A Flexible and Modular Data Reduction Library for Fiber-fed Echelle Spectrographs

TL;DR

This paper presents a flexible, modular data reduction library designed for fiber-fed echelle spectrographs, capable of processing data from multiple instruments like ESPRESSO, HARPS, and HARPS-N, to produce high-precision spectra for exoplanet research.

Contribution

It introduces a configurable, instrument-agnostic data reduction pipeline built within the ESO environment, supporting multiple spectrographs and tested on real and simulated data.

Findings

Successfully tested on HARPS and HARPS-N data

Configurable for different spectrographs via static tables

Produces high-accuracy 1D and 2D spectra

Abstract

Within the ESPRESSO project a new flexible data reduction library is being built. ESPRESSO, the Echelle SPectrograph for Rocky Exoplanets and Stable Spectral Observations is a fiber-fed, high-resolution, cross-dispersed echelle spectrograph. One of its main scientific goals is to search for terrestrial exoplanets using the radial velocity technique. A dedicated pipeline is being developed. It is designed to be able to reduce data from different similar spectrographs: not only ESPRESSO, but also HARPS, HARPS-N and possibly others. Instrument specifics are configurable through an input static configuration table. The first written recipes are already tested on HARPS and HARPS-N real data and ESPRESSO simulated data. The final scientific products of the pipeline will be the extracted 1-dim and 2-dim spectra. Using these products the radial velocity of the observed object can be computed with high accuracy. The library is developed within the standard ESO pipeline environment. It is being written in ANSI C and makes use of the Common Pipeline Library (CPL). It can be used in conjunction with the ESO tools Esorex, Gasgano and Reflex in the usual way.