Gaia Data Release 2 - Processing the spectroscopic data

Open Access

Table 1

External radial velocity catalogues used in the pipeline.

Cat Name	nb stars	nb transits		pipeline use
			km s⁻¹
CU6GB-cal	2568	34630	<0.1	calibration
XHip	5729	83366	<1.0	calibration

CU6GB-val	1819	16819	<0.3	validation
RAVE	9542	86035	<1.5	validation
APOGEE	8584	76177	<0.5	validation
SIM	650	4885	<0.1	validation

Notes. Thefirst two catalogues are used in wavelength calibration and are described in Sect. 4.1. The other catalogues (Sect. 4.2) are used to verify the RVS pipeline results. is the uncertainty associated with the radial velocity measurements provided by each catalogue.

Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.

Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.

Initial download of the metrics may take a while.