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 five year TT power spectrum is produced by combining the Maximum Likelihood estimated spectrum from l = 232 with the pseudoC_{l} based crosspower spectra for l > 32. 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 435 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 ASCII file with the following columns:
Change NotesVersion 3.0 (5 March 2008)  WMAP five year data release.
Version 3.1 (8 July 2008)  Corrected the data in column 4 to give the portion of the error attributable to measurement error. v3.0 was giving "SN+NN" while the corrected v3.1 gives "2SN+NN". Additional Information
