sethead(1)						      General Commands Manual							sethead(1)

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.  Val-
       ues 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  key-
	      word 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)

6 July 2001							     WCSTools								sethead(1)