A search for point sources of EeV photons
- Autores
- Dova, María Teresa; Gómez Albarracín, Flavia Alejandra; Hansen, Patricia María; Jarne, Cecilia Gisele; Mariazzi, Analisa Gabriela; Moreno, Juan Cruz; Sciutto, Sergio Juan; Wahlberg, Hernán Pablo; The Pierre Auger Collaboration
- Año de publicación
- 2014
- Idioma
- inglés
- Tipo de recurso
- artículo
- Estado
- versión publicada
- Descripción
- Measurements of air showersmade using the hybrid technique developed with the fluorescence and surface detectors of the Pierre Auger Observatory allow a sensitive search for point sources of EeV photons anywhere in the exposed sky. A multivariate analysis reduces the background of hadronic cosmic rays. The search is sensitive to a declination band from −85º to +20º, in an energy range from 1017.3 eV to 1018.5 eV. No photon point source has been detected. An upper limit on the photon flux has been derived for every direction. The mean value of the energy flux limit that results from this, assuming a photon spectral index of −2, is 0.06 eV cm−2 s−1, and no celestial direction exceeds 0.25 eV cm−2 s−1. These upper limits constrain scenarios in which EeV cosmic ray protons are emitted by non-transient sources in the Galaxy.
Facultad de Ciencias Exactas - Materia
-
Ciencias Exactas
Física
Astroparticle physics
Radiación cósmica - Nivel de accesibilidad
- acceso abierto
- Condiciones de uso
- http://creativecommons.org/licenses/by-nc-sa/4.0/
- Repositorio
.jpg)
- Institución
- Universidad Nacional de La Plata
- OAI Identificador
- oai:sedici.unlp.edu.ar:10915/81382
Ver los metadatos del registro completo
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A search for point sources of EeV photonsDova, María TeresaGómez Albarracín, Flavia AlejandraHansen, Patricia MaríaJarne, Cecilia GiseleMariazzi, Analisa GabrielaMoreno, Juan CruzSciutto, Sergio JuanWahlberg, Hernán PabloThe Pierre Auger CollaborationCiencias ExactasFísicaAstroparticle physicsRadiación cósmicaMeasurements of air showersmade using the hybrid technique developed with the fluorescence and surface detectors of the Pierre Auger Observatory allow a sensitive search for point sources of EeV photons anywhere in the exposed sky. A multivariate analysis reduces the background of hadronic cosmic rays. The search is sensitive to a declination band from −85º to +20º, in an energy range from 10<sup>17.3</sup> eV to 10<sup>18.5</sup> eV. No photon point source has been detected. An upper limit on the photon flux has been derived for every direction. The mean value of the energy flux limit that results from this, assuming a photon spectral index of −2, is 0.06 eV cm<sup>−2</sup> s<sup>−1</sup>, and no celestial direction exceeds 0.25 eV cm<sup>−2</sup> s<sup>−1</sup>. These upper limits constrain scenarios in which EeV cosmic ray protons are emitted by non-transient sources in the Galaxy.Facultad de Ciencias Exactas2014-07-10info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionArticulohttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfhttp://sedici.unlp.edu.ar/handle/10915/81382enginfo:eu-repo/semantics/altIdentifier/issn/0004-637Xinfo:eu-repo/semantics/altIdentifier/doi/10.1088/0004-637X/789/2/160info:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by-nc-sa/4.0/Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)reponame:SEDICI (UNLP)instname:Universidad Nacional de La Platainstacron:UNLP2025-09-29T11:15:07Zoai:sedici.unlp.edu.ar:10915/81382Institucionalhttp://sedici.unlp.edu.ar/Universidad públicaNo correspondehttp://sedici.unlp.edu.ar/oai/snrdalira@sedici.unlp.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:13292025-09-29 11:15:07.644SEDICI (UNLP) - Universidad Nacional de La Platafalse |
| dc.title.none.fl_str_mv |
A search for point sources of EeV photons |
| title |
A search for point sources of EeV photons |
| spellingShingle |
