deletions | additions       diff --git a/preprocessing.tex b/preprocessing.tex  index 1cf3487..d7cd09c 100644  --- a/preprocessing.tex  +++ b/preprocessing.tex 
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\verb|b_ifuyyyymmdd_hhmmss.fits| which has been debiased and degained.  \subsection{Preprocess -- Cosmic Ray Rejection}  Cosmic ray rejection is handled by PyCosmic (see \cite{http://arxiv.org/abs/1208.1696}). It requires the input be debiased and in units of $e-$. $e^-$.  \subsubsection{Input}  A single data frame is taken (e.g., \verb|b_ifuyyyymmdd_hhmmss.fits|) and PyCosmic works its magic given a variety of parameters (not described here).