'lcurve' is for modelling of light curves. Installation order: subs --> colly, binary --> roche --> lcurve The file called 'Lcurve' that is generated in this directory defines aliases (csh-style) and prints a help message when sourced. Installation can be painful I'm afraid, but I don't have the time to make a better job of it I am afraid. For details, please see: https://cygnus.astro.warwick.ac.uk/phsaap/software