Conveners
Observational results
- Paolo Padovani
Observational results
- Paolo Padovani
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Dr David Paneque (SLAC/Kipac)23/01/2019, 09:00TalkOwing to their brightness and proximity (z=0.03), Mrk 421 and Mrk 501 are among the blazars that can be studied with the greatest level of detail; and hence a sort of astrophysical laboratories to study the blazar's phenomena. In the conference I will report recent highlight results obtained from multiwavelength campaigns on these two objects. I will show that they can change their personality...Go to contribution page
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Dr Marina Manganaro (University of Rijeka)23/01/2019, 09:30Main trackTalkThe BL Lac object 1ES 2344+51.4 was one of the first sources to be included in the EHBL (Extreme High-peaked BL Lac) family: its broadband Spectral Energy Distribution (SED) features the synchrotron peak in the hard X-ray band, and from previous studies of the object in the VHE (Very-high-energy, E>100GeV) gamma-ray range, its Inverse Compton (IC) peak is expected at ~200GeV. 1ES 2344+51.4...Go to contribution page
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Orel Gueta (DESY)23/01/2019, 09:50Main trackTalkThe VERITAS array of imaging atmospheric Cherenkov telescopes has collected nearly 5000 hours of active galactic nuclei (AGN) observations. It has detected 39 very-high-energy (VHE, >100 GeV) AGNs at redshifts up to z = 0.9, of which 24 are classified as high-frequency-peaked BL Lacertae objects (HBLs). VERITAS has obtained an extensive dataset of HBL and extreme HBL (xHBL) observations, with...Go to contribution page
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Mr Vandad Fallah Ramazani (Tuorla observatory)23/01/2019, 10:10Main trackTalkExtreme blazars (EHBLs) are generally characterized by a synchrotron peak located at energies > 1 keV in their SED, and by the hardness of their spectrum in the high-energy (HE, E > 100 MeV) gamma-ray range. So far, only a handful of these objects have been detected in very-high-energy (VHE, E > 100 GeV) gamma rays by imaging atmospheric Cherenkov telescopes (IACTs). Some such objects (e.g....Go to contribution page
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Dr Rocco Lico (Max Planck Institute for Radio Astronomy (MPIfR))23/01/2019, 11:10Main trackTalkIn this talk we will discuss the time variable rotation measure (RM) observed in the core region of the TeV blazar Markarian 421 (Mrk 421). These results are based on a one-year, multi-frequency (15, 24, and 43 GHz) Very Long Baseline Array monitoring campaign. We explore the possible connection between the RM and the accretion rate and we investigate the Faraday screen properties and its...Go to contribution page
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Dr Carolina Casadio (Max-Planck-Institut für Radioastronomie)23/01/2019, 11:30Main trackTalkInvestigating the magnetic field structure in the innermost regions of relativistic jets is fundamental to shed light on the crucial physical processes giving rise to the jet formation, as well as to their extraordinary radiation output up to gamma-ray energies. We study the variability and magnetic field structure of the quasar CTA 102 with 3 and 7 mm-VLBI polarimetric observations during a...Go to contribution page
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Dr Elena Nokhrina (Moscow Institute of Physics and Technology)23/01/2019, 11:50Main trackTalkRecent observations of blazars with RadioAstron program revealed the jets with brightness temperatures exceeding the limiting equipartition value of 10^{11.5} K. This means that the jet physical parameters depart from their equipartition values. We propose that the non-equipartition jet parameters can be estimated by using the measurements of both the brightness temperature and the core shift...Go to contribution page
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Dr Dmitry Blinov (University of Crete)Main trackTalkAfter 5 years of polarimetric monitoring of blazars, the RoboPol project has uncovered several key characteristics of polarimetric rotations in the optical for these most variable sources. The most important of these is that polarization properties of the synchrotron emission in the optical appear to be directly linked with gamma-ray activity. We will discuss the evidence for this connection,...Go to contribution page