A Targeted Search for Point Sources of EeV Photons with the Pierre Auger Observatory

作者：Aab A^*; Abreu P; Aglietta M; Al Samarai I; Albuquerque I F M; Allekotte I; Almela A; Alvarez Castillo J; Alvarez Muniz J; Anastasi G A; Anchordoqui L; Andrada B; Andringa S; Aramo C; Arqueros F; Arsene N; Asorey H; Assis P; Aublin J; Avila G; Badescu A M; Balaceanu A; Barreira Luz R J; Beatty J J; Becker K H; Bellido J A; Berat C; Bertaina M E; Bertou X; Biermann P L; Billoir P; Biteau J; Blaess S G; Blanco A

来源：Astrophysical Journal Letters, 2017, 837(2): L25.

DOI：10.3847/2041-8213/aa61a5

• astroparticle physics
• cosmic rays
• methods: data analysis

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.

• 出版日期2017-3-10
• 单位东北大学