Spectrum of TeV Gamma-Rays from the Crab Nebula

Details Spectrum of TeV Gamma-Rays from the Crab Nebula Spectrum of TeV Gamma-Rays from the Crab Nebula

1997-06-15

arxiv.org/abs/astro-ph/9706145v1

Astronomy and Astrophysics

Astrophysics

4 pages, 3 figures, to appear in proceedings of the 25th ICRC (Durban)

Scientific paper

The Crab Nebula has become established as the standard candle for TeV gamma-ray astronomy using the atmospheric Cherenkov technique. No evidence for variability has been seen. The spectrum of gamma rays from the Crab Nebula has been measured in the energy range 500 GeV to 8 TeV at the Whipple Observatory by the atmospheric Cherenkov imaging technique. Two methods of analysis involving independent Monte Carlo simulations and two databases of observations (1988-89 and 1995-96) were used and gave close agreement. Using the complete spectrum of the Crab Nebula, the spectrum of relativistic electrons is deduced and the spectrum of the resulting inverse Compton gamma-ray emission is in good agreement with the measured spectrum if the ambient magnetic field is about 25-30 nT.

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