VizieR Online Data Catalog: Proxima Cen RV, FWHM and fluxes (Suarez Mascareno+, 2020)

We obtained 67 individual spectra as part of the ESPRESSO GTO, as part of programme ID 1102.C-744 (PI: F.Pepe). Measurements were taken in ESPRESSO's 1UT high resolution (HR) mode with 15 minutes of integration time. More information on the different observing modes can be found on the ESO instrument page. ESPRESSO is equipped with its own pipeline providing extracted and wavelength-calibrated spectra, as well as RV measurements. The RV measurements are determined by a Gaussian fit of the cross-correlation function (CCF) of the spectrum with a binary mask computed from a stellar template. The mask was created using an ESPRESSO spectrum of Proxima as a template. Lines were identified through an automatic line-searching algorithm based on the spectrum derivative. The pipeline, version 2.0.0, is fully available to download from the ESO pipeline website.

In combination with the ESPRESSO data we include the measurements taken between 2003 and 2017 with the High Accuracy Radial velocity Planet Searcher (HARPS) spectrograph. These data where obtained by the Geneva/Grenoble survey and the RedDots project, under programmes 072.C-0488, 082.C-0718, 183.C-0437, 191.C-0505, 096.C-0082, 099.C-0205, and 099.C-0880. This dataset is comprised of 196 individual measurements that include two high cadence campaigns in 2016 and 2017. The RVs were calculated using the TERRA package and have been obtained from. In 2015 HARPS was updated with new fibres, which improved its stability but also caused an RV offset with respect to previous measurements. For this reason we treat both HARPS datasets independently. The majority of the data were obtained without simultaneous calibration, which limits the stability of HARPS to a level of 1m/s.

Along with the previous data we include the RVs taken with the Ultraviolet and Visual Echelle Spectrograph (UVES) and analysed in Dmasso et al. 2020. This dataset consists of 77 nightly binned UVES RVs obtained between 2000 and 2007. The UVES data were obtained in one of the early RV surveys for planets around M-dwarfs under ESO programme IDs: 65.L-0428, 66.C-0446, 267.C-5700, 68.C-0415, 69.C-0722, 70.C-0044, 71.C-0498, 072.C-0495, 173.C-0606, and 078.C-0829 (PI: M. Kuerster). The data reduction and RV measurement is described in Butler et al., 2019AJ....158..251B. Cat. J/AJ/158/251). The UVES data do not include a measurement of the FWHM, as it is not easily available due to calibration by the iodine gas absorption cell.

(3 data files).