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| Main Authors: | , , , , , , , , , , , , , , , , , , , |
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| Format: | Preprint |
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2025
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2507.10441 |
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| _version_ | 1866913950704074752 |
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| author | Ureña, A. Gálvez Anchordoqui, L. Bianciotto, M. Biermann, P. Bister, T. Biteau, J. Caccianiga, L. Deligny, O. Deval, L. di Matteo, A. Giaccari, U. G. Golup, G. Higuchi, R. Kim, J. Kuznetsov, M. Lundquist, J. P. Mariani, F. M. Rubtsov, G. Tinyakov, P. Urban, F. |
| author_facet | Ureña, A. Gálvez Anchordoqui, L. Bianciotto, M. Biermann, P. Bister, T. Biteau, J. Caccianiga, L. Deligny, O. Deval, L. di Matteo, A. Giaccari, U. G. Golup, G. Higuchi, R. Kim, J. Kuznetsov, M. Lundquist, J. P. Mariani, F. M. Rubtsov, G. Tinyakov, P. Urban, F. |
| contents | Ground-based full-sky studies of the angular distribution of arrival directions of ultra-high-energy cosmic rays require combining data from different observatories, such as the Pierre Auger Observatory (Auger) and the Telescope Array (TA), because no single array can cover all declinations. A working group comprising members from the Auger and TA collaborations has been tasked with performing such studies for more than a decade and has found several indications of full-sky anisotropies. Here, we update the results for the large- and medium-scale anisotropy analyses using the latest data from TA, which include corrections for daily and yearly atmospheric effects in data for large-scale anisotropies and looser selection criteria in data for medium-scale anisotropies. We extend the latter one by considering two more galaxy catalogues, consisting of jetted or all AGNs. Finally we also introduce a new angular harmonic space analysis that allows us to measure both the auto-correlation and cross-correlation with all catalogues for all multipoles independently ($\ell_\text{max} = 20$ in this work) and scanning the energy threshold. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2507_10441 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | New full-sky studies of the distribution of ultra-high-energy cosmic-ray arrival directions Ureña, A. Gálvez Anchordoqui, L. Bianciotto, M. Biermann, P. Bister, T. Biteau, J. Caccianiga, L. Deligny, O. Deval, L. di Matteo, A. Giaccari, U. G. Golup, G. Higuchi, R. Kim, J. Kuznetsov, M. Lundquist, J. P. Mariani, F. M. Rubtsov, G. Tinyakov, P. Urban, F. High Energy Astrophysical Phenomena Ground-based full-sky studies of the angular distribution of arrival directions of ultra-high-energy cosmic rays require combining data from different observatories, such as the Pierre Auger Observatory (Auger) and the Telescope Array (TA), because no single array can cover all declinations. A working group comprising members from the Auger and TA collaborations has been tasked with performing such studies for more than a decade and has found several indications of full-sky anisotropies. Here, we update the results for the large- and medium-scale anisotropy analyses using the latest data from TA, which include corrections for daily and yearly atmospheric effects in data for large-scale anisotropies and looser selection criteria in data for medium-scale anisotropies. We extend the latter one by considering two more galaxy catalogues, consisting of jetted or all AGNs. Finally we also introduce a new angular harmonic space analysis that allows us to measure both the auto-correlation and cross-correlation with all catalogues for all multipoles independently ($\ell_\text{max} = 20$ in this work) and scanning the energy threshold. |
| title | New full-sky studies of the distribution of ultra-high-energy cosmic-ray arrival directions |
| topic | High Energy Astrophysical Phenomena |
| url | https://arxiv.org/abs/2507.10441 |