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Table 1.
Spectroscopic data.
| Epoch | Date | Observed BEL | Facility | Reference |
|---|---|---|---|---|
| 1a | 15-04-1999 | C IV, C III], Mg II | HST | Goicoechea et al. (2005) |
| 1b | 02-06-2000 | C IV, C III], Mg II | HST | Goicoechea et al. (2005) |
| 2 | 12-01-2008 | C IV, C III], Mg II | MMT | Motta et al. (2012) |
| 3 | 29-01-2009 ( * ) | C IV, C III] | NOT | GLENDAMA |
| 4 | 03/2010 ( * ) | C IV, C III] | NOT | GLENDAMA |
| 5 | 10/2010 ( * ) | Mg II | LT | GLENDAMA |
| 6 | 03/2011 ( * ) | Mg II | LT | GLENDAMA |
| 7 | 04/2011 ( * ) | Mg II | LT | GLENDAMA |
| 8 | 12/2011 ( * ) | Mg II | LT | GLENDAMA |
| 9 | 18-12-2011 ( * ) | C IV, C III] | NOT | GLENDAMA |
| 10 | 14-03-2013 ( * ) | C IV, C III] | NOT | GLENDAMA |
| 11 | 05-03-2015 | C III], Mg II | LT | GLENDAMA |
| 12 | 19-11-2015 ( * ) | C III], Mg II | LT | Gil-Merino et al. (2018) |
| 13 | 12-03-2016 ( * ) | C IV, C III], Mg II | WHT | Fian et al. (2021b) |
| 14 | 17-01-2017 | C III], Mg II | LT | Gil-Merino et al. (2018) |
Notes. ( * )The spectra from multiple observations conducted within a short time frame (such as several exposures taken on the same night or several observations within a month) were combined by taking their average.
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