Table 2
Inferred parameters from the transit photometry analysis.
| Parameter | Units | Prior | Posterior median and 68.3% CI |
|---|---|---|---|
| TOI-1227 | |||
| Mean density, ρ⋆ | [g cm−3] | U (0.9,1.6) | 1.197 ± 0.063 |
| q1 ASTEP, ExTrA, TESS | U(0,1) |  |
|
| q2 ASTEP, ExTrA, TESS | U(0,1) |  |
|
| q1 g’, r’, i’ | U(0,1) |  |
|
| q2 g’, r’, i’ | U(0,1) |  |
|
| q1 z’, zs, I+z | U(0,1) |  |
|
| q2 z’, zs, I+z | U(0,1) |  |
|
| TOI-1227 b | |||
| Semi-major axis, a | [au] | 0.0942 ± 0.0053 | |
| Inclination, ip | [º] | 88.711 ± 0.036 | |
| Radius ratio, Rp/R⋆ | 0.1567 ± 0.0029 | ||
| Scaled semi-major axis, a/R⋆ | 36.18 ± 0.62 | ||
| Impact parameter, b | 0.814 ± 0.012 | ||
| Transit duration, T14 | [h] |  |
|
| Radius, Rp |  |
9.58 ± 0.55 | |
 |
0.854 ± 0.049 | ||
| r1 | U(0,1) |  |
|
| r2 | U(0.140,0.175) | 0.1567 ± 0.0029 | |
| Mid-transit times | |||
| Epoch 0 (TESS s11) | [BJDTDB] | U(2 458 617.44,2 458 617.53) | 2 458 617.4817 ± 0.0081 |
| Epoch 1 (TESS s12) | [BJDTDB] | U(2 458 644.76,2 458 644.90) | 2 458 644.830 ± 0.015 |
| Epoch 9 (SOAR i’) | [BJDTDB] | U (2 458 863.71,2 458 863.76) | 2 458 863.7372 ± 0.0028 |
| Epoch 13 (LCOGT i’) | [BJDTDB] | U(2 458 973.17,2 458 973.25) | 2 458 973.2089 ± 0.0048 |
| Epoch 16 (LCOGT r’, zs) | [BJDTDB] | U(2 459 055.230,2 459 055.309) |  |
| Epoch 25 (SOAR g’) | [BJDTDB] | U(2 459 301.48,2 459 301.65) |  |
| Epoch 26 (ASTEP, LCOGT zs) | [BJDTDB] | U(2 459 328.915,2 459 328.945) | 2 459 328 9290 ± 0 0015 |
| Epoch 27 (TESS s38) | [BJDTDB] | U(2 459 356.24,2 459 356.32) | 2 459 356.2810 ± 0.0063 |
| Epoch 28 (LCOGT g’, ExTrA T23) | [BJDTDB] | U(2 459 383.60,2 459 383.70) | 2 459 383.6550 ± 0.0041 |
| Epoch 39 (ExTrA T23, TRAPPIST-South I+z) | [BJDTDB] | U( 2459 684.58,2 459 684.615) |  |
| Epoch 40 (ExTrA T3) | [BJDTDB] | U(2 459 711.900,2 459 712.005) |  |
| Epoch 51 (ExTrA T123) | [BJDTDB] | U(2 460 012.890,2 460 012.935) | 2 460 012.9133 ± 0.0029 |
| Epoch 53 (ExTrA T123, SPECULOOS z’, TESS s64) | [BJDTDB] | U(2 460 067.63,2 460 067.65) | 2 460 067 6395 ± 0 0012 |
| Epoch 54 (ASTEP, TESS s65) | [BJDTDB] | U(2 460 094.97,2 460 095.01) | 2 460 094.9886 ± 0.0031 |
| Epoch 55 (ASTEP) | [BJDTDB] | U(2 460 122.30,2 460 122.40) |  |
| Epoch 57 (ASTEP) | [BJDTDB] | U(2 460 177.02,2 460 177.12) |  |
| Photometry | |||
| Offset relative flux | [Relative flux] | N (0,0.01) | (a) |
| Jitter | [ppm] | J(1,20 000) | (a) |
| Amplitude of the GP | [Relative flux] | J(10–6,1.0) | (a) |
| Timescale of the GP | [days] | J(0.001,10) | (a) |
Notes. Parameters without a prior are derived parameters. (a)The parameters listed for the photometry are different for each telescope and for each individual transit. The parameters q1 and q2 are the quadratic limb-darkening coefficients in the Kipping (2013) parametrization. The parameters r1 and r2 are the impact parameter and transit depth parametrized according to Espinoza (2018). IAU 2012: au = 149 597 870 700 m. IAU 2015: 
U(a, b): A uniform distribution defined between a lower a and an upper b limit. J(a, b): Jeffreys (or log-uniform) distribution defined between a lower a and upper b limit. N(µ, σ): Normal distribution prior with mean µ, and standard deviation σ.
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