Download
Download fitlc here: http://astro.ufl.edu/~cmancone/tars/fitlc_source.tar.gz
About
Fitlc is based largely off the light curve fitting routines written by Andy Layden. Fitlc follows the same basic principles but can use amoeba or pikaia for optimization, it can simultaneously fit multiple filters, and has simulations to quantify period errors. The basic idea is to fit a variety of templates to a raw RR Lyrae light curve. Each template is fit over a grid of inital periods using a multi-dimensional chi-sq minimzation function (pikaia or amoeba) to calculate the best fitting combination of amplitude, mean magnitude, and epoch for a given template with a given period.
I tried my best to make fitlc a useful piece of software, so as it turns out there's a lot you can do with it. To facilitate its use I put together a manual. On the right you'll find links to use to navigate the online manual.