A search for point sources of EeV photons
High Energy Astrophysical Phenomena
2014-06-26 v1
Abstract
Measurements of air showers made using the hybrid technique developed with the fluorescence and surface detectors of the Pierre Auger Observatory allow a sensitive search for point sources of EeV photons anywhere in the exposed sky. A multivariate analysis reduces the background of hadronic cosmic rays. The search is sensitive to a declination band from -85{\deg} to +20{\deg}, in an energy range from 10^17.3 eV to 10^18.5 eV. No photon point source has been detected. An upper limit on the photon flux has been derived for every direction. The mean value of the energy flux limit that results from this, assuming a photon spectral index of -2, is 0.06 eV cm^-2 s^-1, and no celestial direction exceeds 0.25 eV cm^-2 s^-1. These upper limits constrain scenarios in which EeV cosmic ray protons are emitted by non-transient sources in the Galaxy.
Keywords
Cite
@article{arxiv.1406.2912,
title = {A search for point sources of EeV photons},
author = {Pierre Auger Collaboration and A. Aab and P. Abreu and M. Aglietta and M. Ahlers and E. J. Ahn and I. Al Samarai and I. F. M. Albuquerque and I. Allekotte and J. Allen and P. Allison and A. Almela and J. Alvarez Castillo and J. Alvarez-Muñiz and R. Alves Batista and M. Ambrosio and A. Aminaei and L. Anchordoqui and S. Andringa and C. Aramo and F. Arqueros and H. Asorey and P. Assis and J. Aublin and M. Ave and M. Avenier and G. Avila and A. M. Badescu and K. B. Barber and J. Bäuml and C. Baus and J. J. Beatty and K. H. Becker and J. A. Bellido and C. Berat and X. Bertou and P. L. Biermann and P. Billoir and F. Blanco and M. Blanco and C. Bleve and H. Blümer and M. Boháčová and D. Boncioli and C. Bonifazi and R. Bonino and N. Borodai and J. Brack and I. Brancus and P. Brogueira and W. C. Brown and P. Buchholz and A. Bueno and M. Buscemi and K. S. Caballero-Mora and B. Caccianiga and L. Caccianiga and M. Candusso and L. Caramete and R. Caruso and A. Castellina and G. Cataldi and L. Cazon and R. Cester and A. G. Chavez and S. H. Cheng and A. Chiavassa and J. A. Chinellato and J. Chudoba and M. Cilmo and R. W. Clay and G. Cocciolo and R. Colalillo and L. Collica and M. R. Coluccia and R. Conceição and F. Contreras and M. J. Cooper and S. Coutu and C. E. Covault and A. Criss and J. Cronin and A. Curutiu and R. Dallier and B. Daniel and S. Dasso and K. Daumiller and B. R. Dawson and R. M. de Almeida and M. De Domenico and S. J. de Jong and J. R. T. de Mello Neto and I. De Mitri and J. de Oliveira and V. de Souza and L. del Peral and O. Deligny and H. Dembinski and N. Dhital and C. Di Giulio and A. Di Matteo and J. C. Diaz and M. L. Díaz Castro and P. N. Diep and F. Diogo and C. Dobrigkeit and W. Docters and J. C. D'Olivo and P. N. Dong and A. Dorofeev and Q. Dorosti Hasankiadeh and M. T. Dova and J. Ebr and R. Engel and M. Erdmann and M. Erfani and C. O. Escobar and J. Espadanal and A. Etchegoyen and P. Facal San Luis and H. Falcke and K. Fang and G. Farrar and A. C. Fauth and N. Fazzini and A. P. Ferguson and M. Fernandes and B. Fick and J. M. Figueira and A. Filevich and A. Filipčič and B. D. Fox and O. Fratu and U. Fröhlich and B. Fuchs and T. Fuji and R. Gaior and B. García and S. T. Garcia Roca and D. Garcia-Gamez and D. Garcia-Pinto and G. Garilli and A. Gascon Bravo and F. Gate and H. Gemmeke and P. L. Ghia and U. Giaccari and M. Giammarchi and M. Giller and C. Glaser and H. Glass and F. Gomez Albarracin and M. Gómez Berisso and P. F. Gómez Vitale and P. Gonçalves and J. G. Gonzalez and B. Gookin and A. Gorgi and P. Gorham and P. Gouffon and S. Grebe and N. Griffith and A. F. Grillo and T. D. Grubb and Y. Guardincerri and F. Guarino and G. P. Guedes and P. Hansen and D. Harari and T. A. Harrison and S. Hartmann and J. L. Harton and A. Haungs and T. Hebbeker and D. Heck and P. Heimann and A. E. Herve and G. C. Hill and C. Hojvat and N. Hollon and E. Holt and P. Homola and J. R. Hörandel and