Xselect provides the facility to view the image (and to smooth it), the spectrum and the light curve output by the EXTRACT command, as well at to bin up and view the MKF parameters. Two of the plot commands, plot image and plot curve allow the graphical entry of selections.
The image most recently produced by the EXTRACT command can be viewed with the command
xsel > plot image
This spawns an SAOImage session, and the user can select regions and write out the region description files. When we learn how to make Xselect talk with SAOImage, we will keep one SAOImage session open for the rest of the Xselect session, but for now, you will start up a new session with each plot image command.
If you want to smooth the image before viewing, use the SMOOTH command. Currently there are BOXCAR, GAUSSIAN and LORENTZIAN smoothing methods available.
The light curve most recently produced can be viewed with the command
xsel > plot curve
This command also provides a mouse driven way to enter timing selections.
You can plot the spectrum with
xsel > plot spectrum
Also, to aid in the SELECT MKF command, the columns in the MKF file can be plotted. This must be done in two steps, first bin them (more than one parameter can be binned at a time) using
xsel > mkfbin
Then you plot the parameters with the command
xsel > plot mkf
Again, you can see more than 1 parameter per plot.