Table A.4.
Information on the PS1 and ZTF stacked images obtained in the decade before the outburst of AT 2021afy, and detection limits.
| Initial date | Initial MJD | Final date | Final MJD | Average MJD | Filter | magnitude | CCD code |
|---|---|---|---|---|---|---|---|
| 2011-05-31 | 55712.31 | 2012-05-16 | 56063.55 | 55888.13 | g | > 23.05 | PS1 |
| 2010-07-01 | 55378.42 | 2013-07-03 | 56476.40 | 56069.75 | r | > 23.20 | PS1 |
| 2011-05-19 | 55700.48 | 2014-07-11 | 56849.38 | 56396.19 | i | > 23.40 | PS1 |
| 2010-03-01 | 55256.57 | 2014-09-17 | 56917.23 | 55928.69 | z | > 22.81 | PS1 |
| 2018-03-26 | 58203.42 | 2018-09-08 | 58369.23 | 59286.82 | g | > 20.95 | ZTF-c15 |
| 2018-03-09 | 58186.48 | 2018-05-20 | 58258.25 | 59222.37 | r | > 22.05 | ZTF-c15 |
| 2018-04-20 | 58228.51 | 2018-09-06 | 58367.14 | 59297.82 | i | > 21.33 | ZTF-c15 |
| 2020-12-11 | 59194.55 | 2020-12-13 | 59196.57 | 59195.64 | r | > 21.11 | ZTF-c15 |
| 2020-12-15 | 59198.56 | 2020-12-18 | 59201.57 | 59199.56 | r | > 21.11 | ZTF-c15 |
Notes. The table reports the epoch and MJD of the first image (Columns 1 and 2), the epoch and MJD of the last image (Columns 3 and 4), the average MJD of the stacked image (Column 5), the filter (Column 6), the detection magnitude limits (Column 7), and the identificatione code of the stacked images (Column 8).
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