0436668 - FZÚ 2015 RIV US eng J - Journal Article
Aab, A. - Abreu, P. - Aglietta, M. - Boháčová, Martina - Chudoba, Jiří - Ebr, Jan - Mandát, Dušan - Nečesal, Petr - Palatka, Miroslav - Pech, Miroslav - Prouza, Michael - Řídký, Jan - Schovánek, Petr - Trávníček, Petr - Vícha, Jakub … Total 607 authors
Searches for large-scale anisotropy in the arrival directions of cosmic rays detected above energy of 10¹⁹ eV at the Pierre Auger Observatory and the telescope Array.
Astrophysical Journal. Roč. 794, č. 2 (2014), s. 1-15. ISSN 0004-637X. E-ISSN 1538-4357
R&D Projects: GA ČR(CZ) GA14-17501S; GA MŠMT(CZ) 7AMB14AR005; GA MŠMT(CZ) LG13007
Institutional support: RVO:68378271
Keywords : astroparticle physics * cosmic rays
Subject RIV: BF - Elementary Particles and High Energy Physics
Impact factor: 5.993, year: 2014
http://iopscience.iop.org/0004-637X/794/2/172/pdf/0004-637X_794_2_172.pdf

Spherical harmonic moments are well-suited for capturing anisotropy at any scale in the flux of cosmic rays. An unambiguous measurement of the full set of spherical harmonic coefficients requires full-sky coverage. This can be achieved by combining data from observatories located in both the northern and southern hemispheres. To this end, a joint analysis using data recorded at the Telescope Array and the Pierre Auger Observatory above 10(19) eV is presented in this work. The resulting multipolar expansion of the flux of cosmic rays allows us to perform a series of anisotropy searches, and in particular to report on the angular power spectrum of cosmic rays above 10(19) eV. No significant deviation from isotropic expectations is found throughout the analyses performed. Upper limits on the amplitudes of the dipole and quadrupole moments are derived as a function of the direction in the sky, varying between 7% and 13% for the dipole and between 7% and 10% for a symmetric quadrupole.
Permanent Link: http://hdl.handle.net/11104/0240346