Name

       sethead - Set FITS or IRAF header keyword values

Synopsis

       sethead [-dknv][r letter] <FITS or IRAF file> kw1=val1 kw2=val2 ... kwn=valuen

Description

       Set  parameters  in  the  header  of a FITS or IRAF image.  If the keywords do not already
       exist, they are added at the end of the header.  Values are assumed to be numeric if  they
       contain no alphabetic characters and right-aligned.  Otherwise they are left-aligned after
       the equals sign, and padded by spaces to a minimum of 8 characters.  To set keywords in  a
       list  of  files,  substitute @<listfile> for the file names on the command line.  To set a
       lot of keywords, put them, one per line, in a file and substitute  @<keylistfile>  on  the
       command  line.   If two @ commands are present, the program will figure out which contains
       file names and which contains keywords.  Lines in a keyword list file which do not contain
       an = are ignored.

Options

       -h     Write  HISTORY line into output header with sethead version, current date and time,
              and names of keywords set.

       -k     Write SETHEAD keyword into output header with sethead  version,  current  date  and
              time, and names of keywords set.  If a SETHEAD keyword already exists, move the old
              value to a HISTORY line before writing the new value

       -n     Write a new file with an added "e" before the extension.

       -r letter
              Rename existing keywords whose values are being reset by prepending  the  character
              "letter".   Drop  the last character if the changed keyword is already 8 characters
              long.

       -v     Print confirmations of each parameter setting

Web Page

       http://tdc-www.harvard.edu/software/wcstools/sethead.html

Author

       Doug Mink, SAO (dmink@cfa.harvard.edu)