Conveners
The population of blazars
- Elisa Prandini
The population of blazars
- Elisa Prandini
Dr
Paolo Padovani
(ESO)
22/01/2019, 14:10
Main track
Talk
The number of known extreme blazars is still quite low, hampering a detailed study of this class of sources. I will first review what has been available so far and then present the extreme blazar sample from the 3HSP catalogue (Chang, Arsioli, Giommi, Padovani, & Brandt, 2019), which includes 344 sources with nu_peak > 10^17 Hz. I will then discuss in some detail their observational...
Dr
Bruno Sversut Arsioli
(Instituto de Fisica Gleb Wataghin, Univ. Estadual de Campinas, UNICAMP - IFGW, Campinas, Brazil)
22/01/2019, 14:50
Main track
Talk
Here we present a large-scale likelihood analysis over all objects from the Third High Synchrotron Peak blazar (3HSP) sample, which includes 2011 sources. A total of ~1170 gamma-ray signatures are detectable down to a 3 sigma threshold, which includes ~180 new sources having no counterparts in previous Fermi-LAT catalogs, including the 1-2-3FGL, the 1-2-3FHL, and the most recent FL8Y. The...
Zhiyuan Pei
(PD)
22/01/2019, 15:10
Main track
Talk
I would like to present our previous work on the radio core dominance in Fermi blazars. We compiled a sample of 4437 sources with available radio core-dominance parameters defined as the ratio of the core flux densities to extended ones, namely, R = Score/Sext., which includes 696 Fermi-detected sources respect to the catalog of FL8Y, the first eight years of science data from the Fermi...
Mr
Michael Kreter
(North-West University)
22/01/2019, 15:30
Main track
Talk
High-redshift blazars (z ≥ 2.5) are one of the most powerful classes of gamma-ray sources in the Universe. These objects possess the highest jet powers and luminosities and have black-hole masses often in excess of 10^9 solar masses. In addition, high-redshift blazars are important cosmological probes and serve as test objects for blazar evolution models. Due to their large distance, their...
Silvia Raino'
(BA)
22/01/2019, 16:30
Main track
Talk
With its discovery and characterization of several hundred sources, Fermi-LAT has revolutionized our knowledge and understanding of the BL Lac population with respect to other AGNs. The multi-wavelength picture has, however, not kept up the pace of the γ-ray observations. We have selected an unbiased sample of 42 nearby (z<0.2) BL Lacs located within the SDSS footprint, independent of their...
Dr
Barbara Balmaverde
(INAF - Osservatorio astronomico di Brera)
22/01/2019, 16:50
Main track
Talk
We present a reference sample of potential TeV emitters, likely to be found in the next CTA extragalactic survey, selected from the REX catalogue. The REX project (Radio-Emitting X-ray sources) is one of the largest and best blazar collection produced by combining radio and X-ray data. Specifically, we focus here on the high-energy peaked BL Lac (HBL) population which are the expected most...
Luca Foffano
(PD)
22/01/2019, 17:10
Main track
Talk
The spectral energy distribution of blazars is dominated by non-thermal emission from the jet and consists of two main broad humps. For the extreme blazars, these two components peak in the X-ray and GeV-TeV bands, respectively. Although the number of TeV detected extreme blazars is currently very limited, recent observations have revealed that in a few of them the energy of the second peak...
