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Description
cl2map synthesizes CMB temperature maps
from spherical harmonic coefficients .

(3) 
Inversely,
cl2map
can decompose an input CMB temperature map into its spherical harmonic
coefficients and/or power spectrum:

(4) 

(5) 
where K. If necessary, dipole can be calculated and included.
To synthesize a map,
cl2map
can process an file either in FITS Binary Extensionlike or in
ASCII format, or can process ASCII strings.
If the input is a power spectrum or ,
cl2map
generates a Gaussian map of CMB anisotropies by assigning
the = COMPLEX(, ) mutually independent
Gaussiandistributed real () and imaginary part (),
both with a standard deviation
at each harmonic.
To decompose an input map for its coefficients,
cl2map processes the FITS Binary map with position
and temperature
with 3 sections:

, the centerposition of the rings as a function of
the polar angle (nx positions),
 nx numbers with the number of pixels, nphi, in the corresponding
ring,

organized in one row using Point 1 as the major index
and Point 2 as the minor index.
Examples
 Synthesizing a map from given spherical harmonic coefficients:

cl2map falm alm.fits o map.fits nx 250 np 500 lmax 100
synthesizes the map from input FITS file '
alm.fits'
and outputs to the
file '
map.fits' with resolution (250,500).
The maximum multipole
number is 100.

cl2map alm "2,1,1,0" o map.y21.fits nx 100 np 200 lmax 4
synthesizes a map from the string '
"2,1,1,0"'
( )and outputs to the
file '
map.y21.fits'.
The resolution of the map is (100,200). The maximum multipole number
is 4.

cl2map falm alm.txt dipole o map.dipole.fits nx 50 np 100 lmax 10
synthesizes the dipole map from the input ASCII file
'
alm.txt' and
outputs to the file '
map.dipole.fits'.
The resolution of this dipole
map is (50, 100).

cl2map falm alm.fits di+ o map.dip.fits lmax 50
synthesizes the map (up to including the dipole)
from the input FITS file '
alm.fits' and
outputs to the file '
map.dip.fits'.
The resolution of the map is the
default value, i.e. (201,402).

cl2map falm alm.fits lmin 5 lmax 5 o map.fits
synthesizes the map for from the input FITS file
'
alm.fits' and
outputs to the file '
map.fits'.
The resolution is the default value (201,402).

cl2map falm alm.fits mmin 2 mmax 10 nx 400 np 800 o map.fits lmax 50
synthesizes the map up to for all from 2 to 10 from the input
FITS file '
alm.fits' and outputs
to the file '
map.fits'. The resolution is (400,800).
 Gaussian random map simulation from a given angular power
spectrum:
 Map decomposition for its angular power spectrum and/or spherical harmonic coefficients:
Next: difalm
Up: GLESP Description and Examples
Previous: alm2dl
Verkhodanov Oleg
20090401