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Table 3

Constants describing the scaling function of measurement precision in RV and vsini as a function of S/N and vsini (see Eqs. (2) and (4)).

Characteristics of order-sorting filter
Filter HR10 HR15N HR21
Mean λ (Å) 5470 6630 8728
Resolution 19 800 17 000 16 200
Range λ (Å) 270 370 504

Parameters defining the scaling function SRV (Eq. (3))
A (km s-1) 0.22 ± 0.02 0.25 ± 0.02 0.26 ± 0.02
C (km s-1) 13.6 15.8 16.6

Average value of B for the mix of stars analysed in this paper
B (km s-1) 2.3 5.0 7.1
Variation of B with template temperature (Sect. 4.1)
B (3200–4000 K) 1.8 ± 0.2 3.9 ± 0.1 7.3 ± 0.2
B (4000–4800 K) 1.7 ± 0.1 4.4 ± 0.2 6.8 ± 0.2
B (4800–5600 K) 2.4 ± 0.1 4.9 ± 0.1 6.8 ± 0.1
B (5600–6400 K) 3.5 ± 0.2 7.8 ± 0.3 7.8 ± 0.2
B (6400–7200 K) 5.1 ± 0.6 10.3 ± 1.1 9.2 ± 1.0

Parameters defining the scaling function Svsini (Eq. (4))
α 0.047 ± 0.005
C (km s-1) 15.8

Average value of β for the mix of stars analysed in this paper
β 0.63
Variation of β with template temperature (Sect. 4.4)
β (3200–4000 K) 0.51 ± 0.02
β (4000–4800 K) 0.60 ± 0.04
β (4800–5600 K) 0.69 ± 0.08
β (5600–6400 K) 0.80 ± 0.06
β (6400–7200 K) 1.22 ± 0.15

Notes. Where C is calculated from Eq. (4) assuming a limb darkening coefficient u = 0.6 (Claret Diaz-Cordoves & Gimenez 1995).

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