Astronomy and Astrophysics – Astrophysics
Scientific paper
1999-03-23
JETP Lett. 69 (1999) 288-293
Astronomy and Astrophysics
Astrophysics
4 pages, 3 figures in ps files
Scientific paper
10.1134/1.568025
The Earth's magnetic field effect on the azimuthal distribution of extensive air showers (EAS) of cosmic rays has been evaluated using a bulk of the Yakutsk array data. The uniform azimuthal distribution of the EAS event rate is rejected at the significance level 10^(-14). Amplitude of the first harmonics of observed distribution depends on zenith angle as A1=0.2*sin^2(theta) and is almost independent of the primary energy; the phase coincides with the magnetic meridian. Basing upon the value of measured effect, the correction factor has been derived for the particle density depending on a geomagnetic parameter of a shower.
Egorova V. P.
Ivanov Anatoly A.
Kolosov V. A.
Krasilnikov A. D.
Pravdin M. I.
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