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Table 1.
General information about the data of observations of Q2237+0305 used to determine the interband time delays in this work.
| Filter | Season duration | Number of data | Photometry error | FWHM |
|---|---|---|---|---|
| (days) | points | |||
| R, season 2004 | 192 | 75 | 0.0142 | 1.0475 |
| R, season 2005 | 202 | 98 | 0.0141 | – |
| V, season 2004 | 176 | 48 | 0.0169 | 1.0658 |
| V, season 2005 | 178 | 38 | 0.0170 | 1.0945 |
| I, season 2004 | 177 | 52 | 0.0149 | 0.9842 |
| I, season 2005 | 178 | 39 | 0.0128 | 0.9938 |
Notes. Columns are: duration of seasons, number of data points, photometry error, and seeing (full width at half maximum) averaged over each season.
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