INVESTIGADORES
TUEROS Matias Jorge
congresos y reuniones científicas
Título:
The UHECR spectrum measured at the Pierre Auger Observatory and its astrophysical implications
Autor/es:
THE PIERRE AUGER COLLABORATION (AUTOR 384 DE 427); M. J. TUEROS
Lugar:
Mérida, México
Reunión:
Conferencia; 30th International Cosmic Ray Conference; 2007
Institución organizadora:
Instituto de Geofísica, UNAM
Resumen:
The Southern part of the Pierre Auger Observatory is nearing completion, and has been in stable operation since January 2004 while it has grown in size. The large sample of data collected so far has led to a significant improvement in the measurement of the energy spectrum of UHE cosmic rays over that previously reported by the Pierre Auger Observatory, both in statistics and in systematic uncertainties. We summarize two measurements of the energy spectrum, one based on the high-statistics surface detector data, and the other of the hybrid data, where the precision of the fluorescence measurements is enhanced by additional information from the surface array. The complementarity of the two approaches is emphasized and results are compared. Possible astrophysical implications of our measurements, and in particular the presence of spectral features, are discussed.