gaussbeam
gaussbeam computes the l space window function of a gaussian beam of FWHM Fwhm. For a sky of underlying power spectrum C(l ) observed with beam of given FWHM, the measured power spectrum will be C(l )meas = C(l )B(l )2 where B(l ) is given by gaussbeam(Fwhm,Lmax). The polarization beam is also provided (when Dim > 1) assuming a perfectly co-polarized beam (eg, Challinor et al 2000, astro-ph/0008228)
beam = gaussbeam(5.,1200) |
beam contains the window function in {0,...,1200} of a gaussian beam of fwhm 5 arcmin
Eric Hivon 2003-02-07