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Table 2
Log of the optical observations.
| Date | JD | Telescope | Grating | Wavelength | EW(Hα) | EW(Hβ) |
| (2 400 000+) | (l/mm) | range (Å) | (Å) | (Å) | ||
|
|
||||||
| 14-11-2009* | 55 150.41 | FLWO | 600 | 4760–6760 | −18.4 ± 1.0 | −2.98 ± 0.11 |
| 12-01-2010 | 55 209.37 | FLWO | 600 | 4730–6730 | −20.9 ± 1.5 | −3.43 ± 0.08 |
| 16-01-2010 | 55 213.21 | FLWO | 600 | 4740–6740 | −21.2 ± 0.8 | −3.60 ± 0.09 |
| 30-09-2010 | 55 470.60 | SKO | 1301 | 5300–7300 | −10.8 ± 0.4 | – |
| 30-10-2010 | 55 501.01 | FLWO | 1200 | 6200–7200 | −11.9 ± 0.6 | – |
| 29-11-2010 | 55 530.83 | FLWO | 1200 | 6200–7200 | −11.6 ± 0.6 | – |
| 03-10-2011 | 55 838.98 | FLWO | 1200 | 6200–7200 | −12.2 ± 0.7 | – |
| 01-11-2011 | 55 867.88 | FLWO | 1200 | 6200–7200 | −13.0 ± 0.7 | – |
| 08-11-2011 | 55 873.60 | SKO | 2400 | 3940–5040 | – | −2.23 ± 0.07 |
| 23-11-2011 | 55 889.93 | FLWO | 1200 | 6200–7200 | −14.1 ± 0.8 | – |
| 31-11-2011* | 55 927.71 | FLWO | 1200 | 6200–7200 | −15.4 ± 0.8 | – |
| 19-01-2012 | 55 946.79 | FLWO | 1200 | 6200–7200 | −15.3 ± 0.8 | – |
| 22-01-2012* | 55 927.71 | FLWO | 1200 | 6200–7200 | −15.2 ± 0.8 | – |
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