Now showing items 1-10 of 10

• #### Characterising the long-term variability of blazars in leptonic models ﻿

(MDPI, 2019)
Most research on blazar variability focuses on individual flares to explain acceleration and radiation mechanisms and improve on current models. These short-time events (being minutes, hours, or days) might not be ...
• #### The fourth catalog of active galactic nuclei detected by the Fermi large area telescope ﻿

(IOP, 2020)
The fourth catalog of active galactic nuclei (AGNs) detected by the Fermi Gamma-ray Space Telescope Large Area Telescope (4LAC) between 2008 August 4 and 2016 August 2 contains $2863$ objects located at high Galactic ...
• #### H.E.S.S. monitoring of PKS 2155-304 in 2015 and 2016 ﻿

(MDPI, 2019)
PKS 2155-304 is one of the brightest blazar located in Southern Hemisphere, monitored with H.E.S.S. since the first light of the experiment. Here we report multiwavelength monitoring observations collected during the ...
• #### The long-lasting activity in the flat spectrum radio quasar (FSRQ) CTA 102 ﻿

(MDPI, 2019)
The flat spectrum radio quasar CTA 102 ( z=1.032 ) went through a tremendous phase of variability. Since early 2016 the gamma-ray flux level has been significantly higher than in previous years. It was topped by a four ...
• #### Millimeter-wave monitoring of active galactic nuclei with the Africa millimetre telescope ﻿

(MDPI, 2019)
Active galactic nuclei are the dominant sources of gamma rays outside our galaxy and are also candidates for the source of ultra-high energy cosmic rays. In addition to being emitters of broad-band non-thermal radiation ...
• #### Multi-wavelength variability signatures of relativistic shocks in blazar jets ﻿

(IOP Publishing, 2019)
Mildly relativistic shocks that are embedded in colliding magnetohydrodynamic flows are prime sites for relativistic particle acceleration and the production of strongly variable, polarized multi-wavelength emission from ...
• #### New hard-TeV extreme blazars detected with the MAGIC telescopes ﻿

(IOP, 2020)
Extreme high-frequency-peaked BL Lac objects (EHBLs) are blazars that exhibit extremely energetic synchrotron emission. They also feature nonthermal gamma-ray emission whose peak lies in the very high-energy (VHE, E > 100 ...
• #### Optical variability modelling of newly identified blazars and blazar candidates behind Magellanic clouds ﻿

(Sissa Medialab, 2019)
We present results of a variability study in the optical band of 44 newly identified blazar candidates behind the Magellanic Clouds. Our sample contains 27 flat spectrum radio quasars (FSRQs) and 17 BL Lacertae objects (BL ...
• #### Studies of active galactic nuclei with CTA ﻿

(Elsevier, 2013)
In this paper, we review the prospects for studies of active galactic nuclei (AGN) using the envisioned future Cherenkov Telescope Array (CTA). This review focuses on jetted AGN, which constitute the vast majority of AGN ...
• #### The VHE γ-ray view of the FSRQ PKS 1510-089 ﻿

(MDPI, 2019)
The flat spectrum radio quasar PKS 1510-089 is a monitored target in many wavelength bands due to its high variability. It was detected as a very-high-energy (VHE) γ-ray emitter with H.E.S.S. in 2009, and has since been a ...

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