Observation of MKN 501 at gamma-ray energies |
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| Authors: | L Bassani R C Butler A J Dean G Di Cocco A Della Ventura F Perotti G Villa |
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| Institution: | (1) Department of Physics, University of Southampton, England;(2) Present address: Istituto TESRE, CNR, Via De'Castagnoli, 1, Bologna, Italy;(3) Istituto di Fisica Cosmica, CNR, Milano, Italy |
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| Abstract: | During a balloon flight in September 1979 of the MISO low-energy  -ray telescope, the BL Lac-object MkN 501 was studied in the hard X-ray range above 30 keV and in the low energy -ray range up to 19 MeV. No statistically significant X- and -ray fluxes were detected. The implications of the upper limits obtained are discussed in the light of the relativistic jet theories recently proposed. |
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