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Table 1
Ground-based photometric time-series observations of TOI-2257.
| Date (UT) | Filter | Facility | Exp. time (s) | Notes |
|---|---|---|---|---|
| 2021 April 20 | I + z | SAINT-EX | 20 | Partial (egress) |
| 2021 April 20 | i′ | KeplerCam | 60 | Partial (egress) |
| 2021 April 20 | z′ | TRAPPIST-N | 60 | Partial (ingress) |
| 2021 May 25 | I + z | SAINT-EX | 25 | Full |
| 2021 May 25 | r′ | KeplerCam | 120 | Partial (ingress) |
| 2021 May 25 | z′ | KeplerCam | 90 | Partial (ingress) |
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