p, number of fitted parameters

[Fred]

Hello Karen

In the article http://arxiv.org/pdf/1701.04817v1 where you and your team present AIJ, you invoke p, the number of fitted parameters.
I wonder if p = 6 parameters : R_p/R*, a/R*, T_C, b, u_1 and u_2

I also wonder if the algorithm uses the \chi² in a probabilistic way to compute a p-value, or only to perform the downhill method.

Kind regards

Fred

[karenacollins]

If all transit model parameters are enabled for fitting and no detrending is enabled, the number of fitted parameters is 7 (the ones you list plus baseline flux). For every transit model parameter that is fixed/locked, subtract 1. For every detrend parameter included, add 1. Chi2 is used as part of the NelderMeade method (sometimes referred to as downhill simplex or Amoeba) to select the "best fit" transit model. We do not current implement MCMC fitting.

Karen

[Fred]

Thank you Karen