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Table 2

Parameters of the linear correlation between stellar activity index () and EUV fluxin the 90−911 Å wavelength range described by Eq. (2).

Sp. Type c1 c2 RMS PCC
F, G, K 1.90 ± 0.41 3.90 ± 1.96 0.40 0.8748
M 1.20 ± 0.36 2.23 ± 1.64 0.48 0.8753

Notes. Column 4 gives the RMS of the correlation, while Col. 5 gives the PCCs.

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