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Table 1:

Log of observations of Pollux (for details, see Sects. 2 and 3).
Date Instrument Stokes V S/N HJD Phase $B_{\rm l}$ $\sigma $ S-index RV
        (2 450 000+)   G G Ca  II km s-1
29 Sep.-02 Oct. 07 ESPaDOnS 4 1196 4375.1 0.25 -0.67 0.26 0.1090 3.651
12 Dec.-18 Dec. 07 NARVAL 6 1792 4450.7 0.38 -0.51 0.14 0.1234 (3.557)
31 Dec. 07 ESPaDOnS 5 1327 4467.0 0.40 -0.57 0.19 0.1081 3.538
05 Apr. 08 NARVAL 4 1986 4562.4 0.57 -0.15 0.15 0.1263 3.532
15 Apr. 08 NARVAL 8 960 4572.4 0.58 -0.12 0.23 0.1267 3.508
16 Sep. 08 NARVAL 8 1566 4726.7 0.85 -0.45 0.13 0.1249 3.551
20 Sep.-21 Sep. 08 NARVAL 8 1328 4731.2 0.86 -0.21 0.16 0.1262 3.576
30 Sep. 08 NARVAL 8 1955 4740.7 0.87 -0.27 0.11 0.1240 3.584
21 Dec. 08 NARVAL 8 1532 4822.6 0.01 -0.33 0.14 0.1255 3.616
25 Feb. 09 NARVAL 8 1934 4888.3 0.12 -0.59 0.11 0.1259 3.633
12 Mar. 09 NARVAL 8 1190 4903.4 0.15 -0.69 0.14 0.1239 3.640
18 Mar. 09 NARVAL 15 1528 4909.4 0.16 -0.56 0.10 0.1225 (3.634)
18 Oct. 08 ESPaDOnS 1 1839 4759.1 0.90 -1.40 0.35 0.1102 3.586
Notes: Individual columns report dates of observation, instrument, number of averaged Stokes V series, mean peak S/N in Stokes I for one spectrum, mean HJD, Phase according to Hatzes et al. (2006), $B_{\rm l}$ and its error in G, the S-index for Ca  II H and K, and the radial velocity measured from the LSD Stokes I profile.

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