Integrated data analysis in the age of precision spectroscopy: the ESPRESSO case
Date Issued
2016
Author(s)
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González-Hernández, Jonay I.
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Lovis, Christophe
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Sousa, Sérgio
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Mégevand, Denis
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).
Coverage
Software and Cyberinfrastructure for Astronomy IV
All editors
Chiozzi, Gianluca; Guzman, Juan C.
Series
Volume
9913
Start page
99131T
Conferenece
Software and Cyberinfrastructure for Astronomy IV
Conferenece place
Edinburgh, UK
Conferenece date
26 June-1 July, 2016
Issn Identifier
0277-786X
Ads BibCode
2016SPIE.9913E..1TC
Rights
open.access
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