2005/07/25 by David Barnhill, P. Bauleo, Barnhill, D. +31
Engineering · Physics and Astronomy · #Astrophysics (astro-ph) #Astrophysics and Cosmic Phenomena #FOS: Physical sciences #Neutrino Physics Research #Particle Accelerators and Free-Electron Lasers
paper · pdf · doi:10.48550/arxiv.astro-ph/0507590
openalex publication_date 2005/07/25 · openalex created_date 2025/10/24 · openalex updated_date 2026/07/28
The Pierre Auger Observatory is being used to study cosmic rays with energies\nlarger than 10 EeV. An essential quantity that must be deduced from data is the\nlateral distribution function (LDF). Knowledge of the LDF is important for the\nreconstruction of the shower core and the shower direction. Here we describe\nhow the LDF is measured using the large sample of events recorded with the\nsurface detector (SD) array and with a small sample observed with the\nfluorescence detectors (FD). For hybrid events, in which SD and FD measurements\nof the same shower are available, the core position is much better constrained\nthan for SD-only events, thus providing an important cross-check on the LDF\ndetermined from SD measurements alone.\n