INVESTIGADORES
HANSEN Patricia Maria
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:
THE PIERRE AUGER COLLABORATION (P HANSEN PERTENECE A LA COLABORACIÓN AUGER)
Revista:
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
Editorial:
IOP PUBLISHING LTD
Referencias:
Lugar: Londres; Año: 2011 p. 1 - 21
ISSN:
1475-7516
Resumen:
We present a comprehensive study of the influence of the geomagnetic field onthe energy estimation of extensive air showers with a zenith angle smaller than 60, detectedat the Pierre Auger Observatory. The geomagnetic field induces an azimuthal modulation ofthe estimated energy of cosmic rays up to the 2% level at large zenith angles. We presenta method to account for this modulation of the reconstructed energy. We analyse the effectof the modulation on large scale anisotropy searches in the arrival direction distributions ofcosmic rays. At a given energy, the geomagnetic effect is shown to induce a pseudo-dipolarpattern at the percent level in the declination distribution that needs to be accounted for.
