WMAP DR1 Temperature Correlation Function Description and Links
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/
The two-point temperature correlation function, C(θ), is estimated for the sky by computing the average product of all map temperatures with a fixed angular separation θ. The temperature correlation function presented here is computed from the WMAP Internal Linear Combination (ILC) map degraded to approximately 0.5° pixels (HEALPix Nside=128). Pixels within the Kp0 intensity mask have been excluded from the computation as a further step to reduce foreground contamination. The data file is in ASCII format, with two columns: θ, in degrees, and C(θ), in mK2. As noted in Bennett et al. (2003), the WMAP temperature correlation function exhibits very little large scale CMB anisotropy power, confirming the findings of COBE/DMR (e.g., Hinshaw et al. 1996).
More details can be found in: