Conveners
The population of blazars
- Elisa Prandini
The population of blazars
- Elisa Prandini
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Dr Paolo Padovani (ESO)22/01/2019, 14:10Main trackTalk
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...
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Dr Bruno Sversut Arsioli (Instituto de Fisica Gleb Wataghin, Univ. Estadual de Campinas, UNICAMP - IFGW, Campinas, Brazil)22/01/2019, 14:50Main trackTalkHere 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...Go to contribution page
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Zhiyuan Pei (PD)22/01/2019, 15:10Main trackTalkI 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...Go to contribution page
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Mr Michael Kreter (North-West University)22/01/2019, 15:30Main trackTalkHigh-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...Go to contribution page
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Silvia Raino' (BA)22/01/2019, 16:30Main trackTalkWith 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...Go to contribution page
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Dr Barbara Balmaverde (INAF - Osservatorio astronomico di Brera)22/01/2019, 16:50Main trackTalkWe 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...Go to contribution page
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Luca Foffano (PD)22/01/2019, 17:10Main trackTalkThe 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...Go to contribution page
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Yu-Ling Chang (N/A)Main trackTalkBlazars are the most possible counterpart for very high energy detections. Observations have shown that HSPs play a crucial role in TeV/VHE astronomy, and we built a HSP catalog, 3HSP, contains ~2000 HSP candidates, based on multi-frequencies data to provide candidates for future TeV instruments. HSP catalog provides good candidates for the search of sources in VHE band. A tool, VOU-Blazars,...Go to contribution page