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Multi-wavelength observations of flaring blazars with ATOM and Fermi-LAT
(Sissa Medialab, 2017)
The Automatic Telescope for Optical Monitoring is a 75cm optical telescope located at the H.E.S.S. site in Namibia. Since 2005, it monitors around 250 gamma-ray emitting AGN and has observed numerous blazar flares in several ...
Blazar variability -- expect the unexpected
(Sissa Medialab, 2018)
Despite significant progress in both data taking and the development of theory, blazars keep offering surprises. While many frequency bands are now covered by long-term monitoring efforts on at least a few selected sources, ...
Unraveling the complex nature of the very high-energy γγ-ray blazar PKS 2155-304
(Sissa Medialab, 2019)
PKS 2155-304 is a blazar located in the Southern Hemisphere, monitored with the High Energy Stereoscopic System (H.E.S.S.) at very high energy (VHE, E>100 GeV) γ rays every year since 2002. Thanks to the large data set ...
CTA 102 - Year over year receiving you
(Sissa Medialab, 2019)
The FSRQ CTA 102 (z=1.032) has been tremendously active over the last few years. During
its peak activity lasting several months in late 2016 and early 2017, the gamma-ray and optical
fluxes rose by up to a factor 100 ...
Monitoring of the FSRQ PKS 1510-089 with H.E.S.S.
(PoS, 2017)
The flat spectrum radio quasar (FSRQ) PKS 1510-089 (z=0.361) is known for its complex multiwavelength
behavior. It has been monitored regularly at very high energy (VHE, E > 100GeV)
gamma-rays with H.E.S.S. since its ...
The FSRQ PKS 1510-089: the gamma-ray-synchrotron connection
(PoS, 2017)
The flat spectrum radio quasar (FSRQ) PKS 1510-089 (z=0.361) is known for its complex multiwavelength
behaviour. Since 2015, it has been very active across the entire electromagnetic spectrum.
This has lead to joint ...
The exceptional VHE gamma-ray outburst of PKS 1510-089 in May 2016
(PoS, 2017)
PKS 1510-089 (z=0.361) is one of only a handful of flat spectrum radio quasars that have been
detected at very high energy (VHE, E > 100GeV) gamma rays. It is a very active source across
the entire electromagnetic spectrum. ...
Implications of time-dependent injection in relativistic jets
(AIP, 2017)
Rapid blazar flaring events and their rich behavior require time-dependent modeling. One important approach is time-dependent injection causing non-linear cooling effects, since the inevitable SSC cooling depends on the ...
The extended jet in AP Librae as the source of the VHE γ-ray emission
(AIP, 2017)
Most modeling attempts of blazars use a small emission zone located close to the central black hole in order to explain the broad-band spectral energy distribution. Here we present a case where additionally to the small ...