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A targeted search for point sources of EeV photons with the Pierre Auger Observatory
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arxiv 1612.04155 v2 pith:BSGE3Z62 submitted 2016-12-13 astro-ph.HE hep-ph
A targeted search for point sources of EeV photons with the Pierre Auger Observatory
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Simultaneous measurements of air showers with the fluorescence and surface detectors of the Pierre Auger Observatory allow a sensitive search for EeV photon point sources. Several Galactic and extragalactic candidate objects are grouped in classes to reduce the statistical penalty of many trials from that of a blind search and are analyzed for a significant excess above the background expectation. The presented search does not find any evidence for photon emission at candidate sources, and combined $p$-values for every class are reported. Particle and energy flux upper limits are given for selected candidate sources. These limits significantly constrain predictions of EeV proton emission models from non-transient Galactic and nearby extragalactic sources, as illustrated for the particular case of the Galactic center region.
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