Speaker
L. Nellen
(I. DE CIENCIAS NUCLEARES, UNAM)
Description
The Pierre Auger Observatory consists of two sites with several
semi-autonomous detection systems. Each component, and in some cases
each event, provides a preferred coordinate system for simulation and
analysis. To avoid a proliferation of coordinate systems in the
offline software of the Pierre Auger Observatory, we have developed a
geometry package that allows the treatment of fundamental geometrical
objects in a coordinate-independent way. This package makes
transformations between coordinate systems transparent to the user,
without taking the control about the internal representation
completely from the user.
The geometry package allows easy combination of the results from
different sub-detectors, at the same time as ensuring that effects
like the earth curvature, which is non-negligible on the scale of a
single Auger site, are dealt with properly.
The internal representations used are Cartesian. For interfacing,
including I/O, the package includes support for Cartesian coordinates,
geodetic (latitude/longitude and UTM), and astrophysical coordinate
systems.
Primary authors
L. Nellen
(I. DE CIENCIAS NUCLEARES, UNAM)
L. Prado Jr
(State University of Campinas)
S. Argiro
(University of Torino)
T. Paul
(Northeastern University)
T. Porter
(Louisiana State University)
