INVESTIGADORES
MARIAZZI Analisa Gabriela
artículos
Título:
The effect of the geomagnetic field on cosmic ray energy estimates and large scale anisotropy searches on data from the Pierre Auger Observatory
Autor/es:
PIERRE AUGER COLLABORATION (J. ABRAHAM, ... , A. MARIAZZI, ET AL)
Revista:
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
Editorial:
IOP PUBLISHING LTD
Referencias:
Año: 2011 vol. 2011 p. 22 - 22
ISSN:
1475-7516
Resumen:
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°, detected at the Pierre Auger Observatory. The
geomagnetic field induces an azimuthal modulation of the estimated
energy of cosmic rays up to the ~ 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.