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.
|Titolo:||A Targeted Search for Point Sources of EeV Photons with the Pierre Auger Observatory|
|Autori interni:||DI MATTEO, ARMANDO|
GHIA, PIERA LUISA
|Data di pubblicazione:||2017|
|Rivista:||THE ASTROPHYSICAL JOURNAL LETTERS|
|Appare nelle tipologie:||1.1 Articolo in rivista|