Astronomy and Astrophysics – Astrophysics
Scientific paper
2004-05-04
Astropart.Phys. 22 (2004) 249-261
Astronomy and Astrophysics
Astrophysics
20 pages, 15 figures, 13 tables, accepted for publication in Astropart. Phys
Scientific paper
10.1016/j.astropartphys.2004.08.
The longitudinal profile of extensive air showers is sensitive to the energy and type/mass of the primary particle. One of its characteristics, the atmospheric depth of shower maximum, is often used to reconstruct the elemental composition of primary cosmic rays. In this article, the impact of the atmospheric density profile on the reconstruction of the depth of maximum, as observed in fluorescence light measurements, is investigated. We consider in detail the atmospheric density profile and its time variations at the site of the southern Pierre Auger Observatory, using data that were obtained from meteorological radio soundings. Similar atmospheric effects are expected to be found also at other sites.
Bluemer Johannes
Engel R. R.
Keilhauer Bianca
Klages Hans Otto
Risse Markus
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