کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1771062 1020722 2011 11 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
The Lateral Trigger Probability function for the Ultra-High Energy Cosmic Ray showers detected by the Pierre Auger Observatory
موضوعات مرتبط
مهندسی و علوم پایه فیزیک و نجوم نجوم و فیزیک نجومی
پیش نمایش صفحه اول مقاله
The Lateral Trigger Probability function for the Ultra-High Energy Cosmic Ray showers detected by the Pierre Auger Observatory
چکیده انگلیسی

In this paper we introduce the concept of Lateral Trigger Probability (LTP) function, i.e., the probability for an Extensive Air Shower (EAS) to trigger an individual detector of a ground based array as a function of distance to the shower axis, taking into account energy, mass and direction of the primary cosmic ray. We apply this concept to the surface array of the Pierre Auger Observatory consisting of a 1.5 km spaced grid of about 1600 water Cherenkov stations. Using Monte Carlo simulations of ultra-high energy showers the LTP functions are derived for energies in the range between 1017 and 1019 eV and zenith angles up to 65°. A parametrization combining a step function with an exponential is found to reproduce them very well in the considered range of energies and zenith angles. The LTP functions can also be obtained from data using events simultaneously observed by the fluorescence and the surface detector of the Pierre Auger Observatory (hybrid events). We validate the Monte Carlo results showing how LTP functions from data are in good agreement with simulations.


► We introduce the concept of Laternal Trigger Probability functions for EAS.
► We apply this concept to the surface array of the Pierre Auger Observatory.
► Using simulations LTPs are derived for energies between 1017 and 1019 eV.
► The LTPs can also be obtained from data using hybrid events.
► We show how LTPs from data are in good agreement with simulations.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Astroparticle Physics - Volume 35, Issue 5, December 2011, Pages 266–276
نویسندگان
, , , , , , , , , , , , , , , , , , ,