Very high energy γ-radiation from the radio quasar 4C 21.35
Copyright policy )Very high energy γ-radiation from the radio quasar 4C 21.35
AbstractA very high energy (VHE) γ-radiation was detected from a flat spectrum radio quasar (FSRQ) 4C 21.35 (PKS1222+21) by MAGIC (Major Atmospheric Gamma Imaging Cherenkov) telescopes on June 17th 2010. 4C 21.35 is only the 3rd FSRQ detected in VHE γ-rays. With its hard spectrum (Γ = 2.72±0.34) with no apparent cut-off at energies below 130 GeV and an extremely fast variation of flux (doubling in 8.6+1.1−0.9 minutes), this detection poses a challenge to existing models of VHE γ-radiation from FSRQs. The most important results of observations performed by MAGIC telescopes are presented here, as well as some possible explanations of those results.
- National Institute for Nuclear Physics Italy
- University of Łódź Poland
- University of Rijeka, Faculty of Physics Croatia
- University of Padua Italy
- University of La Laguna Spain
NEANIAS Atmospheric Research Community, NEANIAS Space Research Community, Space and Planetary Science, Astronomy and Astrophysics, Energy Research
NEANIAS Atmospheric Research Community, NEANIAS Space Research Community, Space and Planetary Science, Astronomy and Astrophysics, Energy Research