A fast and portable reimplementation of piskunov and valenti's optimal-extraction algorithm with improved cosmic-ray removal and optimal sky subtraction

A. Ritter, E. A. Hyde, Q. A. Parker

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

We present a fast and portable reimplementation of Piskunov and Valenti's optimal-extraction algorithm (Piskunov & Valenti 2002) in C/C++ together with full uncertainty propagation, improved cosmicray removal, and an optimal background-subtraction algorithm. This reimplementation can be used with IRAF and most existing data-reduction packages and leads to signal-to-noise ratios close to the Poisson limit. The algorithm is very stable, operates on spectra from a wide range of instruments (slit spectra and fibre feeds), and has been extensively tested for VLT/UVES, ESO/CES, ESO/FEROS, NTT/EMMI, NOT/ALFOSC, STELLA/SES, SSO/ WiFeS, and finally, P60/SEDM-IFU data.

Original languageEnglish
Pages (from-to)170-179
Number of pages10
JournalPublications of the Astronomical Society of the Pacific
Volume126
Issue number936
DOIs
Publication statusPublished - Feb 2014

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