The Gaia-ESO Survey: Empirical determination of the precision of stellar radial velocities and projected rotation velocities

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Table 1

Numbers of short and long term repeat GIRAFFE observations of RV and vsini used for open clusters with order-sorting filter HR15N.

Name	Age	Ref.	Number of repeat observations
	(Myr)		RV, S/N> 5		vsini, >5 km s^-1
			short	long	short	long
			term	term	term	term

Rho Ophiuchi	1	1	222	33	34	2
Chamaeleon I	2	2	617	81	108	22
Gamma Velorum	6	3	1719	523	382	80
IC 4665	30	4	448	25	43	1
NGC 2264	3	5	2010	333	717	142
NGC 2516	140	6	853	134	266	36
NGC 2547	35	7	1045	515	321	164
NGC 6633	600	8	1403	243	103	14
Field giants	–		112	9	30	2

Reference. (1) Luhman & Rieke (1999); (2) Luhman (2007); (3) Jeffries et al. (2009); (4) Manzi et al. (2008); (5) Naylor (2009); (6) Meynet et al. (1993); (7) Jeffries & Oliveira (2005); (8) Strobel (1991).

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