healpy.sphtfunc.alm2map_der1¶
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healpy.sphtfunc.
alm2map_der1
(alm, nside, lmax=None, mmax=None)¶ Computes an Healpix map and its first derivatives given the alm.
The alm are given as a complex array. You can specify lmax and mmax, or they will be computed from array size (assuming lmax==mmax).
Parameters: alm : array, complex
A complex array of alm. Size must be of the form mmax(lmax-mmax+1)/2+lmax
nside : int
The nside of the output map.
lmax : None or int, optional
Explicitly define lmax (needed if mmax!=lmax)
mmax : None or int, optional
Explicitly define mmax (needed if mmax!=lmax)
Returns: m, d_theta, d_phi : tuple of arrays
The maps correponding to alm, and its derivatives with respect to theta and phi. d_phi is already divided by sin(theta)