WMAP 
Wilkinson Microwave Anisotropy ProbeThe data made available through this page has been updated. The most recent version of this data may be accessed through /product/map/current/ The 3yr TT power spectrum is produced by combining the Maximum Likelihood estimated spectrum from l = 210 with the pseudoC_{l} based crosspower spectra for l > 10. The pseudoC_{l} estimate uses only V and Wband data, with a uniform pixel weight applied for l<= 500 and "Nobs' weights for l > 500. A total of 153 individual crosspower spectra are formed from the three individual years of data and six V and Wband differencing assemblies. The complete (unbinned) TT power spectrum data are provided as an ASCII table containing the following columns:
The diagonal elements provide an estimate of the error, but should not be used as exact error bars. The complete Fisher matrix should be used for that purpose. A binned version of the power spectrum is also available, in a separate file whose format and content are similar to those described above for the unbinned data. The choice of l bins is the same as that used in e.g., Figure 16 of Hinshaw et al. (see below). Additional Information
