Using the PROS software

The PROS software is stored under the IRAF package xray, and is divided into several subpackages ( e.g. , spectral, spatial, timing, etc.). Once the xray package is loaded all the sub-packages are accessible. To load the PROS software:

  cl > xray

         []----------------------------------------------------[]
         []          PROS Development Version 2.3.1            []
         []                December 24, 1993                   []
         []                                                    []
         []       Before using this version rerun mkiraf       [] 
         []                                                    []
         []       For problems mail rsdc@cfa.harvard.edu       []
         []----------------------------------------------------[]

    The following general information is available via the "help" command:
            help topic:     description:
 
    *****   pros   *****    description of all help options available in pros
    
    *   bugs            description of known IRAF/PROS bugs
        coords          description of IRAF coordinates used in PROS
        extensions      description of conventions for PROS file extensions
    *   explain_errors  description of PROS error computations for low
                           count/bin data
    *   explain_xdata   description of new RDF file formats
    *   explain_screen  description of PROS support for temporal screening
    *   file_compare    comparison of new/RDF formats to OLD formats in PROS
        filter          description of filtering options in PROS
        qpoe            description of QPOE data file and user interface
        regions         description of PROS region masks
        release_xray    release notes for this build
        revisions       revisions for the patch
    * - indicates new file in PROS 2.3

       xapropos    xdemo       xinstall      xobsolete.   xproto.    xspectral.
       xdataio.    ximages.    xlocal.       xplot.       xspatial.  xtiming.

xr>

After the xray package is loaded, the following IRAF logical variables are defined.

• xdata: is a directory containing Einstein and ROSAT sample x-ray data files which are available for testing the PROS tasks and their use.
• xdemo: is a directory containing demos that use the PROS software. These are useful in demonstrating the PROS software and may serve as templates for users.

IRAF uses $ as a delimiter between logical variables and physical names i.e. xdata$snr.imh addresses the image snr.imh in the directory pointed to by the IRAF variable, xdata.