Wilkinson Microwave Anisotropy Probe
The data made available through this page has been updated. The most recent version of this data may be accessed through /product/map/current/
MCMC Foreground Maps
HEALPix, nested, res 6 (Nside=64)
These maps were generated from the MCMC fit described in Gold, et.al.. The inputs are the one degree smoothed maps per frequency band, binned to Nside=64. There is an MCMC chain for each pixel which is used to estimate the likelihood for all the parameters. The maps provided for each parameter are:
Three sets of maps are provided: a "base" model, a shifted spinning dust model, and a steepening synchrotron model. Each model has a slightly different set of parameters that are allowed to vary.
The following parameters are allowed to vary when performing the fit at each pixel:
Temperatures in mK are in antenna units except for the CMB maps, which are provided in thermodymanic units.
The reduced χ2 are the best-fit χ2 divided by the number of degrees of freedom determined from the chain using the "effective complexity".