Table 1
Log of the imaging data.
| Date | JD | Telescope+ | Filter | Total exp. | Nr. of | Seeing |
|---|---|---|---|---|---|---|
| instrument | CW/FWHM (Å) | time (s) | frames | (″) | ||
| 1991-07-06a | 2448443.794005 | NTT+EMMI | Hα+[N II] 6568/73 | 300, 30, 1 | 1, 1, 1 | 1.1 |
| 1998-09-04 | 2451061.541661 | NOT+ALFOSC | Hα+[N II] 6577/180 | 100 | 1 | 1.3 |
| 2009-07-08*,b | 2455021.682257 | NOT+ALFOSC | Hα+[N II] 6577/180 | 100, 2 | 1, 1 | 1.3, 1.2 |
| 2012-09-05 | 2456175.775466 | VLT+FORS2 | Hα+[N II] 6563/61 | 90 | 3 | 0.7 |
| 1997-07-13a | 2450643.774977 | NOT+ALFOSC | [N II] 6584/10 | 120, 20, 5 | 1, 1, 1 | 1.1 |
| 2002-06-26 | 2452452.731273 | NOT+ALFOSC | [N II] 6588/9 | 600 | 1 | 0.8 |
| 2002-06-27 | 2452453.769479 | NOT+ALFOSC | [O III] 5008/30 | 60, 30, 10 | 1, 1, 1 | 0.9 |
| 2007-09-05* | 2454349.620787 | NOT+ALFOSC | [O III] 5007/30 | 400, 30 | 1, 1 | 0.7, 0.6 |
| 2009-07-08 | 2455021.683102 | NOT+ALFOSC | [O III] 5007/30 | 60 | 1 | 1.2 |
| 2009-08-24 | 2455068.647587 | NOT+ALFOSC | [O III] 5007/30 | 600 | 2 | 0.6 |
| 2011-09-05 | 2455810.571493 | NOT+ALFOSC | [O III] 5007/30 | 180, 40 | 1, 1 | 0.9, 0.8 |
| 2012-09-05 | 2456175.775466 | VLT+FORS2 | [O III] 5001/57 | 300, 1 | 3, 1 | 0.7 |
| 1997-07-15a | 2450645.740139 | NOT+ALFOSC | [O II] 3727/30 | 900 | 3 | 1.1 |
| 1998-09-04c | 2451061.541661 | NOT+ALFOSC | [O II] 3727/30 | 300 | 1 | 1.3 |
| 2002-06-27 | 2452453.769479 | NOT+ALFOSC | [O II] 3725/50 | 900 | 1 | 1.3 |
| 2007-09-05* | 2454349.620787 | NOT+ALFOSC | [O II] 3726/51 | 600 | 1 | 0.7 |
| 2009-08-24 | 2455068.647587 | NOT+ALFSOC | [O II] 3726/51 | 1200 | 2 | 0.8 |
| 2011-09-05 | 2455810.571493 | NOT+ALFSOC | [O II] 3726/51 | 600 | 1 | 0.9 |
| 2012-09-05 | 2456175.775466 | VLT+FORS2 | [O II] 3717/73 | 540, 10 | 3, 1 | 0.8 |
| 2007-09-05* | 2454349.620787 | NOT+ALFOSC | [O I] 6308/29 | 120, 30 | 1, 1 | 0.6 |
| 2009-08-24 | 2455068.647587 | NOT+ALFSOC | [O I] 6300/30 | 600 | 2 | 0.6 |
Notes. The first column lists the start of the observing run. In the second column JD is the Julian Date at mid point of the observations. Column 3 lists the telescope and instrument used. Column 4 contains the nebular lines included and the central wavelength and the FWHM of the filter. Column 5 is the total exposure time, Col. 6 is the number of frames added together. In Col. 7 there is the FWHM seeing as measured on the detector. (a) Published in Navarro et al. (2003) and Gonçalves et al. (2003). (b) * indicate the reference epoch for the pixel by pixel matching for a given filter (see Sect. 3). (c) Published in Corradi (2003).
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