498 citations · 536 across the 7 of their papers we have counts for
8 papers · 1 filter
Optical spectroscopic observations of low-energy counterparts of Fermi-LAT gamma-ray sources
H. A. Peña-Herazo, R. A. Amaya-Almazán, F. Massaro +15
A significant fraction of all -ray sources detected by the Large Area Telescope aboard the \fer\ satellite is still lacking a low-energy counterpart. In addition, there is still…
Optical spectroscopic classification of 35 hard X-ray sources from the Swift-BAT 70-month catalogue
E. J. Marchesini, N. Masetti, E. Palazzi +15
The nature of a substantial percentage (about one fifth) of hard X-ray sources discovered with the BAT instrument onboard the Neil Gehrels Swift Observatory (hereafter Swift) is un…
The -ray sky seen at X-ray energies II: the Swift hunt of Fermi BL Lac objects among unidentified gamma-ray sources
E. J. Marchesini, A. Paggi, F. Massaro +3
Nearly 50% of all sources detected by the Fermi Large Area Telescope are classified as blazars or blazar candidates, one of the most elusive classes of active galaxies. Additional…
Fermi Large Area Telescope Fourth Source Catalog Data Release 2
J. Ballet, T. H. Burnett, S. W. Digel +1
We present an incremental version (4FGL-DR2, for Data Release 2) of the fourth Fermi-LAT catalog of gamma-ray sources. Based on the first ten years of science data in the energy ra…
The -ray sky seen at X-ray energies I. Searching for the connection between X-rays and -rays in Fermi BL Lac objects
E. J. Marchesini, A. Paggi, F. Massaro +4
BL Lac objects are an extreme type of active galactic nuclei (AGNs) that belong to the largest population of -ray sources: blazars. This class of AGNs shows a double-bumped spec…
Optical spectroscopic observations of gamma-ray blazar candidates. X. Results from the 2018--2019 SOAR and OAN-SPM observations of blazar candidates of uncertain type
Raniere de Menezes, Raul A. Amaya-Almazán, Ezequiel J. Marchesini +14
The fourth Fermi Large Area Telescope Source Catalog (4FGL) lists over 5000 gamma-ray sources with statistical significance above 4. About 23% of the sources listed in this cata…