Speaker
Roberto Iuppa
(INFN, Roma 2)
Description
EAS array dataset contains signal laying on different angular
scales: point-like and extended gamma-ray sources, as well as large and
intermediate scale cosmic-ray anisotropies. The separation of all these
contributions is crucial, mostly when they overlap with each other.
In recent years, the needlet transform has proved to be an effective tool
in the analysis of cosmological and astrophysical data, because of the
easiness of implementation and the remarkable double-localization
properties (in real and harmonic domain). Nevertheless, it has been never
used in cosmic-ray and very high energy gamma-ray physics so far.
Here the results of the application of this technique to the whole
ARGO-YBJ dataset are presented, pointing out the advantages of this new
approach
with respect to the standard methods of analysis employed in astroparticle
physics.
