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Table 2
Log of spectroscopic observations.
| Date | Seeing | Instrument | Wavelength | Resolution | Aperture | Total integra- |
| (UT) | (′′) | coverage (Å) | (km s-1) | tion time (s) | ||
|
|
||||||
| 1999 09 03 | 1.0 | 3.6 m/CIGALE | 6693–6704 | 29 | 256x256 pixels (0.̋94 each) | 3180 |
| 2003 08 06 | 0.7 | VLT/FORS2 | 7675–9420 | 63 | slit ℬ (through knot ℬ), PA = 140° | 6075 |
| 2003 08 07 | 0.7 | VLT/FORS2 | 7675–9420 | 63 | slit  (through  and  ), PA = 57.5° |
5400 |
| 2003 08 07 | 0.65 | VLT/FORS2 | 3330–6120 | 160 | slit , PA = 57.5° |
180 |
| 2003 08 07 | 0.65 | VLT/FORS2 | 5120–8450 | 147 | slit , PA = 57.5° |
180 |
| 2004 11 06 | 0.65 | VLT/FLAMES/ARGUS | 8180–9340 | 29 | 22x14 element IFU (0.̋52 each), PA 90° | 14 400 |
| 2004 10 07 | 0.7 | VLT/VIMOS/IFU | 4150–6200 | 124 | 40x40 element IFU (0.̋66 each), PA 45° | 7100 |
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