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Observation of TeV Gamma Rays from the Crab Nebula with Milagro Using a New Background Rejection Technique

R. Atkins, W. Benbow, D. Berley, E. Blaufuss, J. Bussons, D. G. Coyne, R. S. Delay, T. DeYoung, B. L. Dingus, D. E. Dorfan, R. W. Ellsworth, A. Falcone (+33 others)
2003 Astrophysical Journal  

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2003 pre-print
arXiv:astro-ph/0305308v1 fatcat:scxx2y7omvctnjygt347plreta
The recent advances in TeV gamma-ray astronomy are largely the result of the ability to differentiate between extensive air showers generated by gamma rays and hadronic cosmic rays. Air Cherenkov telescopes have developed and perfected the "imaging" technique over the past several decades. However until now no background rejection method has been successfully used in an air shower array to detect a source of TeV gamma rays. We report on a method to differentiate hadronic air showers from
more » ... magnetic air showers in the Milagro gamma ray observatory, based on the ability to detect the energetic particles in an extensive air shower. The technique is used to detect TeV emission from the Crab nebula. The flux from the Crab is estimated to be 2.68(+-0.42stat +- 1.4sys) x10^-7 (E/1TeV)^-2.59 m^-2 s^-1 TeV^-1, where the spectral index is assumed to be as given by the HEGRA collaboration.
doi:10.1086/377498 fatcat:dtt2gqxtzvbk3cv5agca7vmg4m
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Citation

R. Atkins, W. Benbow, D. Berley, E. Blaufuss, J. Bussons, D. G. Coyne, R. S. Delay, T. DeYoung, B. L. Dingus, D. E. Dorfan, R. W. Ellsworth, A. Falcone, L. Fleysher, R. Fleysher, G. Gisler, M. M. Gonzalez, J. A. Goodman, T. J. Haines, E. Hays, C. M. Hoffman, L. A. Kelley, R. W. Laird, J. McCullough, J. E. McEnery, R. S. Miller, A. I. Mincer, M. F. Morales, P. Nemethy, D. Noyes, J. M. Ryan, F. W. Samuelson, M. Schneider, B. Shen, A. Shoup, G. Sinnis, A. J. Smith, G. W. Sullivan, O. T. Tumer, K. Wang, M. Wascko, D. A. Williams, S. Westerhoff, M. E. Wilson, X. Xu, G. B. Yodh. "Observation of TeV Gamma Rays from the Crab Nebula with Milagro Using a New Background Rejection Technique." Astrophysical Journal 595.2 (2003) 803-811