CERES: A Set of Automated Routines for Echelle Spectra

TL;DR

CERES is a modular software suite that automates the reduction, extraction, and analysis of echelle spectra across multiple instruments, enabling homogeneous and high-precision results.

Contribution

It introduces a flexible, automated pipeline framework for diverse echelle spectrographs, improving efficiency and consistency in spectral data processing.

Findings

Achieves high radial velocity precision for multiple spectrographs

Supports data from thirteen different instruments

Facilitates rapid and standardized spectral analysis

Abstract

We present the Collection of Elemental Routines for Echelle Spectra (CERES). These routines were developed for the construction of automated pipelines for the reduction, extraction and analysis of spectra acquired with different instruments, allowing the obtention of homogeneous and standardised results. This modular code includes tools for handling the different steps of the processing: CCD image reductions, identification and tracing of the echelle orders, optimal and rectangular extraction, computation of the wavelength solution, estimation of radial velocities, and rough and fast estimation of the atmospheric parameters. Currently, CERES has been used to develop automated pipelines for thirteen different spectrographs, namely CORALIE, FEROS, HARPS, ESPaDOnS, FIES, PUCHEROS, FIDEOS, CAFE, DuPont/Echelle, Magellan/Mike, Keck/HIRES, Magellan/PFS and APO/ARCES, but the routines can be easily used in order to deal with data coming from other spectrographs. We show the high precision in radial velocity that CERES achieves for some of these instruments and we briefly summarize some results that have already been obtained using the CERES pipelines.