149 citations · 769 across the 19 of their papers we have counts for
5 papers · 1 filter
The Gamma-ray Blazar Quest: new optical spectra, state of art and future perspectives
F. Massaro, N. Álvarez Crespo, R. D'Abrusco +13
We recently developed a procedure to recognize gamma-ray blazar candidates within the positional uncertainty regions of the unidentified/unassociated gamma-ray sources (UGSs). Such…
Optical archival spectra of blazar candidates of uncertain type in the 3 Fermi Large Area Telescope Catalog
N. Álvarez Crespo, F. Massaro, R. D'Abrusco +10
Despite the fact that blazars constitute the rarest class among active galactic nuclei (AGNs) they are the largest known population of associated -ray sources. Many of the -r…
Optical spectroscopic observations of -ray blazar candidates VI. Further observations from TNG, WHT, OAN, SOAR and Magellan telescopes
N. Álvarez Crespo, F. Massaro, D. Milisavljevic +16
Blazars, one of the most extreme class of active galaxies, constitute so far the largest known population of -ray sources and their number is continuously growing in the Fermi c…
Optical Spectroscopic Observations of Gamma-ray Blazar Candidates. V. TNG, KPNO, and OAN Observations of Blazar Candidates of Uncertain Type in the Northern Hemisphere
N. Álvarez Crespo, N. Masetti, F. Ricci +12
The extragalactic -ray sky is dominated by emission from blazars, a peculiar class of active galactic nuclei (AGNs). Many of the -ray sources included in Fermi -Large Area Te…
Primary black hole spin in OJ287 as determined by the General Relativity centenary flare
M. J. Valtonen, S. Zola, S. Ciprini +87
OJ287 is a quasi-periodic quasar with roughly 12 year optical cycles. It displays prominent outbursts which are predictable in a binary black hole model. The model predicted a majo…