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Improved reconstruction of a stochastic gravitational wave background with LISA by Flauger, Raphael; Karnesis, Nikolaos; Nardini, Germano; Pieroni, Mauro; Ricciardone, Angelo; Torrado, Jesús is a scholarly article available to read on EtoBox.

What is Improved reconstruction of a stochastic gravitational wave background with LISA about?

We present a data analysis methodology for a model-independent reconstruction of the spectral shape of a stochastic gravitational wave background with LISA. We improve a previously proposed reconstruction algorithm that relied on a single Time-Delay-Interferometry (TDI) channel by including a complete set of TDI channels. As in the earlier work, we assume an idealized equilateral configuration. We test the improved algorithm with a number of case studies, including reconstruction in the presence of two different astrophysical foreground signals. We find that including additional channels helps in different ways: it reduces the uncertainties on the reconstruction; it makes the global likelihood maximization less prone to falling into local extrema; and it efficiently breaks degeneracies between the signal and the instrumental noise.

Author

Flauger, Raphael; Karnesis, Nikolaos; Nardini, Germano; Pieroni, Mauro; Ricciardone, Angelo; Torrado, Jesús

Published

2020

Language

EN