Observation of TeV gamma rays from the Crab Nebula using the atmospheric Cerenkov imaging technique

@article{Weekes1989ObservationOT,
  title={Observation of TeV gamma rays from the Crab Nebula using the atmospheric Cerenkov imaging technique},
  author={Trevor C. Weekes and Michael F. Cawley and David J. Fegan and Kenneth Gerard Gibbs and A. M. Hillas and P. W. Kowk and Richard C. Lamb and Debra Lewis and Daryl Jack Macomb and N. A. Porter and Philip T. Reynolds and Giuseppe Vacanti},
  journal={The Astrophysical Journal},
  year={1989},
  volume={342},
  pages={379-395}
}
The Whipple Observatory 10 m reflector, operating as a 37 pixel camera, has been used to observe the Crab Nebula in TeV gamma rays. By selecting gamma-ray images based on their predicted properties, more than 98% of the background is rejected; a detection is reported at the 9.0 a level, corresponding to a flux of 1.8 x 10 11 photons cm s 1 above 0.7 TeV (with a factor of 1.5 uncertainty in both flux and energy). Less than 25% of the observed flux is pulsed at the period of PSR 0531. There is no… 
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TLDR
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