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Table 2
Observation log of obtained spectroscopy of 4 CVn.
| Season | Start date | End date | Nights | N |
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| 2008 | 2008-Jan.-19 | 2008-May-20 | 33 | 874 |
| 2010 | 2010-Feb.-18 | 2010-May-26 | 33 | 767 |
| 2011 | 2010-Dec.-14 | 2011-Jun.-21 | 20 | 488 |
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| Total | 2008-Jan.-19 | 2011-Jun.-21 | 86 | 2129 |
Notes. Nights denotes the number of nights observed in each specific year; N is the number of scientific spectra taken of 4 CVn. Not all spectra were used in the analysis because of cosmic-ray hits or very low S/N.
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