|
Home > Group > Tim Naylor > tau-squared
tau-squared Fitting![]() In Naylor and Jeffries (2006) we introduced a new maximum likelihood statistic, tau-squared. Although its clear this can have widespread applications, for the moment we are concentrating on developing it to fit colour-magnitude diagrams. The technique is described in that paper, though there are some improvements we have made since which can only be cited as Naylor et al (in prep). You can see our applications of it in Jeffries et al (2007) and Mayne & Naylor (2008) and how another group have used it in Joshi et al (2008). Our aim here is to provide the where-with-all for you to fit data. The software is still being developed, so you may well find you cannot just pick it up and use it on your favourite dataset. But we hope to provide you with enough that given a little thought, you can carry out fits with relatively little effort. In that spirit, therefore, we provide software that you can download, a user manual, and some worked examples. Equally importantly, though, we provide the Fortran code, so you can change the software to achieve your aims. The software is not yet user friendly, and watch it like a hawk if you move away from the (well trodden) path of particular parameters and isochrones Rob and I have used. On the other hand, I'm happy to help, and welcome suggestions (especially in the form of revised code). Watch out for pitfalls on the hints and tips pages, and if you start using the software, drop me your e-mail address and I'll undertake to keep you informed of developments. So, you should first go to the downloads section, install the software, and then try the examples. Tim Naylor (timn[@]astro.ex.ac.uk)
Home > Group > Tim Naylor > tau-squared |