Table 2
List of the gravity-darkening coefficients (GDC) for WASP-18.
| Instrument passband | GDC y |
|---|---|
| CHEOPS | 0.296 ± 0.009 |
| TESS | 0.230 ± 0.013 |
| Spitzer/IRAC/Channel 1 | 0.081 ± 0.004 |
| Spitzer/IRAC/Channel 2 | 0.093 ± 0.009 |
| Spitzer/IRAC/Channel 3 | 0.086 ± 0.006 |
| Spitzer/IRAC/Channel 4 | 0.078 ± 0.004 |
Notes. The GDC value of CHEOPS was validated against the value for the passband of Gaia, which is very similar to that of CHEOPS (Deline et al. 2020). Using tabulated values of Claret (2019), we computed y = 0.282 ± 0.016, which is fully consistent with our CHEOPS value.
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