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Arganda, E. and Arqueros Martínez, Fernando and Blanco Ramos, Francisco and García Pinto, Diego and Ortiz Ramis, Montserrat and Rosado Vélez, Jaime and Vázquez Peñas, José Ramón (2011) The effect of the geomagnetic field on cosmic ray energy estimates and large scale anisotropy searches on data from the Pierre Auger Observatory. Journal of cosmology and astroparticle physics (11). ISSN 1475-7516
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Official URL: http://dx.doi.org/10.1088/1475-7516/2011/11/022
Abstract
We present a comprehensive study of the influence of the geomagnetic field on the energy estimation of extensive air showers with a zenith angle smaller than 60 degrees, detected at the Pierre Auger Observatory. the geomagnetic field induces an azimuthal modulation of the estimated energy of cosmic rays up to the similar to 2% level at large zenith angles. We present a method to account for this modulation of the reconstructed energy. We analyse the effect of the modulation on large scale anisotropy searches in the arrival direction distributions of cosmic rays. At a given energy, the geomagnetic effect is shown to induce a pseudo-dipolar pattern at the percent level in the declination distribution that needs to be accounted for.
Item Type: | Article |
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Additional Information: | © 2011 IOP Publishing Ltd and SISSA. |
Uncontrolled Keywords: | Extensive air showers; Array; Model. |
Subjects: | Sciences > Physics > Nuclear physics |
ID Code: | 38349 |
Deposited On: | 08 Jul 2016 16:47 |
Last Modified: | 10 Dec 2018 14:58 |
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