% @(#)ql_irac.hlq	17.1.1.1 (ESO-USG) 01/25/02 17:52:32   
%++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
%.COPYRIGHT  (c) 1995 European Southern Observatory
%.IDENT      ql_irac.hlq
%.AUTHOR     Chris Lidman, ESO
%.KEYWORDS   MIDAS, help files, IRAC2 context
%.PURPOSE    On-line help file for the command: QL/IRAC2
%.VERSION    951029 CEL Created
%.VERSION    951112 RHW Improved text
%----------------------------------------------------------------
\se
SECTION./IRAC2
\es\co
QL/IRAC2                                                        1-Nov-1995 CEL
\oc\su
QL/IRAC2 image1 image2 [outimage]
         Subtracts one IRAC2 image from another taking into account the 
         detector integration times.
\us\pu
Purpose:    
         Subtracts one IRAC2 image from another taking into account the 
         detector integration times.
\up\sy
Syntax:     
         QL/IRAC2 image1 image2 [outimage]
\ys\pa
         image1 =   image name or number of the first image
\ap\pa
         image2 =   image name or number of the second image
\ap\pa
         outimage = output image name. Default name is "out"
\ap\no
Note:   
         The command first checks the first two parameters for numerical 
         input. If the inputs are numbers the commands appends these 
         numbers to the fixed prefix to obtain the regular images names. 
         In this case the prefix for the filenames are suppose to be
         corrected. They are "soft-wired" into the software.\\
         Currently the prefix is "cd".  
\\
         The second input possibily is to use regular image names straight
         away.          
\on\exs
Examples:
\ex 
         QL/IRAC2 3 5 3min5
         Append the number 3 and 5 to the prefix to obtain the image names
         cd0003 and cd0005. Normalize these frames by their DITs, and subtract
         the normalized image ccd0005 from the normalized image cd0003. The 
         output image will be "3min5".
\xe\sxe