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Computing exoplanets parameters from transit light curve
Using a simple geometric model, we can compute two parameters from a single light curve of exoplanet transit, Rp - planet radius and inclination angle i.
Planet radius can be directly computed from depth of the transit. Inclination angle can be computed from length of the transit along with catalogue parameters Rs - star's radius, a - semi major axis and orbital period P. For detailed description and equations see:
 Parameters of transiting exoplanet system
Uncertainities of Rp and i values
- Uncertainity of planet radius is computed from errors of derived depth of the transit. The error is first added to the derived depth and than deducted. In such way, we obtain the resulted error bars of Rp.
- Uncertainity of inclination angle is computed twice.
A) Uncertainity is computed just from errors of derived length of transit and planet radius (Rs and a are fixed) - dashed lines in the picture.
B) Uncertainity is computed with uncertainities of catalogue values of Rs and a - grey area in the picture.
Errors are added / deducted to the equation (5) so that we obtain maximal error bars.
Please note, that errors of star's radius and semi major axis can be dominant source of resulted uncertainity of the inclination angle.
B A C K
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New data MEDUZA & HERO:
CCD: M. Lehký: SN2004et Cyg, SN2003gd Psc, SN2002ap Psc, SN2001bg Cnc, DX And, YY Her, V 1329 Cyg, V 2274 Cyg, V 1548 Aql, V 445 Pup,
VIZ: J. Speil: CQ And, QR And, RX And, SX And, UW And, UX And, VX And, Z And, SS Aur, RX Boo, R Cam, X Cam, Z Cam, AA Cas, EQ Cas, R Cas, T Cep, X Cep, OMI Cet, T CrB,
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