Radial velocity amplitudes (K1) and systemic velocities (γ) of KOI-74, measured from ISIS/WHT and HERMES/Mercator spectra. The uncertainties that are given are scaled to get a unit χ2 per degree of freedom. Initial reduced χ2 is given in the last column. Two techniques have been used: a Gaussian fit to the Mg ii line at 4481 Å and a Gaussian fit to the mean profile of the Balmer lines at 4102, 4340 and 4861 Å (see text for details).
Instrument | Lines | K1 (km s−1) | γ (km s−1) | ![]() |
ISIS | Balmer | 15.8 ± 0.4 | −50.9 ± 0.3 | 1.2 |
Mg ii | 15.4 ± 0.7 | −49.3 ± 0.5 | 1.6 | |
HERMES | Balmer | 14.9 ± 0.4 | −47.1 ± 0.3 | 0.5 |
Mg ii | 16.5 ± 1.3 | −51.0 ± 1.0 | 2.3 | |
Weighted mean (adopted) | 15.4 ± 0.3 | −49.1 ± 0.2 |
Instrument | Lines | K1 (km s−1) | γ (km s−1) | ![]() |
ISIS | Balmer | 15.8 ± 0.4 | −50.9 ± 0.3 | 1.2 |
Mg ii | 15.4 ± 0.7 | −49.3 ± 0.5 | 1.6 | |
HERMES | Balmer | 14.9 ± 0.4 | −47.1 ± 0.3 | 0.5 |
Mg ii | 16.5 ± 1.3 | −51.0 ± 1.0 | 2.3 | |
Weighted mean (adopted) | 15.4 ± 0.3 | −49.1 ± 0.2 |
Radial velocity amplitudes (K1) and systemic velocities (γ) of KOI-74, measured from ISIS/WHT and HERMES/Mercator spectra. The uncertainties that are given are scaled to get a unit χ2 per degree of freedom. Initial reduced χ2 is given in the last column. Two techniques have been used: a Gaussian fit to the Mg ii line at 4481 Å and a Gaussian fit to the mean profile of the Balmer lines at 4102, 4340 and 4861 Å (see text for details).
Instrument | Lines | K1 (km s−1) | γ (km s−1) | ![]() |
ISIS | Balmer | 15.8 ± 0.4 | −50.9 ± 0.3 | 1.2 |
Mg ii | 15.4 ± 0.7 | −49.3 ± 0.5 | 1.6 | |
HERMES | Balmer | 14.9 ± 0.4 | −47.1 ± 0.3 | 0.5 |
Mg ii | 16.5 ± 1.3 | −51.0 ± 1.0 | 2.3 | |
Weighted mean (adopted) | 15.4 ± 0.3 | −49.1 ± 0.2 |
Instrument | Lines | K1 (km s−1) | γ (km s−1) | ![]() |
ISIS | Balmer | 15.8 ± 0.4 | −50.9 ± 0.3 | 1.2 |
Mg ii | 15.4 ± 0.7 | −49.3 ± 0.5 | 1.6 | |
HERMES | Balmer | 14.9 ± 0.4 | −47.1 ± 0.3 | 0.5 |
Mg ii | 16.5 ± 1.3 | −51.0 ± 1.0 | 2.3 | |
Weighted mean (adopted) | 15.4 ± 0.3 | −49.1 ± 0.2 |
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