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Greg Madejski

Researcher at Goddard Space Flight Center

Publications -  22
Citations -  2021

Greg Madejski is an academic researcher from Goddard Space Flight Center. The author has contributed to research in topics: Blazar & Quasar. The author has an hindex of 15, co-authored 22 publications receiving 1916 citations. Previous affiliations of Greg Madejski include University of Maryland, College Park.

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Comptonization of Infrared Radiation from Hot Dust by Relativistic Jets in Quasars

TL;DR: In this paper, the authors demonstrate the importance of near-infrared radiation from hot dust for Compton cooling of electrons/positrons in quasar jets, and show that the Comptonization of the near-IR flux is likely to dominate the radiative output of OVV quasars in the energy range from tens of keV up to hundreds of MeV.
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On Pair Content and Variability of Subparsec Jets in Quasars

TL;DR: In this paper, it was shown that jets that are initially proton-electron ("protojets") can be pair-loaded via interaction with 100-300 keV photons produced in hot accretion disc coronae, likely to exist in active galactic nuclei in general.
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Learning about Active Galactic Nucleus Jets from Spectral Properties of Blazars

TL;DR: In this article, a comparison of the predicted bulk Compton radiation with the observed soft X-ray fluxes was made and it was shown that these jets must be optically very thin, which eliminates the importance of such processes as Coulomb interactions, pair annihilation, and bremsstrahlung and determines the minimum distance from the black hole where a powerful jet can be fully developed.
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ASCA Observations of Blazars and Multiband Analysis

TL;DR: In this paper, the authors present data for 18 blazars observed with the X-ray satellite ASCA, half of which were also observed contemporaneously with the EGRET instrument onboard Compton Gamma Ray Observatory as part of multi-wavelength campaigns.
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HIGH-ENERGY EMISSION FROM THE TeV BLAZAR MARKARIAN 501 DURING MULTIWAVELENGTH OBSERVATIONS IN 1996

TL;DR: The results of a multi-wavelength campaign for Mrk 501 performed in 1996 March with ASCA, EGRET, Whipple, and optical telescopes were reported in this article. But the results of this campaign were not used for the detection of high-energy c-ray blazars.