Files are stored in FITS format. Each simulation consists of three files. The spherical harmonic coefficients are provided in dimensionless units, i.e., dT/T.
You may want to use the FITS2ALMS routine of the HEALPix software package to load the Gaussian (alm_l_XXXX_v3.fits) and the associated non-Gaussian (alm_nl_XXXX_v3.fits) part of the simulations.
To generate a CMB map containing non-Gaussianity of local type,
compute alm = alm_l + f_NL * alm_nl, where
f_NL can be any desired
level of non-Gaussianity.
Finally, we also provide the power spectrum in dimensionless units (cl_wmap5_bao_sn.dat), containing, in this order, l, ClTT, ClEE, and ClTE.
We used the WMAP5+BAO+SN cosmological data provided by LAMBDA:
| ΩL | 0.721 |
| ΩC h2 | 0.1143 |
| ΩB h2 | 0.02256 |
| h | 0.701 |
| ns | 0.96 |
| τ | 0.084 |
| scalar amplitude | 2.457e-9 |