The effect of the geomagnetic field on cosmic ray energy estimates and large scale anisotropy searches on data from the Pierre Auger Observatory
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...
| Main Authors: | , , , , , , , , , , , , , , , , , , , , , , , , |
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| Format: | Journal article |
| Language: | English |
| Published: |
2011
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| _version_ | 1826302327215095808 |
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| author | Abreu, P Aglietta, M Ahn, E Albuquerque, I Allard, D Allekotte, I Allen, J Allison, P Alvarez Castillo, J Alvarez-Muñiz, J Ambrosio, M Aminaei, A Anchordoqui, L Andringa, S Antičić, T Anzalone, A Aramo, C Arganda, E Arqueros, F Asorey, H Assis, P Aublin, J Ave, M Avenier, M Avila, G |
| author_facet | Abreu, P Aglietta, M Ahn, E Albuquerque, I Allard, D Allekotte, I Allen, J Allison, P Alvarez Castillo, J Alvarez-Muñiz, J Ambrosio, M Aminaei, A Anchordoqui, L Andringa, S Antičić, T Anzalone, A Aramo, C Arganda, E Arqueros, F Asorey, H Assis, P Aublin, J Ave, M Avenier, M Avila, G |
| author_sort | Abreu, P |
| collection | OXFORD |
| description | 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. © 2011 IOP Publishing Ltd and SISSA. |
| first_indexed | 2024-03-07T05:45:52Z |
| format | Journal article |
| id | oxford-uuid:e73190b0-473f-44da-985a-3c649d42ec55 |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-07T05:45:52Z |
| publishDate | 2011 |
| record_format | dspace |
| spelling | oxford-uuid:e73190b0-473f-44da-985a-3c649d42ec552022-03-27T10:36:48ZThe effect of the geomagnetic field on cosmic ray energy estimates and large scale anisotropy searches on data from the Pierre Auger ObservatoryJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:e73190b0-473f-44da-985a-3c649d42ec55EnglishSymplectic Elements at Oxford2011Abreu, PAglietta, MAhn, EAlbuquerque, IAllard, DAllekotte, IAllen, JAllison, PAlvarez Castillo, JAlvarez-Muñiz, JAmbrosio, MAminaei, AAnchordoqui, LAndringa, SAntičić, TAnzalone, AAramo, CArganda, EArqueros, FAsorey, HAssis, PAublin, JAve, MAvenier, MAvila, GWe 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. © 2011 IOP Publishing Ltd and SISSA. |
| spellingShingle | Abreu, P Aglietta, M Ahn, E Albuquerque, I Allard, D Allekotte, I Allen, J Allison, P Alvarez Castillo, J Alvarez-Muñiz, J Ambrosio, M Aminaei, A Anchordoqui, L Andringa, S Antičić, T Anzalone, A Aramo, C Arganda, E Arqueros, F Asorey, H Assis, P Aublin, J Ave, M Avenier, M Avila, G The effect of the geomagnetic field on cosmic ray energy estimates and large scale anisotropy searches on data from the Pierre Auger Observatory |
| title | The effect of the geomagnetic field on cosmic ray energy estimates and large scale anisotropy searches on data from the Pierre Auger Observatory |
| title_full | The effect of the geomagnetic field on cosmic ray energy estimates and large scale anisotropy searches on data from the Pierre Auger Observatory |
| title_fullStr | The effect of the geomagnetic field on cosmic ray energy estimates and large scale anisotropy searches on data from the Pierre Auger Observatory |
| title_full_unstemmed | The effect of the geomagnetic field on cosmic ray energy estimates and large scale anisotropy searches on data from the Pierre Auger Observatory |
| title_short | The effect of the geomagnetic field on cosmic ray energy estimates and large scale anisotropy searches on data from the Pierre Auger Observatory |
| title_sort | effect of the geomagnetic field on cosmic ray energy estimates and large scale anisotropy searches on data from the pierre auger observatory |
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