A Study on anisotropy of cosmic ray distribution with a small array of water-cherenkov detectors

Details A Study on anisotropy of cosmic ray distribution with a small array of water-cherenkov detectors A Study on anisotropy of cosmic ray distribution with a small array of water-cherenkov detectors

2007-05-29

arxiv.org/abs/0705.4234v1

Phys.Rev.D76:082002,2007

Astronomy and Astrophysics

Astrophysics

16 pages 9 figs and one table

Scientific paper

10.1103/PhysRevD.76.082002

The study of the anisotropy of the arrival directions is an essential tool to investigate the origin and propagation of cosmic rays primaries. A simple way of recording many cosmic rays is to record coincidences between a number of detectors. We have monitored multi-TeV cosmic rays by a small array of water cherenkov detectors in Tehran(35 43 N, 51 20 E, 1200m a.s.l). More than 1.1*10^6 extensive air shower events were recorded. In addition to the Compton- Getting effect due to the motion of the earth in the Galaxy, an anisotropy has been observed which is due to a unidirectional anisotropy of cosmic ray flow along the Galactic arms.

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