Table 1
Log of the transit observations of K2-19 b and c.
| Epoch | Epoch | Mid-transit date (UT) | Telescope | Band | Exposure time | Coverage | Data | Source |
|---|---|---|---|---|---|---|---|---|
| b | c | YYYY-MM-DD | Instrument | (s) | ||||
| 0 to 9 | 0 to 6 | 2014-06-04 to 2014-08-19 | K2 | Kepler | 1765 | Full | lc | This work |
| 30 | 2015-01-28 | FLWO 1.2 m | i’ | 30 | Partial | tt | Narita et al. (2015) | |
| 34 | 2015-03-01 | TRAPPIST-South | Exo | 10 | Full | tt | Narita et al. (2015) | |
| 34 | 2015-03-01 | NITES | no filter | 20 | Partial | lc | Armstrong et al. (2015) | |
| 35 | 2015-03-09 | 1-m C2PU Omicron | Johnson-R | 60 | Full | lc | Barros et al. (2015) | |
| 36 | 2015-03-17 | Belesta 82-cm | Johnson-R | 120 | Full | lc | Barros et al. (2015) | |
| 41 | 2015-04-25 | OAO 1.88 m / MuSCAT | g′, r′ ,zS | 60, 30, 60 | Partial | tt | Narita et al. (2015) | |
| 133 | 2017-04-23 | Spitzer | 4.5 µm | 2 | Full | tt | Petigura et al. (2020) | |
| 87 | 2017-04-08 | Spitzer | 4.5 µm | 2 | Full | tt | Petigura et al. (2020) | |
| 141 | 2017-06-25 | LCOGT-SAAO 1 m | i’ | 120 | Partial | lc | This work | |
| 150 | 2017-09-05 | Spitzer | 4.5 µm | 2 | Full | tt | Petigura et al. (2020) | |
| 102 | 2017-10-04 | Spitzer | 4.5 µm | 2 | Full | tt | Petigura et al. (2020) | |
| 311 | 2021-03-03 | ExTrA T23 | ExTrA | 60 | Full | lc | This work | |
| 343, 345 | 228, 229 | 2021-11-11 to 2021-11-27 | TESS s45 | TESS | 120 | Full | lc | This work |
| 346 to 349 | 230, 232 | 2021-12-05 to 2021-12-29 | TESS s46 | TESS | 120 | Full | lc | This work |
| 361 | 2022-04-03 | ExTrA T23 | ExTrA | 60 | Partial | lc | This work | |
| 362 | 2022-04-11 | ExTrA T23 | ExTrA | 60 | Partial | lc | This work | |
| 398 | 2023-01-21 | ExTrA T23 | ExTrA | 60 | Partial | lc | This work | |
| 399 | 2023-01-29 | ExTrA T123 | ExTrA | 60 | Full | lc | This work | |
| 400 | 2023-02-06 | ExTrA T123 | ExTrA | 60 | Partial | lc | This work | |
| 272 | 2023-04-19 | ExTrA T23 | ExTrA | 60 | Full | lc | This work | |
| 436, 438 | 290, 291 | 2023-11-18 to 2023-12-04 | TESS s72 | TESS | 120 | Full | lc | This work |
| 449 | 2024-02-29 | CHEOPS | CHEOPS | 60 | Intermittent | lc | This work | |
| 449 | 2024-02-29 | ExTrA T12 | ExTrA | 60 | Full | lc | This work | |
| 450 | 2024-03-08 | Euler / ECAM | NGTS | 60 | Full | lc | This work | |
| 450 | 2024-03-08 | ExTrA T12 | ExTrA | 60 | Full | lc | This work | |
| 451 | 2024-03-16 | Euler / ECAM | NGTS | [30, 35] | Full | lc | This work | |
| 451 | 2024-03-16 | ExTrA T12 | ExTrA | 60 | Partial | lc | This work | |
| 301 | 2024-03-29 | CHEOPS | CHEOPS | 60 | Intermittent | lc | This work | |
| 304 | 2024-05-04 | Euler / ECAM | NGTS | 75 | Full | lc | This work | |
| 304 | 2024-05-04 | ExTrA T23 | ExTrA | 60 | Full | lc | This work | |
| 458 | 2024-05-10 | CHEOPS | CHEOPS | 60 | Intermittent | lc | This work |
Notes. The epoch is the number of orbital periods since the first observed transit. For the TESS observations, the sector number is specified after the s. For the ExTrA observations, T stands for telescope, and the numbers following it represent the specific telescopes that observed the transit. For example, T123 means that telescopes 1, 2, and 3 all observed the transit. The Data column indicates how each transit was incorporated into the analysis of Sect. 4.2. The term 1c is used when the transit light curve was used, and tt is employed when only the transit timing determined in the literature was used.
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