The extragalactic background light (EBL) is one of the fundamental observational quantities
in cosmology. All energy releases from resolved and unresolved extragalactic sources, and …

In this report we review the important progress made in recent years towards understanding
the experimental data on ultra-high-energy (E≳ 1 0 9 GeV) cosmic rays. We begin with a …

Magnetic reconnection can power bright, rapid flares originating from the inner
magnetosphere of accreting black holes. We conduct extremely high-resolution (5376× …

Recent detections of the starburst galaxies M82 and NGC 253 by gamma-ray telescopes
suggest that galaxies rapidly forming massive stars are more luminous at gamma-ray …

Active galactic nuclei in general, and the supermassive black hole in M87 in particular, show
bright and rapid gamma-ray flares up to energies of 100 GeV and above. For M87, the flares …

We present a catalog of γ-ray sources at energies above 10 GeV based on data from the
Large Area Telescope (LAT) accumulated during the first 3 yr of the Fermi Gamma-ray …

We present a search for spatial extension in high-latitude (>∣∣ b 5) sources in recent
Fermi point source catalogs. The result is the Fermi High-Latitude Extended Sources …

The spectra of BL Lac objects and Fanaroff–Riley I radio galaxies are commonly explained
by the one-zone leptonic synchrotron self-Compton (SSC) model. Spectral modeling of …

ABSTRACT We report the Fermi Large Area Telescope (LAT) discovery of high-energy
(MeV/GeV) γ-ray emission positionally consistent with the center of the radio galaxy M87, at …

The giant radio galaxy M 87 provides a unique environment to study relativistic plasma
outflows and the surroundings of supermassive black holes (SMBHs). Its prominent jet …