INVESTIGADORES
TUEROS Matias Jorge
congresos y reuniones científicas
Título:
Aerosol characterization at the Pierre Auger Observatory
Autor/es:
THE PIERRE AUGER COLLABORATION (AUTOR 434 DE 474); M. TUEROS
Lugar:
Rio de Janeiro
Reunión:
Conferencia; 33rd International Cosmic Ray Conference (ICRC 2013); 2013
Institución organizadora:
International Union of Pure and Applied Physics (IUPAP)
Resumen:
Abstract: The Pierre Auger Observatory is a hybrid facility composed of surface and fluorescence detectors (denoted as SD and FD, respectively), where the FD system sets the energy scale in cosmic ray showerreconstruction. Atmospheric components attenuate the fluorescence light emitted by the de-excitation of atmospheric nitrogen, previously excited by the charged particles of the shower. Amongst these components,atmospheric aerosols are the ones with the largest fluctuations, being responsible for one of the major uncertainties in shower reconstruction with FD data. We present a detailed characterization of aerosols. They are collected at the Observatory and analyzed, in morphology and elemental composition, with experimental techniques used for the first time in a cosmic ray observatory: gravimetry, PIXE and SEM/EDX. An analysis of wind trajectories using the program HYSPLIT is used to understand the sources and the evolution of aerosols. The aerosols are further characterized by the FRAM, an optical telescope employed to perform CCD photometry of selected Landolt fields, in which we observe sets of precisely measured standard stars at various wavelengths. Using this photometric information we then compute the Angstrom coefficients that also characterize the size of aerosols.