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Table 1

Some characteristics of the sample stars.

Spectral type M bol B − V

α   Boo K2 IIIp −0.90 ± 0.05 1.23
α   Cet M2 III −3.09 ± 0.13 1.66
α   Tau K5 III −1.72 ± 0.06 1.54
β   And M0 III −3.14 ± 0.11 1.58
β   Peg M2.5 III −3.34 ± 0.11 1.67
γ   Dra K5 III −2.07 ± 0.07 1.52
β   UMi K4 III −1.71 ± 0.07 1.51
ι   Aur K3 II −2.4 1.55
σ   Lib M3/M4 III −3.6 1.65

Notes. The values for Mbol are taken from Decin et al. (2003a), Kashyap et al. (1994) and Eggen & Stokes (1970). No uncertainties were given in these articles on the values of Mbol for ι   Aur and σ   Lib.

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