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Unresolved Gamma-Ray Sky through its Angular Power Spectrum
M. Ackermann, M. Ajello, L. Baldini +107
The gamma-ray sky has been observed with unprecedented accuracy in the last decade by the Fermi large area telescope (LAT), allowing us to resolve and understand the high-energy Un…
Search for AGN counterparts of unidentified Fermi-LAT sources with optical polarimetry: Demonstration of the technique
N. Mandarakas, D. Blinov, I. Liodakis +12
The third Fermi-LAT catalog (3FGL) presented the data of the first four years of observations from the Fermi Gamma-ray Space Telescope mission. There are 3034 sources, 1010 of whic…
Constraining the limiting brightness temperature and Doppler factors for the largest sample of radio bright blazars
I. Liodakis, T. Hovatta, D. Huppenkothen +3
Relativistic effects dominate the emission of blazar jets complicating our understanding of their intrinsic properties. Although many methods have been proposed to account for them…
Demonstration of magnetic field tomography with starlight polarization towards a diffuse sightline of the ISM
Georgia V. Panopoulou, Konstantinos Tassis, Raphael Skalidis +7
The availability of large datasets with stellar distance and polarization information will enable a tomographic reconstruction of the (plane-of-the-sky-projected) interstellar magn…
Multiwavelength Cross-Correlations and Flaring Activity in Bright Blazars
I. Liodakis, R. W. Romani, A. V. Filippenko +4
Blazars are known for their energetic multiwavelength flares from radio wavelengths to high-energy -rays. In this work, we study radio, optical, and -ray light curves of 145…
Local measurements of the mean interstellar polarization at high Galactic latitudes
R. Skalidis, G. V. Panopoulou, K. Tassis +4
We conduct a small-scale pathfinding survey designed to identify the average polarization properties of the diffuse ISM locally at the lowest dust content regions. We perform deep…