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Proceedings Paper

Integrated data analysis in the age of precision spectroscopy: the ESPRESSO case
Author(s): Guido Cupani; Valentina D'Odorico; Stefano Cristiani; Jonay I. González-Hernández; Christophe Lovis; Sérgio Sousa; Giorgio Calderone; Roberto Cirami; Paolo Di Marcantonio; Denis Mégevand
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Paper Abstract

The Echelle SPectrograph for Rocky Exoplanets and Stable Spectral Observations (ESPRESSO) is an ultrastable spectrograph for the coudé-combined focus of the VLT. With its unprecedented capabilities (resolution up to fi 200,000, wavelength range from 380 to 780 nm; centimeter-per-second precision in wavelength calibration), ESPRESSO is a prime example of the now spreading science machine concept: a fully-integrated system carefully designed to perform direct scientific measurements on the data, in a matter of minutes from the execution of the observations. This approach is motivated by the very specific science cases of the instrument (search for terrestrial exoplanets with the radial velocity method; measure of the variation of fundamental constants using the spectral signatures of the inter-galactic medium) and is achieved by a dedicated tool for spectral analysis, the data analysis software or DAS, targeted to both stellar and quasar spectra. In this paper, we describe characteristics and performances of the DAS, with particular emphasis on the novel algorithms for stellar and quasar analysis (continuum fitting and interpretation of the absorption features).

Paper Details

Date Published: 26 July 2016
PDF: 16 pages
Proc. SPIE 9913, Software and Cyberinfrastructure for Astronomy IV, 99131T (26 July 2016); doi: 10.1117/12.2231379
Show Author Affiliations
Guido Cupani, INAF - Osservatorio Astronomico di Trieste (Italy)
Valentina D'Odorico, INAF - Osservatorio Astronomico di Trieste (Italy)
Stefano Cristiani, INAF - Osservatorio Astronomico di Trieste (Italy)
Jonay I. González-Hernández, Instituto de Astrofísica de Canarias (Spain)
Christophe Lovis, Univ. de Genève (Switzerland)
Sérgio Sousa, Univ. do Porto (Portugal)
Giorgio Calderone, INAF - Osservatorio Astronomico di Trieste (Italy)
Roberto Cirami, INAF - Osservatorio Astronomico di Trieste (Italy)
Paolo Di Marcantonio, INAF - Osservatorio Astronomico di Trieste (Italy)
Denis Mégevand, Univ. de Genève (Switzerland)


Published in SPIE Proceedings Vol. 9913:
Software and Cyberinfrastructure for Astronomy IV
Gianluca Chiozzi; Juan C. Guzman, Editor(s)

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