A method is developed to search for air showers initiated by photons using data recorded by the surface detector of the Auger Observatory. The approach is based on observables sensitive to the longitudinal shower development, the signal risetime and the curvature of the shower front. Applying this method to the data, upper limits on the flux of photons of 3.8x10^-3 , 2.5x10^-3 and 2.2x10^-3 km^-2 sr^-1 yr^-1 above 10^19 eV, 2x10^19 eV; and 4x10^19 eV are derived, with corresponding limits on the fraction of photons being 2.0%, 5.1%, and 31% (all limits at 95% c.l.). These photon limits disfavor certain exotic models of sources of cosmic rays. The results also show that the approach adopted by the Auger Observatory to calibrate the shower e...
A method is developed to search for air showers initiated by photons using data recorded by the surf...
28 pages, 9 figures, preprint submitted to Elsevier ScienceA method is developed to search for air s...
28 pages, 9 figures, preprint submitted to Elsevier ScienceA method is developed to search for air s...
A method is developed to search for air showers initiated by photons using data recorded by the surf...
A method is developed to search for air showers initiated by photons using data recorded by the surf...
A method is developed to search for air showers initiated by photons using data recorded by the surf...
28 pages, 9 figures, preprint submitted to Elsevier ScienceA method is developed to search for air s...
28 pages, 9 figures, preprint submitted to Elsevier ScienceA method is developed to search for air s...
28 pages, 9 figures, preprint submitted to Elsevier ScienceA method is developed to search for air s...
28 pages, 9 figures, preprint submitted to Elsevier ScienceA method is developed to search for air s...
28 pages, 9 figures, preprint submitted to Elsevier ScienceA method is developed to search for air s...
28 pages, 9 figures, preprint submitted to Elsevier ScienceA method is developed to search for air s...
28 pages, 9 figures, preprint submitted to Elsevier ScienceA method is developed to search for air s...
A method is developed to search for air showers initiated by photons using data recorded by the surf...
A method is developed to search for air showers initiated by photons using data recorded by the surf...
A method is developed to search for air showers initiated by photons using data recorded by the surf...
28 pages, 9 figures, preprint submitted to Elsevier ScienceA method is developed to search for air s...
28 pages, 9 figures, preprint submitted to Elsevier ScienceA method is developed to search for air s...
A method is developed to search for air showers initiated by photons using data recorded by the surf...
A method is developed to search for air showers initiated by photons using data recorded by the surf...
A method is developed to search for air showers initiated by photons using data recorded by the surf...
28 pages, 9 figures, preprint submitted to Elsevier ScienceA method is developed to search for air s...
28 pages, 9 figures, preprint submitted to Elsevier ScienceA method is developed to search for air s...
28 pages, 9 figures, preprint submitted to Elsevier ScienceA method is developed to search for air s...
28 pages, 9 figures, preprint submitted to Elsevier ScienceA method is developed to search for air s...
28 pages, 9 figures, preprint submitted to Elsevier ScienceA method is developed to search for air s...
28 pages, 9 figures, preprint submitted to Elsevier ScienceA method is developed to search for air s...
28 pages, 9 figures, preprint submitted to Elsevier ScienceA method is developed to search for air s...
A method is developed to search for air showers initiated by photons using data recorded by the surf...
A method is developed to search for air showers initiated by photons using data recorded by the surf...
A method is developed to search for air showers initiated by photons using data recorded by the surf...
28 pages, 9 figures, preprint submitted to Elsevier ScienceA method is developed to search for air s...
28 pages, 9 figures, preprint submitted to Elsevier ScienceA method is developed to search for air s...