This IDL facility writes out a HEALPix map into a FITS file according to
the HEALPix convention. It can also write an arbitray data set into a FITS
Location in HEALPix directory tree:
WRITE_FITS_SB , File, Prim_Stc [, Xten_stc, Coordsys=, /Nested, /Ring,
Ordering=, /Partial, Nside=, Extension=, /Nothealpix]
- name of a FITS file in which the map is to be written
- IDL structure containing the following fields:
- primary header
- primary image
Set it to 0 to get an empty primary unit
IDL structure containing the following fields:
- extension header
- data column 1
- data column 2
NB: because of some astron routines limitation, avoid using the single letters
'T' or 'F' as tagnames in the structures Prim_stc and Xten_stc.
if set to either 'C', 'E' or 'G', specifies that the
Healpix coordinate system is respectively Celestial=equatorial,
Ecliptic or Galactic.
(The relevant keyword is then added/updated in the extension
header, but the map is NOT rotated)
if set to either 'ring' or 'nested' (case un-sensitive),
specifies that the map is respectively in RING or NESTED
see also:Nested and Ring
scalar integer, HEALPix resolution parameter of the
data set. Must be used when the data set does not
cover the whole sky
scalar integer, extension in which to write the data
if set, specifies that the map is in the NESTED ordering
see also:Ordering and Ring
if set, specifies that the map is in the RING ordering
see also:Ordering and Nested
if set, the data set does not cover the whole sky. In
that case the information on the actual map resolution should be given by the
qualifier Nside (see above), or included in the FITS header enclosed in
if set, the data set can be arbitrary, and the
restriction on the number of pixels do not apply. The keywords Ordering, Nside, Nested, Ring and Partial are ignored.
This section lists the routines related to write_fits_sb
- version 6.1 or more is necessary to run write_fits_sb
- This HEALPix IDL facility can be used to read in maps
written by write_fits_sb.
- This HEALPix IDL facility can be used to read
into an IDL structure maps written by write_fits_sb.
- This IDL routine (included in HEALPix package) can be used to update
or add FITS keywords to the header in Prim_stc and Exten_stc
- HEALPix IDL routines to write cut-sky maps, full-sky maps, polarized full-sky maps and
arbitrary data sets into FITS files
- This HEALPix IDL facility based on write_fits_sb is designed to write
temperature+polarization (T,Q,U) maps
The structure map_FN is defined to contain a fictitious Flux+number map, where
one field is a float and the other an integer.
write_fits_sb writes out the contents of map_FN into the extension
of the FITS file 'map_fluxnumber.fits'.