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|Title:||A targeted search for point sources of EeV photons with the Pierre Auger Observatory|
|Citation:||Astrophysical Journal Letters, 2017; 837(2):L25-1-L25-7|
|A. Aab … J. A. Bellido … S. G. Blaess ... R. W. Clay … M. J. Cooper ... B. R. Dawson … T. D. Grubb ... T. A. Harrison … G. C. Hill … P. H. Nguyen ... S. J. Saffi ... J. Sorokin ... T. Sudholz ... P. van Bodegom ... et al.|
|Abstract:||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.|
|Keywords:||Astroparticle physics; cosmic rays; methods: data analysis|
|Rights:||© 2017. The American Astronomical Society. All rights reserved.|
|Appears in Collections:||Physics publications|
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