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Table 3
Log of the optical spectroscopic observations.
| Date | MJD | Instrument | Grism | Wavelength | EW(Hα) | EW(Hβ) |
| set-up | number | range(Å) | (Å) | (Å) | ||
|
|
||||||
| 2006-02-15 | 53782.359 | EMMI/NTT | grism#6 | 5700–8700 | −40 ± 2 | – |
| 2007-09-17 | 54360.984 | EFOSC/3P6 | grism#14 | 3095–5085 | – | −4.3 ± 0.5 |
| 2007-09-17 | 54361.008 | EFOSC/3P6 | grism#18 | 4700–6770 | −45 ± 2 | −5.0 ± 0.9 |
| 2007-09-18 | 54361.993 | EFOSC/3P6 | grism#3 | 3050–6100 | – | −4.5 ± 0.5b |
| 2007-09-18 | 54362.025 | EFOSC/3P6 | grism#14 | 3095–5085 | – | −4.2 ± 0.5a |
| 2009-06-01 | 54983.078 | EFOSC/NTT | grism#13 | 3685–9315 | −45 ± 2 | −5.1 ± 0.9 |
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