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Table 1.
Dates of FORS2 observations, average FWHM ε (in arcseconds), and DCR-related functions used in Eq. (1).
| Epoch | Year | ε | f1, x | f2, x | f1, y | f2, y |
|---|---|---|---|---|---|---|
| 1 | 2013.28541 | 0.62 | −0.6030 | −0.7187 | −0.4672 | −0.5568 |
| 2 | 2013.29928 | 0.67 | −0.0476 | −0.0585 | −0.5484 | −0.6746 |
| 3 | 2013.31565 | 0.55 | −0.0724 | −0.0873 | −0.5477 | −0.6602 |
| 4 | 2013.34301 | 0.87 | 0.0541 | 0.0656 | −0.5482 | −0.6644 |
| 5 | 2013.35959 | 0.79 | 0.5369 | 0.6555 | −0.4838 | −0.5907 |
| 6 | 2013.38392 | 0.83 | −0.0526 | −0.0656 | −0.5483 | −0.6835 |
| 7 | 2013.39776 | 0.64 | 0.4096 | 0.5067 | −0.5108 | −0.6319 |
| 8 | 2013.41408 | 0.69 | 0.2562 | 0.3176 | −0.5339 | −0.6620 |
| 9 | 2013.42505 | 0.71 | 0.3719 | 0.4497 | −0.5175 | −0.6257 |
| 10 | 2013.43866 | 0.68 | 0.2840 | 0.3391 | −0.5305 | −0.6334 |
| 11 | 2013.44969 | 0.73 | 0.5133 | 0.6454 | −0.4894 | −0.6152 |
| 12 | 2013.45784 | 0.69 | 0.4349 | 0.5260 | −0.5060 | −0.6119 |
| 13 | 2013.47425 | 0.90 | 0.4995 | 0.6075 | −0.4925 | −0.5989 |
| 14 | 2014.09650 | 0.72 | −0.1541 | −0.1876 | −0.5436 | −0.6619 |
| 15 | 2014.12097 | 0.58 | −0.3863 | −0.4714 | −0.5151 | −0.6285 |
| 16 | 2014.18656 | 0.72 | −0.2443 | −0.2937 | −0.5354 | −0.6436 |
| 17 | 2014.21130 | 0.80 | 0.1625 | 0.1985 | −0.5430 | −0.6632 |
| 18 | 2014.24126 | 0.68 | −0.0222 | −0.0272 | −0.5489 | −0.6737 |
| 19 | 2014.27135 | 0.68 | 0.1208 | 0.1465 | −0.5457 | −0.6618 |
| 20 | 2014.31484 | 0.64 | −0.3605 | −0.4392 | −0.5194 | −0.6327 |
| 21 | 2014.34219 | 0.88 | −0.2521 | −0.3028 | −0.5345 | −0.6419 |
| 22 | 2014.37776 | 0.80 | −0.0450 | −0.0548 | −0.5486 | −0.6681 |
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