Recent Observations of gamma-rays above 1.5 TeV from Mkn 501 with the HEGRA 5 m^2 Air Cherenkov Telescope
arXiv, 1997
Online
unknown
Zugriff:
Since February 1997 the BL Lac object Mkn 501 is in a ``high state'' of gamma-ray emission. The HEGRA collaboration has studied Mkn 501 with their air Cherenkov telescopes on La Palma. Here we report on observations with the 5 m^2 telescope (threshold approx. 1.5 TeV) operated in a stand alone mode. We observed a rapidly varying flux between 0.5 to 6 times of that from the Crab Nebula. On average an integral flux above 1.5 TeV of (2 + 1.3 - 0.5) x 10^-11 cm^-2 s^-1 has been determined. The spectrum extends at least up to 10 TeV with an integral power law coefficient of 1.8 +- 0.2 and seems to be steeper than in 1996.
Comment: 5 pages, to be published in the Proceedings of the 4th Compton Symposium, Williamsburg, Virginia, April 1997
Titel: |
Recent Observations of gamma-rays above 1.5 TeV from Mkn 501 with the HEGRA 5 m^2 Air Cherenkov Telescope
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Autor/in / Beteiligte Person: | Kranich, D. ; Deckers, T. ; Lorenz, E. ; Petry, D. ; Rauterberg, G. ; Collaboration, the HEGRA |
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Veröffentlichung: | arXiv, 1997 |
Medientyp: | unknown |
DOI: | 10.48550/arxiv.astro-ph/9707293 |
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