Table 3
Division of the SONG data into seven subsets.
| Subset | Observing dates | No of | Rotational |
|---|---|---|---|
| spectra | cycle(a) | ||
| set01 | 2015-11-04–2015-11-22 | 20 | 0.12–1.04 |
| set02 | 2015-11-24–2015-12-12 | 24 | 1.14–2.07 |
| set03 | 2015-12-23–2015-12-31 | 28 | 2.12–3.03 |
| set04 | 2016-01-04–2016-01-21 | 78(17)(b) | 3.23–4.14 |
| set05 | 2016-01-23–2016-02-09 | 67(12)(b) | 4.24–5.10 |
| set06 | 2016-02-09–2016-02-26 | 30 | 5.10–5.94 |
| set07 | 2016-03-01–2016-04-01 | 26 | 6.14–7.76 |
Notes. (a) The phases for the rotational cycle are calculated with the ephemeris given in Table 4 and set01 set as the cycle zero. (b) The first numbergives the total number of spectra obtained this time period, and the second number in parentheses is the number of higher S/N spectra obtained by combining the observations obtained in groups of sequential spectra. Details of the combined spectra are found in Table 2 available at CDS.
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