Fabio Massaro

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7 Nearly one-third of the γ-ray sources detected by Fermi are still unidentified, despite significant 8 recent progress in this effort. On the other hand, all the γ-ray extragalactic sources associated in the 9 second Fermi-LAT catalog have a radio counterpart. Motivated by this observational evidence we 10 investigate all the radio sources of the major(More)
Cosmic rays are particles (mostly protons) accelerated to relativistic speeds. Despite wide agreement that supernova remnants (SNRs) are the sources of galactic cosmic rays, unequivocal evidence for the acceleration of protons in these objects is still lacking. When accelerated protons encounter interstellar material, they produce neutral pions, which in(More)
Global warming and energy demand are nowadays becoming one of the major issues of the third millennium, mainly because human activities seem to have a clear impact on the raise of CO<sub>2</sub> emissions as never it has been experienced in the past. Among the different factors affecting CO<sub>2</sub> emissions, energy demand from buildings constitutes one(More)
We present Chandra X-ray observations of the powerful radio galaxy 3C 171, which reveal an extended region of X-ray emission spatially associated with the well-known 10-kpc scale optical emission-line region around the radio jets. We argue that the X-ray emission comes from collisionally ionized material, originally cold gas that has been shock-heated by(More)
Context. Low-frequency radio arrays are opening a new window for the study of the sky, both to study new phenomena and to better characterize known source classes. Being flat-spectrum sources, blazars are so far poorly studied at low radio frequencies. Aims. We characterize the spectral properties of the blazar population at low radio frequency, compare the(More)
MeV blazars are a sub–population of the blazar family, exhibiting larger– than–average jet powers, accretion luminosities and black hole masses. Because Department of Physics and Astronomy, Clemson University, Kinard Lab of Physics, Clemson, SC 296340978, USA INAF – Osservatorio Astronomico di Brera, via E. Bianchi 46, I–23807 Merate, Italy Indian Institute(More)
We present Chandra X-ray and VLA radio observations of the radio galaxy 3C 305. The X-ray observations reveal the details of the previously known extended X-ray halo around the radio galaxy. We show using X-ray spectroscopy that the X-ray emission is consistent with being shock-heated material and can be modelled with standard collisional-ionization models,(More)
The paper introduces a methodology that through a probabilistic characterisation of load for MV network, and implementing a life model for combined electric and thermal stresses, simulates the process of ageing of the insulating materials evaluating the expected life time of the cable. Such evaluation is necessary to the possibility of assuming less(More)
A Chandra X-ray imaging observation of the jet in Pictor A showed a feature that appears to be a flare that faded between 2000 and 2002. The feature was not detected in a follow-up observation in 2009. The jet itself is over 150 kpc long and about 1 kpc wide, so finding year-long variability is surprising. Assuming a synchrotron origin of the observed(More)