Sensitivity of the combined fit of energy spectrum, shower depth distributions, and arrival directions at the Pierre Auger Observatory
The Pierre Auger Observatory measures several characteristics of ultra-high-energy cosmic rays (UHECRs), most importantly the energy spectrum, the distribution of maximum shower depths and the arrival directions. We use all three observables for a combined fit, in which parameters of possible UHECR...
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| Format: | Article |
| Language: | English |
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EDP Sciences
2023-01-01
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| Series: | EPJ Web of Conferences |
| Online Access: | https://www.epj-conferences.org/articles/epjconf/pdf/2023/09/epjconf_uhecr2023_03008.pdf |
| _version_ | 1797807749106499584 |
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| author | Bister Teresa |
| author_facet | Bister Teresa |
| author_sort | Bister Teresa |
| collection | DOAJ |
| description | The Pierre Auger Observatory measures several characteristics of ultra-high-energy cosmic rays (UHECRs), most importantly the energy spectrum, the distribution of maximum shower depths and the arrival directions. We use all three observables for a combined fit, in which parameters of possible UHECR sources can be constrained. The astrophy sical model used in the fit consists of homogeneo usly distributed background sources as well as an adaptable contribution from a nearby source population . For this, the catalogs of starburst galaxies and active galactic nuclei are used which show an indication for a correlation with the UHECR arrival directions . The signal fraction, as well as the size of a rigidity-dependent magn etic field blurring, are part of the fit parameters, along with the parameters describing the source emission. Tn this work, we present an astro-physical simulation containing an energy-dependent contribution from starburst galaxies, which simultaneously describes the energy spectrum, shower depth distributions, and arrival directions measured by the Pierre Auger Observatory. On this simulation, the discrimination power of the method regarding the differentiation of source catalogs is demonstrated, and the expected statistical significance of the result is investigated. |
| first_indexed | 2024-03-13T06:27:17Z |
| format | Article |
| id | doaj.art-daab0dd373044d01bfdcd45c22cbafec |
| institution | Directory Open Access Journal |
| issn | 2100-014X |
| language | English |
| last_indexed | 2024-03-13T06:27:17Z |
| publishDate | 2023-01-01 |
| publisher | EDP Sciences |
| record_format | Article |
| series | EPJ Web of Conferences |
| spelling | doaj.art-daab0dd373044d01bfdcd45c22cbafec2023-06-09T09:15:58ZengEDP SciencesEPJ Web of Conferences2100-014X2023-01-012830300810.1051/epjconf/202328303008epjconf_uhecr2023_03008Sensitivity of the combined fit of energy spectrum, shower depth distributions, and arrival directions at the Pierre Auger ObservatoryBister Teresa0Institute for Mathematics, Astrophysics and Particle Physics (IMAPP), Radboud UniversiteitThe Pierre Auger Observatory measures several characteristics of ultra-high-energy cosmic rays (UHECRs), most importantly the energy spectrum, the distribution of maximum shower depths and the arrival directions. We use all three observables for a combined fit, in which parameters of possible UHECR sources can be constrained. The astrophy sical model used in the fit consists of homogeneo usly distributed background sources as well as an adaptable contribution from a nearby source population . For this, the catalogs of starburst galaxies and active galactic nuclei are used which show an indication for a correlation with the UHECR arrival directions . The signal fraction, as well as the size of a rigidity-dependent magn etic field blurring, are part of the fit parameters, along with the parameters describing the source emission. Tn this work, we present an astro-physical simulation containing an energy-dependent contribution from starburst galaxies, which simultaneously describes the energy spectrum, shower depth distributions, and arrival directions measured by the Pierre Auger Observatory. On this simulation, the discrimination power of the method regarding the differentiation of source catalogs is demonstrated, and the expected statistical significance of the result is investigated.https://www.epj-conferences.org/articles/epjconf/pdf/2023/09/epjconf_uhecr2023_03008.pdf |
| spellingShingle | Bister Teresa Sensitivity of the combined fit of energy spectrum, shower depth distributions, and arrival directions at the Pierre Auger Observatory EPJ Web of Conferences |
| title | Sensitivity of the combined fit of energy spectrum, shower depth distributions, and arrival directions at the Pierre Auger Observatory |
| title_full | Sensitivity of the combined fit of energy spectrum, shower depth distributions, and arrival directions at the Pierre Auger Observatory |
| title_fullStr | Sensitivity of the combined fit of energy spectrum, shower depth distributions, and arrival directions at the Pierre Auger Observatory |
| title_full_unstemmed | Sensitivity of the combined fit of energy spectrum, shower depth distributions, and arrival directions at the Pierre Auger Observatory |
| title_short | Sensitivity of the combined fit of energy spectrum, shower depth distributions, and arrival directions at the Pierre Auger Observatory |
| title_sort | sensitivity of the combined fit of energy spectrum shower depth distributions and arrival directions at the pierre auger observatory |
| url | https://www.epj-conferences.org/articles/epjconf/pdf/2023/09/epjconf_uhecr2023_03008.pdf |
| work_keys_str_mv | AT bisterteresa sensitivityofthecombinedfitofenergyspectrumshowerdepthdistributionsandarrivaldirectionsatthepierreaugerobservatory |