The influence of the observatory latitude on the study of ultra high energy cosmic rays

Autor(es)

dos Anjos, Rita C. ; de Souza, Vitor ; de Almeida, Rogerio M. ; Santos, Edivaldo M.

• Tipo de documento: Artigo Científico
• Fonte: Journal of Cosmology and Astroparticle Physics; v. N/A, n. 7, p. 12-pg., 2017-07-01.

Resumo

Recent precision measurements of the Ultra High Energy Cosmic Rays (UHECR) arrival directions, spectrum and parameters related to the mass of the primary particle have been done by the HiRes, Pierre Auger and Telescope Array (TA) Observatories. In this paper, distributions of arrival directions of events in the nearby Universe are assumed to correlate with sources in the 2MASS Redshift Survey (2MRS), IRAS 1.2 Jy Survey, Palermo Swift-BAT and Swift-BAT catalogs, and the effect of the latitude of the observatory on the measurement of the energy spectrum and on the capability of measuring anisotropy is studied. The differences between given latitudes on the northern and southern hemispheres are quantified. It is shown that the latitude of the observatory: a) has an influence on the total flux measured and b) imposes an important limitation on the capability of measuring an anisotropic sky. (AU)

• Processo FAPESP: 10/07359-6 - Estudo dos raios cósmicos de mais altas energias com o Observatório Pierre Auger
• Beneficiário: Carola Dobrigkeit Chinellato
• Modalidade de apoio: Auxílio à Pesquisa - Temático
• Processo FAPESP: 14/19946-4 - Nova geração de detectores de múons RPC para medida de raios cósmicos de altíssima energia com grande precisão
• Beneficiário: Carola Dobrigkeit Chinellato
• Modalidade de apoio: Auxílio à Pesquisa - Regular