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/
TT Power Spectra (includes binned versions)
The five year TT power spectrum is produced by combining the Maximum Likelihood estimated spectrum from l = 2-32 with the pseudo-Cl based cross-power spectra for l > 32. The pseudo-Cl estimate uses only V- and W-band data, with a uniform pixel weight applied for l ≤ 500 and "Nobs' weights for l > 500. A total of 435 individual cross-power spectra are formed from the three individual years of data and six V- and W-band 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:
Version 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".