Wilkinson Microwave Anisotropy Probe DR4
The data made available through this page has been updated. The most recent version of this data may be accessed through https://lambda.gsfc.nasa.gov/product/wmap/current/"
DR4 TT Power Spectra (includes binned versions)
The seven 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.
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 4.0 (January 2010) - WMAP seven year data release.