Diogo G. S. Marques
Departamento de Física e Astronomia, Faculdade de Ciências, Universidade do Porto, Portugal

Abstract
SNT is a software, written in Python, that uses the computational geometry concept of alpha-shape to produce an upper envelope for the spectrum. For this end, relevant points are selected by the algorithm, called “anchors” which are then, after some processing to remove outliers, interpolated by a linear or cubic polynomial. The final output of the program is the function that models a continuum line of the upper envelope of the flux values. The code uses several parameters, which can be easily changed, to produce different continua. In this talk, I intend to explain what these parameters are, and how they will influence the end result, as well as a brief overview of the theory and implementation of the algorithm. This program is essentially an implementation of the method described in RASSINE (Cretignier et al. 2020), with some slight adaptations. It aims to improve its practical use, as well as understanding its functionality, by using modular code, and a clear description of its input, output and parameters.

2023 September 28, 13:30

IA/U.Porto
Centro de Astrofísica da Universidade do Porto (Classroom)
Rua das Estrelas, 4150-762 Porto