23 citations · 25 across the 2 of their papers we have counts for
11 papers
The possibility of multi-TeV secondary gamma rays from GRB221009A
Oleg Kalashev, Felix Aharonian, Warren Essey +2
The brightest gamma ray burst (GRB) ever observed, GRB221009A, produced a surprisingly large flux of gamma rays with multi-TeV energies, which are expected to be absorbed in intera…
Understanding the spectrum of a distant blazar PKS 1424+240 and its implications
Warren Essey, Alexander Kusenko
We calculate the gamma-ray spectrum of a distant blazar, PKS 1424+240, located at redshift z > 0.6035, where the optical depth to primary gamma rays of the highest observed energie…
PeV neutrinos from intergalactic interactions of cosmic rays emitted by active galactic nuclei
Oleg E. Kalashev, Alexander Kusenko, Warren Essey
The observed very high energy spectra of distant blazars are well described by secondary gamma rays produced in line-of-sight interactions of cosmic rays with background photons. I…
TeV gamma rays from blazars beyond z=1?
Felix Aharonian, Warren Essey, Alexander Kusenko +1
At TeV energies, the gamma-ray horizon of the universe is limited to redshifts z<<1, and, therefore, any observation of TeV radiation from a source located beyond z=1 would call fo…
Time structure of gamma-ray signals generated in line-of-sight interactions of cosmic rays from distant blazars
Anton Prosekin, Warren Essey, Alexander Kusenko +1
Blazars are expected to produce both gamma rays and cosmic rays. Therefore, observed high-energy gamma rays from distant blazars may contain a significant contribution from seconda…
On weak redshift dependence of gamma-ray spectra of distant blazars
Warren Essey, Alexander Kusenko
Line-of-sight interactions of cosmic rays provide a natural explanation of the hard gamma-ray spectra of distant blazars, which are believed to be capable of producing both gamma r…