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Table 1
Log book of the imaging observations.
| Telescope | Date | CCD | Pix | Filter | Tint | Nexp | Seeing |
| (arcsec) | (Å) | (s) | (arcsec) | ||||
|
|
|||||||
| INT | 20 Mar. 1999 | 4 × 2048 × 4100 EEV | 0.33 | B | 300 | 2 | 1.0 |
| INT | 28 Apr. 2000 | 4 × 2048 × 4100 EEV | 0.33 | 6725 (80) | 1200 | 3 | 1.3 |
| INT | 28 Apr. 2000 | 4 × 2048 × 4100 EEV | 0.33 | (Gunn) r′ | 300 | 3 | 1.3 |
| TNG | 09 Feb. 2001 | 1024 × 1024 NICS | 0.25 | H | 60 | 9 | 0.8 |
| SPM | Apr. 2012 | 1024 × 1024 EEV | 0.35 | 6723 (80) | 600 | 30 | 1.4 |
| SPM | Apr. 2012 | 1024 × 1024 EEV | 0.35 | (Gunn) r | 60 | 26 | 1.4 |
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