*** fitsio ***
 
 FCLOSE          - close a FITS file opened with id = fOpen()
 FCLOSEW         - close a FITS file opened with id = fOpenW()
 FOPEN           - open a FITS file, returns the file identifier
 FOPENW          - open a FITS file for writing, returns the file identifier
 FREAD           - Read a row of a FITS file 
 FWRITE          - Write (portion of) a row of a FITS file 
 MKHDR           - Make a minimal primary (or IMAGE extension) FITS header
 PRINTHDR        - Print the content of a FITS header
 RDFHDR          - read a FITS header
 RDFHDR          - read a FITS header
 READFITS        - Read a FITS file into IDL data and header variables. 
 READFITS        - Read a FITS file into IDL data and header variables. 
 READFITS        - Read a FITS file into IDL data and header variables. 
 READFITS        - Read a FITS file into IDL data and header variables. 
 READFITS        - Read a FITS file into IDL data and header variables. 
 SORTHDR         - Sort a FITS  header
 SXADDPAR        - Add or modify a parameter in a FITS header array.
 SXDELPAR        - Proc. to delete a keyword parameter(s) from a FITS header
 SXPAR           - Obtain the value of a parameter in a FITS header
 WRITEFITS       - Write IDL array and header variables to a disk FITS file.