Variations of the TeV energy spectrum at different flux levels of Mkn 421 observed with the HEGRA system of Cherenkov telescopes

Aharonian, F.; G. Akhperjanian, A.; Beilicke, M.; Bernlöhr, K.; Börst, H.; Bojahr, H.; Bolz, O.; Coarasa, T.; L. Contreras, J.; Cortina, J.; Costamante, L.; Denninghoff, S.; Fonseca, V.; Girma, M.; Götting, N.; Heinzelmann, G.; Hermann, G.; Heusler, Andréas; Hofmann, W.; Horns, D.; Jung, I.; Kankanyan, R.; Kestel, M.; Kettler, J.; Kohnle, Antje; Konopelko, A.; Kornmeyer, H.; Kranich, D.; Krawczynski, H.; Lampeitl, H.; López, Marcos; Lorenz, E.; Lucarelli, F.; Mang, O.; Meyer, H.; Mirzoyan, R.; Milite, M.; Moralejo, A.; de Oña Wilhelmi, E.; Panter, M.; Plyasheshnikov, A.; Pühlhofer, G.; Rauterberg, Matthias; de los Reyes, R.; Rhode, W.; Ripken, J.; Rowell, Gavin; Sahakian, V.; Samorski, M.; Schilling, M.

doi:10.1051/0004-6361:20021005

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Variations of the TeV energy spectrum at different flux levels of Mkn 421 observed with the HEGRA system of Cherenkov telescopes

Shared by NobleBlocks on Sep 18, 2002 • 12:00 AM UTC

Authors:

F. Aharonian

A. G. Akhperjanian

M. Beilicke

Abstract

The nearby BL Lacertae (BL Lac) object Markarian 421 (Mkn 421) at a red shift was observed to undergo strong TeV γ-ray outbursts in the observational periods from December 1999 until May 2001. The time averaged flux level in the 1999/2000 season was 10-11 ph cm-2 s-1, whereas in the 2000/2001 season...

Subject

Physics

BL Lac object

Flux (metallurgy)

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