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gaussbeam
This routine generates the beam window function in multipole space of a
gaussian beam parametrized by its FWHM. The
polarization beam is also provided assuming a perfectly
co-polarized beam (eg, Challinor et al 2000, astro-ph/0008228)
Location in HEALPix directory tree:
src/f90/mod/alm_tools.f90
FORMAT call gaussbeam(
fwhm_arcmin, lmax, beam
)
ARGUMENTS
| name & dimensionality |
kind |
in/out |
description |
|---|
| |
|
|
|
|
fwhm_arcmin |
DP |
IN |
FWHM of the gaussian beam in arcminutes. |
| lmax |
I4B |
IN |
maximum l value of the window function. |
| beam(0:lmax,1:p) |
DP |
OUT |
beam window function generated. The second index runs form 1:1 for temperature only, and 1:3 for polarisation. In the latter case, 1=T, 2=E, 3=B. |
EXAMPLE:
call gaussbeam(5.0_dp, 1024, beam)
Generates the window function of a gaussian beam of FWHM = 5 arcmin, for  .
RELATED ROUTINESThis section lists the routines related to gaussbeam
-
generate_beam
- Routine returning a beam
window function.
-
pixel_window
- Routine returning a pixel
window function.
Eric Hivon
2010-06-18
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