512 citations · 3.7k across the 117 of their papers we have counts for
11 papers · 2 filters
Identification of New Gamma-Ray Blazar Candidates With Multifrequency Archival Observations
Philip S. Cowperthwaite, F. Massaro, R. D'Abrusco +3
Blazars are a highly-variable, radio-loud subclass of active galactic nuclei (AGN). In order to better understand such objects we must be able to easily identify candidate blazars…
Blazars spectral properties at 74 MHz
F. Massaro, M. Giroletti, A. Paggi +3
Blazars are the most extreme class of active galactic nuclei (AGNs). Despite a previous investigation at 102 MHz for a small sample of BL Lacs and our recent analysis of blazars de…
Unveiling the nature of the unidentified gamma-ray sources III: gamma-ray blazar-like counterparts at low radio frequencies
F. Massaro, R. D'Abrusco, M. Giroletti +5
About one third of the gamma-ray sources listed in the second Fermi LAT catalog (2FGL) have no firmly established counterpart at lower energies so being classified as unidentified…
Searching for new gamma-ray blazar candidates in the 3rd Palermo BAT Hard X-ray Catalog with WISE
A. Maselli, F. Massaro, G. Cusumano +6
We searched for gamma-ray blazar candidates among the 382 unidentified hard X-ray sources of the 3rd Palermo BAT Catalog (3PBC) obtained from the analysis of 66 months of SWIFT-BAT…
BL Lac candidates for TeV observations
F. Massaro, A. Paggi, M. Errando +4
BL Lac objects are the most numerous class of extragalactic TeV-detected sources. One of the biggest difficulties in investigating their TeV emission resides in their limited numbe…
A Chandra Snapshot Survey for 3C Radio Galaxies with redshifts between 0.3 and 0.5
F. Massaro, D. E. Harris, G. Tremblay +3
This paper contains an analysis of short Chandra observations of 19 3C sources with redshifts between 0.3 and 0.5 not previously observed in the X-rays. This sample is part of a pr…
Unveiling the nature of the unidentified gamma-ray sources II: radio, infrared and optical counterparts of the gamma-ray blazar candidates
F. Massaro, R. D'Abrusco, A. Paggi +5
A significant fraction (~30%) of the high-energy gamma-ray sources listed in the second Fermi LAT catalog (2FGL) are still of unknown origin, being not yet associated with counterp…
Unveiling the nature of the unidentified gamma-ray sources
F. Massaro, R. D'Abrusco, A. Paggi +4
One of the main scientific objectives of the recent Fermi mission is investigating the origin of the unidentified gamma-ray sources (UGSs). Despite the large improvements of Fermi…
Unveiling the nature of the unidentified gamma-ray sources I: a new method for the association of gamma-ray blazars
R. D'Abrusco, F. Massaro, A. Paggi +4
We present a new method for identifying blazar candidates by examining the locus, i.e. the region occupied by the Fermi gamma-ray blazars in the three-dimensional color space defin…
A new method for the extraction of mid-infrared gamma-ray emitting candidate blazars
R. D'Abrusco, F. Massaro, A. Paggi +4
We present a new method for identifying blazar candidates by examining the locus, i.e. the region occupied by the Fermi gamma-ray blazars in the three-dimensional color space defin…
Two Compton-Thick Active Nuclei in Arp 220?
Alessandro Paggi, Giuseppina Fabbiano, Guido Risaliti +2
Narrow-band spectral imaging with sub-pixel resolution of the Chandra-ACIS archival observation of the ULIRG merger Arp 220 strongly suggests two Compton thick nuclei, spatially co…