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Dr
Amit Shukla
(Institut für Theoretische Physik und Astrophysik, Universität Würzburg)
12/9/16, 2:00 PM
Oral
Blazars are a subclass of Active Galactic Nuclei (AGN) characterized by non-thermal emission extending from radio to high energies. The broadband radiation originates within a relativistic jet that is oriented very close to the line of sight. Radiative processes of Blazars can be studied using ASTROSAT.
ASTROSAT is India's first multi-wavelength astronomy satellite in a 650-km,...
Dr
Felicia Krauss
(GRAPPA & API, UvA)
12/9/16, 2:20 PM
HAP Workshop
Oral
Active galactic nuclei often show relativistic outflows of matter, called jets. We study their simultaneous radio to gamma-ray spectral energy distributions (SEDs) from the
TANAMI sample, with over 80 SEDs for 22 sources. The large amount of monitoring data from the TANAMI project allows us to construct dynamic SEDs, highlighting spectral changes in varying flux states. With the data, we can...
Dr
Shan Gao
(DESY)
12/9/16, 2:40 PM
HAP Workshop
Oral
We study the frequently used assumption in multi-messenger astrophysics that the gamma-ray and neutrino fluxes are directly connected because they are assumed to be produced by the same photohadronic production chain. An interesting candidate source for this test is the flat-spectrum radio quasar PKS B1424-418, which recently called attention of a potential correlation between an IceCube...
Dr
Volodymyr Savchenko
(APC)
12/9/16, 3:30 PM
HAP Workshop
Oral
Observations of the INTErnational Gamma-Ray Astrophysics Laboratory (INTEGRAL) allow us to put upper limits on the gamma-ray and hard X-ray emission associated with the gravitational wave events, reported by LIGO/Virgo collaboration, as well as with exceptional high energy neutrino events detected by IceCube. Large duty cycle of INTEGRAL, stable background, and...
Daniel Kuempel
(RWTH Aachen University)
12/9/16, 3:50 PM
HAP Workshop
Oral
The Pierre Auger Observatory, located in Argentina, provides an unprecedented integrated aperture for the search of photons with energy above 100 PeV. In this contribution recent results are presented with a focus on directional searches for photon point sources. The derived limits are of considerable astrophysical interest: Diffuse limits place severe constraints on top-down models and start...
