Details

Autor(en) / Beteiligte

• González, Josefa Becerra
• Maraschi, Laura
• Mazin, Daniel
• Prandini, Elisa
• Saito, Koji
• Sitarek, Julian
• Stamerra, Antonio
• Tavecchio, Fabrizio
• Terzić, Tomislav
• Treves, Aldo

Titel

Very high energy γ-radiation from the radio quasar 4C 21.35

Ist Teil von

• Proceedings of the International Astronomical Union, 2011-09, Vol.7 (S284), p.414-416

Ort / Verlag

Cambridge, UK: Cambridge University Press

Erscheinungsjahr

2011

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• A 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.