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Upper limit on the cosmic-ray photon flux above 10^19 eV using the surface detector of the Pierre Auger Observatory

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Upper limit on the cosmic-ray photon flux above 10^19 eV using the surface detector of the Pierre Auger Observatory

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dc.contributor.author The Pierre Auger Collaboration
dc.contributor.author Pastor Carpi, Sergio
dc.contributor.author Pinto, Teguayco
dc.date.accessioned 2015-10-27T08:43:41Z
dc.date.available 2015-10-27T08:43:41Z
dc.date.issued 2008
dc.identifier.citation The Pierre Auger Collaboration Pastor Carpi, Sergio Pinto, Teguayco 2008 Upper limit on the cosmic-ray photon flux above 10^19 eV using the surface detector of the Pierre Auger Observatory Astroparticle Physics 29 4 243 256
dc.identifier.uri http://hdl.handle.net/10550/47916
dc.description.abstract A method is developed to search for air showers initiated by photons using data recorded by the surface detector of the Auger Observatory. The approach is based on observables sensitive to the longitudinal shower development, the signal risetime and the curvature of the shower front. Applying this method to the data, upper limits on the flux of photons of 3.8*10^-3, 2.5*10^-3, and 2.2*10^-3 km^-2 sr^-1 yr^-1 above 10^19 eV, 2*10^19 eV, and 4*10^19 eV are derived, with corresponding limits on the fraction of photons being 2.0%, 5.1%, and 31% (all limits at 95% c.l.). These photon limits disfavor certain exotic models of sources of cosmic rays. The results also show that the approach adopted by the Auger Observatory to calibrate the shower energy is not strongly biased by a contamination from photons.
dc.language.iso eng
dc.relation.ispartof Astroparticle Physics, 2008, vol. 29, num. 4, p. 243-256
dc.subject Física
dc.title Upper limit on the cosmic-ray photon flux above 10^19 eV using the surface detector of the Pierre Auger Observatory
dc.type journal article es_ES
dc.date.updated 2015-10-27T08:43:41Z
dc.identifier.doi 10.1016/j.astropartphys.2008.01.003
dc.identifier.idgrec 047919
dc.rights.accessRights open access es_ES

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