Astronomy and Astrophysics – Astrophysics
Scientific paper
1997-06-03
Astronomy and Astrophysics
Astrophysics
4 pages, latex, 2 figures
Scientific paper
In the absence of a standard source of gamma rays or hadrons of known energy one has to study the details of production of \v Cerenkov light at the observation level only through detailed simulation studies. Recently such studies have become all the more important in view of the various techniques resulting from such studies, to distinguish between gamma ray initiated events from those generated by much more abundant hadronic component of cosmic rays. We have carried out a detailed simulation studies using the CORSIKA package in order to study the Cerenkov photon density fluctuations at various core distances both for photon and proton primaries incident vertically at the top of the atmosphere. It is found that the density fluctuations are significantly non-statistical. Such fluctuations are much more pronounced in the case of proton primaries as compared to photon primaries at all energies. Several statistical parameters have been computed some which might lead to a technique in distinguishing photon primaries.
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