A search for point sources of EeV photons Dova, María Teresa Ciencias Exactas Física Astroparticle physics Radiación cósmica |
| title_short |
A search for point sources of EeV photons |
| title_full |
A search for point sources of EeV photons |
| title_fullStr |
A search for point sources of EeV photons |
| title_full_unstemmed |
A search for point sources of EeV photons |
| title_sort |
A search for point sources of EeV photons |
| dc.creator.none.fl_str_mv |
Dova, María Teresa Gómez Albarracín, Flavia Alejandra Hansen, Patricia María Jarne, Cecilia Gisele Mariazzi, Analisa Gabriela Moreno, Juan Cruz Sciutto, Sergio Juan Wahlberg, Hernán Pablo The Pierre Auger Collaboration |
| author |
Dova, María Teresa |
| author_facet |
Dova, María Teresa Gómez Albarracín, Flavia Alejandra Hansen, Patricia María Jarne, Cecilia Gisele Mariazzi, Analisa Gabriela Moreno, Juan Cruz Sciutto, Sergio Juan Wahlberg, Hernán Pablo The Pierre Auger Collaboration |
| author_role |
author |
| author2 |
Gómez Albarracín, Flavia Alejandra Hansen, Patricia María Jarne, Cecilia Gisele Mariazzi, Analisa Gabriela Moreno, Juan Cruz Sciutto, Sergio Juan Wahlberg, Hernán Pablo The Pierre Auger Collaboration |
| author2_role |
author author author author author author author author |
| dc.subject.none.fl_str_mv |
Ciencias Exactas Física Astroparticle physics Radiación cósmica |
| topic |
Ciencias Exactas Física Astroparticle physics Radiación cósmica |
| dc.description.none.fl_txt_mv |
Measurements of air showersmade using the hybrid technique developed with the fluorescence and surface detectors of the Pierre Auger Observatory allow a sensitive search for point sources of EeV photons anywhere in the exposed sky. A multivariate analysis reduces the background of hadronic cosmic rays. The search is sensitive to a declination band from −85º to +20º, in an energy range from 10<sup>17.3</sup> eV to 10<sup>18.5</sup> eV. No photon point source has been detected. An upper limit on the photon flux has been derived for every direction. The mean value of the energy flux limit that results from this, assuming a photon spectral index of −2, is 0.06 eV cm<sup>−2</sup> s<sup>−1</sup>, and no celestial direction exceeds 0.25 eV cm<sup>−2</sup> s<sup>−1</sup>. These upper limits constrain scenarios in which EeV cosmic ray protons are emitted by non-transient sources in the Galaxy. Facultad de Ciencias Exactas |
| description |
Measurements of air showersmade using the hybrid technique developed with the fluorescence and surface detectors of the Pierre Auger Observatory allow a sensitive search for point sources of EeV photons anywhere in the exposed sky. A multivariate analysis reduces the background of hadronic cosmic rays. The search is sensitive to a declination band from −85º to +20º, in an energy range from 10<sup>17.3</sup> eV to 10<sup>18.5</sup> eV. No photon point source has been detected. An upper limit on the photon flux has been derived for every direction. The mean value of the energy flux limit that results from this, assuming a photon spectral index of −2, is 0.06 eV cm<sup>−2</sup> s<sup>−1</sup>, and no celestial direction exceeds 0.25 eV cm<sup>−2</sup> s<sup>−1</sup>. These upper limits constrain scenarios in which EeV cosmic ray protons are emitted by non-transient sources in the Galaxy. |
| publishDate |
2014 |
| dc.date.none.fl_str_mv |
2014-07-10 |
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info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Articulo http://purl.org/coar/resource_type/c_6501 info:ar-repo/semantics/articulo |
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article |
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http://sedici.unlp.edu.ar/handle/10915/81382 |
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eng |
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eng |
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