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Observation of TeV gamma rays from the Crab nebula using the atmospheric Cerenkov imaging technique
Abstract
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 percent of the background is rejected; a detection is reported at the 9.0-sigma level, corresponding to a flux of 1.8 x 10 to the -11th photons sq cm/s above 0.7 TeV (with a factor of 1.5 uncertainty in both flux and energy). Less than 25 percent of the observed flux is pulsed at the period of PSR 0531. There is no evidence for variability on time scales from months to years. Although continuum emission from the pulsar cannot be ruled out, it seems more likely that the observed flux comes from the hard Compton synchrotron spectrum of the nebula.
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Cited by
Particle dark matter: evidence, candidates and constraints
Bertone, G., Hooper, D., & Silk, J. (2005) · Physics Reports · doi:10.1016/j.physrep.2004.08.031 · Cited by 4,979
Detection of TeV photons from the active galaxy Markarian 421
Punch, M., Akerlof, C. W., Cawley, M. F., Chantell, M., Fegan, D. J., Fennell, S., Gaidos, J. A., Hagan, J., Hillas, A. M., Jiang, Y., et al. (1992) · Nature · doi:10.1038/358477a0 · Cited by 772
Self-citationCosmic physics: the high energy frontier
Stecker, F. W. (2003) · Journal of Physics G: Nuclear and Particle Physics · doi:10.1088/0954-3899/29/10/201 · Cited by 48
Metadata
- Authors
- Weekes, T. C., Cawley, M. F., Fegan, D. J., Gibbs, K. G., Hillas, A. M., Kowk, P. W., Lamb, R. C., Lewis, D. A., Macomb, D., Porter, N. A., Reynolds, P. T., & Vacanti, G.
- Venue
- The Astrophysical Journal
- Publisher
- American Astronomical Society
- Published
- 1989-07
- Volume
- 342
- Pages
- 379
- ISSN
- 0004-637X (ISSN-L)
- 1538-4357
- OpenAlex
- W1974281020
- Cited by
- 715
- References
- 0
- FWCI
- 10.31
- Type
- journal article
- Language
- en
- Open access
- closed
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- CoChat. (2026). Citation check: Observation of TeV gamma rays from the Crab nebula using the atmospheric Cerenkov imaging technique. https://app.cochat.ai/papers/10.1086/167599
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- Weekes, T. C., Cawley, M. F., Fegan, D. J., Gibbs, K. G., Hillas, A. M., Kowk, P. W., Lamb, R. C., Lewis, D. A., Macomb, D., Porter, N. A., Reynolds, P. T., & Vacanti, G. (1989). Observation of TeV gamma rays from the Crab nebula using the atmospheric Cerenkov imaging technique. The Astrophysical Journal. https://doi.org/10.1086/167599
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