Table 3
Spectropolarimetric observations, activity indicators and Bl measurements for 31 Com in 2013.
| Date | HJD | Phases | S/N | S-index | Hα | Ca IRT | Bl | σ | ||
| 2 450 000 + | index | index | (G) | (G) | ||||||
|
|
||||||||||
| 20 Apr. 2013 | 6403.597 | 0.54 | 48735 | 0.372 | 0.2702 | 0.910 | 5.2 | 4.1 | ||
| 21 Apr. 2013 | 6404.599 | 0.69 | 39671 | 0.401 | 0.3011 | 0.918 | 3.9 | 5.1 | ||
| 22 Apr. 2013 | 6405.537 | 0.83 | 56620 | 0.419 | 0.3130 | 0.924 | 3.2 | 3.6 | ||
| 23 Apr. 2013 | 6406.564 | 0.98 | 49814 | 0.420 | 0.3118 | 0.918 | –6.8 | 4.1 | ||
| 24 Apr. 2013 | 6407.569 | 0.13 | 50150 | 0.423 | 0.3159 | 0.923 | 9.5 | 4.0 | ||
| 04 May 2013 | 6417.420 | 0.58 | 57643 | 0.389 | 0.2977 | 0.903 | –9.9 | 3.5 | ||
| 05 May 2013 | 6418.414 | 0.72 | 55198 | 0.399 | 0.3172 | 0.906 | 3.3 | 3.7 | ||
| 12 May 2013 | 6425.390 | 0.75 | 59246 | 0.397 | 0.3158 | 0.907 | 2.3 | 3.4 | ||
| 13 May 2013 | 6426.410 | 0.90 | 59632 | 0.399 | 0.3112 | 0.905 | 0.3 | 3.4 | ||
| 14 May 2013 | 6427.433 | 0.05 | 58354 | 0.401 | 0.3035 | 0.908 | –2.7 | 3.5 | ||
Notes.For ephemeris computation HJD0 = 2 454 101.5 and a rotational period of 6
8 were used. The presented S/N is for LSD Stokes V profiles. Scaling parameters (line depth, wavelength, and landé factor) are equal to 0.530, 562 nm, and 1.29, respectively.
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