Tev Observations of the Variability and Spectrum of Markarian 421



McEnery, JE, Bond, IH, Boyle, PJ, Bradbury, SM, Breslin, AC, Buckley, JH, Burdett, AM, Gordo, J Bussons, Carter-Lewis, DA, Catanese, M
et al (show 20 more authors) Tev Observations of the Variability and Spectrum of Markarian 421.

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Abstract

Markarian 421 was the first extragalactic source to be detected with high statistical certainty at TeV energies. The Whipple Observatory gamma-ray telescope has been used to observe the Active Galactic Nucleus, Markarian 421 in 1996 and 1997. The rapid variability observed in TeV gamma rays in previous years is confirmed. Doubling times as short as 15 minutes are reported with flux levels reaching 15 photons per minute. The TeV energy spectrum is derived using two independent methods. The implications for the intergalactic infra-red medium of an observed unbroken power law spectrum up to energies of 5 TeV is discussed.

Item Type: Article
Additional Information: 4 pages, 4 figures, to appear in proceedings of 25 ICRC (Durban)
Uncontrolled Keywords: astro-ph, astro-ph
Depositing User: Symplectic Admin
Date Deposited: 27 Jul 2018 14:00
Last Modified: 04 Jul 2019 07:10
Related URLs:
URI: http://livrepository.liverpool.ac.uk/id/eprint/3024221
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