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Multiwavelength Observations of Strong Flares From the TeV-Blazar 1ES 1959+650
H. Krawczynski, S. B. Hughes, D. Horan +16
Following the detection of strong TeV gamma-ray flares from the BL Lac object 1ES 1959+650 with the Whipple 10 m Cherenkov telescope on May 16 and 17, 2002, we performed intensive…
The Technical Performance of the HEGRA System of Imaging Air Cherenkov Telescopes
G. Puehlhofer, O. Bolz, N. Goetting +1
Between early 1997 and late 2002, the HEGRA collaboration operated a stereoscopic system of 4 (later 5) imaging atmospheric Cherenkov telescopes. In this paper we present the calib…
On the non-thermal high energy radiation of galaxy clusters
A. N. Timokhin, F. A. Aharonian, A. Yu. Neronov
The origin of the nonthermal EUV and hard X-ray emission "excess" reported from some galaxy clusters has been intensively debated over last several years. The most favored models w…
Is the Giant Radio Galaxy M87 a TeV Gamma-Ray Emitter?
HEGRA Collaboration, F. Aharonian, A. Akhperjanian +1
For the first time an excess of photons above an energy threshold of 730 GeV from the giant radio galaxy M87 has been measured at a significance level above 4 sigma. The data have…
Observations of H1426+428 with HEGRA -- Observations in 2002 and reanalysis of 1999&2000 data
HEGRA-Collaboration, F. Aharonian
The HEGRA system of imaging air Cherenkov telescopes has been used to observe the BL Lac object H1426+428 () for 217.5 hours in 2002. In this data set alone, the source is…
Particle Acceleration through Multiple Conversions from Charged into Neutral State and Back
E. V. Derishev, F. A. Aharonian, V. V. Kocharovsky +1
We propose a new way of quick and very efficient acceleration of protons and/or electrons in relativistic bulk flows. The new mechanism takes advantage of conversion of particles f…