FITS WRITE

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FITS WRITE

            LAS\FITS  WRITE  File[.fits]  /MODE  SPECTRUM|INDEX  [/BITS   Nbits]
        [/CHECK]

        WRITE  the File.fits FITS file from the CLASS Data Format. The resulting
        FITS file is a binary table (BINTABLE) with columns  of  parameters  and
        channel  intensities  (dedicated CLASS-FITS format, see CLASS documenta-
        tion for details). In order to produce a data cube, the  commands  TABLE
        and  XY_MAP  must  be used first. Then the resulting GDF cube can be ex-
        ported with the command V\FITS.

        /MODE is a mandatory option which can take the following values as argu-
        ment:
        SPECTRUM a  simple  FITS  file is written from the current R spectrum in
                 memory is written. The number of bits per intensity value  used
                 when  writing the FITS file may be controlled through the /BITS
                 optional argument. It can be: 16 or I*2 (2 bytes  integer),  32
                 or  I*4 (4 bytes integer) or -32 or R*4 (4 bytes real). Default
                 is 32.
        INDEX    a FITS BINTABLE is written from all the spectra in current  in-
                 dex. The user MUST make sure that all index spectra are consis-
                 tent (same source, same line, same frequency setup,  ...).  The
                 intensity  values  (and  irregularly  sampled X axis values, if
                 any) are always written as 4 bytes real.

        The default mode and number of bits can also be  specified  through  the
        commands:
          SET FITS MODE SPECTRUM|INDEX
          SET FITS BITS Nbits
        The option /CHECK will print the FITS HEADER on the terminal.