizzoni, M. Perri +1
We review the main results from several radio, X-ray and multi-frequency surveys on the topic of cosmological evolution of BL Lacertae objects. Updated findings on BL Lac evolution…
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 BeppoSAX 2-10 keV Survey
P. Giommi, M. Perri, F. Fiore
We present the results of a 2-10 keV BeppoSAX survey based on 140 high galactic latitude MECS fields, 12 of which are deep exposures of ``blank'' parts of the sky. The limiting sen…
Extragalactic 2-10 keV source counts from a fluctuation analysis of deep BeppoSAX MECS images
M. Perri, P. Giommi
We present an analysis of the spatial fluctuations of the 2-10 keV Cosmic X-ray Background (CXB) as measured from 22 high galactic latitude (|b| > 25 deg) fields observed with the…