Faster WMAP 3-Year Low-ell TT Module
Jonathan Sievers and Mike Nolta
Canadian Institute for Theoretical AstrophysicsWe have sped up the low-ell TT likelihood through an eigenvalue compression by a factor of more than 10. As this is currently (as of Version v2p2) the slowest part of the code, we achieve an overall speedup in the likelihood evaluation of a factor of 4. The uncompressed and compressed likelihoods agree typically to better than 10-6, much less than the scatter in cross-platform likelihood evaluations (order 10-3).
If you haven't done so already, install the standard version of the
WMAP3 likelihood code, available from LAMBDA .