Its pretty self explanatory, but if you run into trouble let me know.
Another very useful site is the XMM-Newton LEDAS search engine. This will allow you to search through the XMM-Newton serendipitous source catalogue (2XMM) data for any detections matching with the position of your target source. You can search based on SIMBAD or NED name queries or enter the coordinates yourself. Its a little finicky with the latter, as you need to insert a comma between the RA and Dec or it crashes. The LEDAS pages include images, spectra and light curves for the sources detected, as well as a host of useful information and links to optical finding charts and SIMBAD/NED queries etc. The LEDAS search page can be found at: www.ledas.ac.uk/arnie5/arnie5.php?action=basic&catname=2xmmidr3