The "y_theta_NNN.fits" maps are maps of the Compton y parameter from the SZ effect for \sigma_8 = 0.825 using fiducial gas physics. The maps are 3x3 degrees in size, with 600x600 pixels, and are in FITS format. Their creation is described in Peel et al. (2009); they can be converted to a given frequency using equation 13 in that paper, and can be scaled to other values of \sigma_8 (such that the power spectra agree) using sigma_8^(7/2).
Download here (tar.gz format) (Warning: 2.25 GB!)
Reference:
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Copyright (©) 2009, Michael Peel, Richard Battye, Scott Kay, University of Manchester.