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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 ...
Time-dependent, multi-wavelength shock acceleration models for active flares of 3C 279
(Sissa Medialab, 2019)
Jets in blazars are an excellent forum for studying acceleration at relativistic shocks using the
highly-variable emission seen across the electromagnetic spectrum. Our recent work on combining multi-wavelength leptonic ...
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 ...
Constraining the environment of neutrino-emitting regions in jets of FSRQs
(Sissa Medialab, 2019)
Recently, the gamma-ray blazar TXS 0506+056 has been proposed as the source of neutrino
events detected by IceCube in 2014-15 and 2017. This has further pushed the idea of blazar jets
being among those cosmic sites where ...
GRB observations with H.E.S.S.
(Sissa Medialab, 2019)
Fermi-LAT observations have proven that GeV γ-ray emission is a relatively common feature for
many Gamma Ray Bursts (GRB). However the low effective area of space detectors implies low
statistics for high-energy photons ...
Calorimetric neutrino expectations from bright blazar flares
(Sissa Medialab, 2019)
Blazar jets are extreme environments, in which relativistic proton interactions with an ultraviolet
photon field could give rise to photopion production. High-confidence associations of individual
high-energy neutrinos ...
Search for High-redshift Blazars with Fermi/LAT
(Sissa Medialab, 2019)
High-redshift blazars (z ≥ 2.5) are one of the most powerful classes of γ-ray sources in the Universe. These objects possess the highest jet powers and luminosities and have black-hole masses
often in excess of 109
solar ...