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Table 6

Weighting of the different datasets and individual reduced χ2.

Observable Ref. N points NF χ 2

V Johnson (a) 162 1.546 1.42
V Walraven (b) 16 0.486 1.43
V Tycho (c, d) 163 1.550 4.37
B Tycho (c, d) 163 1.550 6.45
H P B2000 (c, d) 182 4.914* 6.97
J CTIO (e) 25 0.607 1.46
H CTIO (e) 25 0.607 0.51
K CTIO (e) 25 0.607 1.94

VWalravenBWalraven (b) 16 0.486 8.08
BJohnsonVJohnson (a) 56 0.909 1.51
VJohnsonIBessel (a) 164 1.555 0.57
VJohnsonRBessel (a) 27 0.631 0.95

(f)1 4 0.243
v rad (f)2 7 0.321 1.43
(g) 38 0.749

θ (UD) (f) 12 0.421 2.30

Notes.

(*)

The normalisation factor of the Hipparcos data has been multiplied by three to balance the very low uncertainties of the measurements, which would otherwise give to this dataset too much weight in the fitting process.

Reference. (a) Berdnikov 2008; (b) Walraven et al. 1964; (c) ESA (1997); (d) van Leeuwen et al. 1997; (e) Feast et al. 2008; (f) Present work (1CORALIE and 2HARPS); (g) Walraven et al. 1964.

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