220 citations · 1.1k across the 36 of their papers we have counts for
37 papers
The mystery of spectral breaks: Lyman continuum absorption by photon-photon pair production in the Fermi GeV spectra of bright blazars
Boris E. Stern, Juri Poutanen
We reanalyze Fermi/LAT gamma-ray spectra of bright blazars with a higher photon statistics than in previous works and with new Pass 7 data representation. In the spectra of the bri…
Fermi Observations of Blazars: Implications for Gamma-ray Production
Juri Poutanen, Boris E. Stern
The brightest blazars detected by the Fermi Gamma-ray Space Telescope Large Area Telescope (Fermi/LAT) show significant breaks in their spectra at a few GeV. The sharpness and the…
Variation of the gamma-gamma opacity by the He II Lyman continuum constrains the location of the gamma-ray emission region in the blazar 3C 454.3
Boris E. Stern, Juri Poutanen
We study spectral properties of the brightest gamma-ray blazar 3C454.3 using 138 weeks of observations by the Fermi Gamma-ray Space Telescope (Fermi). We probe the behaviour of the…
GeV breaks in blazars as a result of gamma-ray absorption within the broad-line region
Juri Poutanen, Boris Stern
Spectra of the brightest blazars detected by the Fermi Gamma-ray Space Telescope Large Area Telescope cannot be described by a simple power law model. A much better description is…
Ultimate synchrotron cutoff in gamma-ray spectra of blazars as a signature of the converter mechanism
Boris E. Stern, Yana Y. Tikhomirov
There is a robust upper limit on the energy of synchrotron radiation in high-energy astrophysics: , where is the fine structure constant and the…
Photon breeding mechanism in relativistic jets: astrophysical implications
Juri Poutanen, Boris E. Stern
Photon breeding in relativistic jets involves multiplication of high-energy photons propagating from the jet to the external environment and back with the conversion into electron-…