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Table 4
Parameters of the transiting hot Saturns KOI-188b and KOI-195b and their host stars.
| KOI-188 | KOI-195 | |
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| Ephemerides and orbital parameters: | ||
| Planet orbital period P [days] | 3.79701816 ± 0.00000019 | 3.21751883 ± 0.00000019 |
| Transit epoch T0 [BJD – 2 454 900] | 66.508785 ± 0.000039 | 66.631964 ± 0.000047 |
| Orbital eccentricity e (99% upper limit) | < 0.33 | < 0.18 |
| Orbital inclination ip [°] | 87.02 ± 0.08 | 85.74 ± 0.06 |
| Transit duration T1 − 4 [h] | 2.353 ± 0.006 | 2.191 ± 0.010 |
| Impact parameter b | 0.602 ± 0.012 | 0.718 ± 0.007 |
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| Transit-related parameters: | ||
| System scale a/R⋆ | 11.60 ± 0.08 | 9.67 ± 0.06 |
| Radius ratio k = Rp/R⋆ | 0.1168 ± 0.0008 | 0.1221 ± 0.0013 |
| Linear limb-darkening coefficient ua | 0.53 ± 0.07 | 0.43 ± 0.20 |
| Quadratic limb-darkening coefficient ub | 0.15 ± 0.12 | 0.20 ± 0.27 |
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| RV-related parameters: | ||
| Semi-amplitude K [m s-1] | 34 ± 10 | 50 ± 10 |
| HARPS-N systemic radial velocity V0 [km s-1] | −45.404 ± 0.009 | −78.835 ± 0.010 |
| HARPS-N season offset δV0 [m s-1] | 29 ± 18 | 22 ± 20 |
| O-C residuals [m s-1] | 11.5 | 8.6 |
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| Data-related parameters: | ||
| Kepler season 0 contamination [%] | 4.50 ± 0.40 | 5.78 ± 0.42 |
| Kepler season 1 contamination [%] | 4.30 ± 0.43 | 5.78 ± 0.43 |
| Kepler season 2 contamination [%] | 4.42 ± 0.41 | 6.16 ± 0.45 |
| Kepler season 3 contamination [%] | 4.28 ± 0.40 | 6.48 ± 0.44 |
| Kepler season 0 jitter LC [ppm] | 121 ± 11 | 204 ± 10 |
| Kepler season 0 jitter SC [ppm] | 310 ± 46 | 66 ± 59 |
| Kepler season 1 jitter LC [ppm] | 99 ± 12 | 246 ± 9 |
| Kepler season 1 jitter SC [ppm] | 156 ± 85 | − |
| Kepler season 2 jitter LC [ppm] | 240 ± 9 | 315 ± 11 |
| Kepler season 2 jitter SC [ppm] | 36 ± 33 | 210 ± 9 |
| Kepler season 3 jitter LC [ppm] | 164 ± 10 | 237 ± 15 |
| Kepler season 3 jitter SC [ppm] | 46 ± 41 | 98 ± 69 |
| HARPS-N jitter [m s-1] | 0.014 ± 0.015 | 0.011 ± 0.015 |
| SED jitter [mag] | 0.065 ± 0.026 | 0.084 ± 0.029 |
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| Spectroscopic parameters: | ||
| Effective temperature Teff [K] | 5170 ± 70 | 5725 ± 90 |
| Metallicity [Fe/H] [dex] | 0.24 ± 0.11 | −0.21 ± 0.08 |
| Stellar rotational velocity vsini∗ [km s-1] | 3 ± 1 | 3 ± 1 |
| Spectral type | K1V | G1V |
| Stellar surface gravity log g∗ [gcm-2] | 4.50 ± 0.15 | 4.50 ± 0.15 |
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| Stellar physical parameters from combined analysis: | ||
| Stellar surface gravity log g∗ [gcm-2] | 4.535 ± 0.010 | 4.471 ± 0.011 |
| Stellar density ρ⋆ [gcm-3] | 1.448 ± 0.030 | 1.170 ± 0.023 |
| Star mass M⋆ [M⊙] | 0.93 ± 0.05 | 0.91 ± 0.06 |
| Star radius R⋆ [R⊙] | 0.86 ± 0.02 | 0.92 ± 0.02 |
| Age of the star [Gyr] | 5 ± 4 | 6 ± 4 |
| Luminosity of the star log (L/L⊙) | −0.323 ± 0.031 | −0.089 ± 0.042 |
| Distance of the system [pc] | 650 ± 20 | 880 ± 30 |
| Interstellar extinction E(B − V) [mag] | 0.024 ± 0.022 | 0.055 ± 0.030 |
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| Planetary physical parameters from combined analysis: | ||
| Orbital semi-major axis a [AU] | 0.0464 ± 0.0008 | 0.0414 ± 0.0010 |
| Planet mass Mp [MJup] | 0.25 ± 0.08 | 0.34 ± 0.08 |
| Planet radius Rp [RJup] | 0.978 ± 0.022 | 1.09 ± 0.03 |
| Planet density ρp [g cm-3] | 0.27 ± 0.07 | 0.26 ± 0.06 |
| Planetary equilibrium temperature Tp [K] | 1070 ± 15 | 1300 ± 20 |
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