deletions | additions       diff --git a/Physical parameters.tex b/Physical parameters.tex  index cdaead4..570a82b 100644  --- a/Physical parameters.tex  +++ b/Physical parameters.tex 
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\begin{eqnarray}  \chi^2 & = &  \sum_i \frac{ (f_{\rm{mod}}(\phi_i; \ {\bf a}) - f_{\rm{obs}}(\rm{\it{Kepler}}))^2 }{\sigma_i^2(\rm{\it{Kepler}})} \nonumber \\  & + & \sum_i \frac{ (f_{\rm{mod}}(\phi_i; \ {\bf a}) - f_{\rm{obs}}(\rm{RV_1}))^2 }{\sigma_i^2(\rm{RV_1})}\nonumber  \\ & + & \sum_i \frac{(f_{\rm{mod}}(\phi_i; \ {\bf a}) - f_{\rm{obs}}(\rm{RV_2}))^2}{\sigma_i^2(\rm{RV_2})}, \nonumber  \end{eqnarray}  where $f_{\rm{mod}}(\phi_i; \ {\bf a})$ is the ELC model flux at a given phase $\phi_i$ for a set of parameters ${\bf a}$, $f_{\rm{obs}}$ is the observed value at the same phase, and $\sigma_i$ is the associated uncertainty. 
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