Survey of Surveys I: The largest catalogue of radial velocities for the Galaxy
M. Tsantaki, E. Pancino, P. Marrese, S. Marinoni, M. Rainer, N. Sanna,, A. Turchi, S. Randich, C. Gallart, G. Battaglia, T. Masseron

TL;DR
This paper presents the Survey of Surveys (SoS), a comprehensive, homogenized catalogue of nearly 11 million stellar radial velocities from multiple spectroscopic surveys, validated for accuracy and precision, enabling diverse Galactic studies.
Contribution
It introduces the largest homogenized radial velocity catalogue by merging major surveys with Gaia data, including a detailed calibration and validation process.
Findings
Largest homogenized RV catalogue with 11 million stars
RV zero-point accuracy of 0.16-0.31 km/s
Validated with open clusters and Gaia data
Abstract
In the present-day panorama of large spectroscopic surveys, the amount, diversity, and complexity of the available data continuously increase. We present a comprehensive catalogue, the Survey of Surveys (SoS), built by homogeneously merging the radial velocity (RV) determinations of the largest ground-based spectroscopic surveys to date, such as APOGEE, GALAH, Gaia-ESO, RAVE, and LAMOST, using Gaia as reference. We have devised a multi-staged procedure that includes: i) the cross match between Gaia and the spectroscopic surveys using the official Gaia cross-match algorithm, ii) the normalization of uncertainties using repeated measurements or the three-cornered hat method, iii) the cross calibration of the RVs as a function of the main parameters they depend on (magnitude, effective temperature, surface gravity, metallicity, and signal-to-noise ratio) to remove trends and zero point…
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Taxonomy
TopicsAstronomy and Astrophysical Research · Stellar, planetary, and galactic studies · Gamma-ray bursts and supernovae