P. Horvath and M. Hrabovský and D. Huber and T. Huege and A. Insolia and P. G. Isar and K. Islo and I. Jandt and S. Jansen and C. Jarne and M. Josebachuili and A. Kääpä and O. Kambeitz and K. H. Kampert and P. Kasper and I. Katkov and B. Kégl and B. Keilhauer and A. Keivani and E. Kemp and R. M. Kieckhafer and H. O. Klages and M. Kleifges and J. Kleinfeller and R. Krause and N. Krohm and O. Krömer and D. Kruppke-Hansen and D. Kuempel and N. Kunka and G. La Rosa and D. LaHurd and L. Latronico and R. Lauer and M. Lauscher and P. Lautridou and S. Le Coz and M. S. A. B. Leão and D. Lebrun and P. Lebrun and M. A. Leigui de Oliveira and A. Letessier-Selvon and I. Lhenry-Yvon and K. Link and R. López and A. Lopez Agüera and K. Louedec and J. Lozano Bahilo and L. Lu and A. Lucero and M. Ludwig and H. Lyberis and M. C. Maccarone and M. Malacari and S. Maldera and J. Maller and D. Mandat and P. Mantsch and A. G. Mariazzi and V. Marin and I. C. Mariş and G. Marsella and D. Martello and L. Martin and H. Martinez and O. 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Papenbreer and G. Parente and A. Parra and S. Pastor and T. Paul and M. Pech and J. Pękala and R. Pelayo and I. M. Pepe and L. Perrone and R. Pesce and E. Petermann and C. Peters and S. Petrera and A. Petrolini and Y. Petrov and R. Piegaia and T. Pierog and P. Pieroni and M. Pimenta and V. Pirronello and M. Platino and M. Plum and A. Porcelli and C. Porowski and P. Privitera and M. Prouza and V. Purrello and E. J. Quel and S. Querchfeld and S. Quinn and J. Rautenberg and O. Ravel and D. Ravignani and B. Revenu and J. Ridky and S. Riggi and M. Risse and P. Ristori and V. Rizi and J. Roberts and W. Rodrigues de Carvalho and I. Rodriguez Cabo and G. Rodriguez Fernandez and J. Rodriguez Rojo and M. D. Rodríguez-Frías and G. Ros and J. Rosado and T. Rossler and M. Roth and E. Roulet and A. C. Rovero and C. Rühle and S. J. Saffi and A. Saftoiu and F. Salamida and H. Salazar and F. Salesa Greus and G. Salina and F. Sánchez and P. Sanchez-Lucas and C. E. Santo and E. Santos and E. M. Santos and F. Sarazin and B. Sarkar and R. Sarmento and R. Sato and N. Scharf and V. Scherini and H. Schieler and P. Schiffer and O. Scholten and H. Schoorlemmer and P. Schovánek and A. Schulz and J. Schulz and S. J. Sciutto and A. Segreto and M. Settimo and A. Shadkam and R. C. Shellard and I. Sidelnik and G. Sigl and O. Sima and A. Śmiałkowski and R. Šmída and G. R. Snow and P. Sommers and J. Sorokin and R. Squartini and Y. N. Srivastava and S. Stanič and J. Stapleton and J. Stasielak and M. Stephan and A. Stutz and F. Suarez and T. Suomijärvi and A. D. Supanitsky and M. S. Sutherland and J. Swain and Z. Szadkowski and M. Szuba and O. A. Taborda and A. Tapia and M. Tartare and N. T. Thao and V. M. Theodoro and J. Tiffenberg and C. Timmermans and C. J. Todero Peixoto and G. Toma and L. Tomankova and B. Tomé and A. Tonachini and G. Torralba Elipe and D. Torres Machado and P. Travnicek and E. Trovato and M. Tueros and R. Ulrich and M. Unger and M. Urban and J. F. Valdés Galicia and I. Valiño and L. Valore and G. van Aar and A. M. van den Berg and S. van Velzen and A. van Vliet and E. Varela and B. Vargas Cárdenas and G. Varner and J. R. Vázquez and R. A. Vázquez and D. Veberič and V. Verzi and J. Vicha and M. Videla and L. Villaseñor and B. Vlcek and S. Vorobiov and H. Wahlberg and O. Wainberg and D. Walz and A. A. Watson and M. Weber and K. Weidenhaupt and A. Weindl and F. Werner and B. J. Whelan and A. Widom and L. Wiencke and B. Wilczyńska and H. Wilczyński and M. Will and C. Williams and T. Winchen and D. Wittkowski and B. Wundheiler and S. Wykes and T. Yamamoto and T. Yapici and P. Younk and G. Yuan and A. Yushkov and B. Zamorano and E. Zas and D. Zavrtanik and M. Zavrtanik and I. Zaw and A. Zepeda and J. Zhou and Y. Zhu and M. Zimbres Silva and M. Ziolkowski},
journal= {arXiv preprint arXiv:1406.2912},
year = {2014}
}
Comments
28 pages, 10 figures, accepted for publication in The Astrophysical Journal