To run the XSA as a Desktop Application you must have Java Web Start installed on your computer.
The Java Web Start software is a component of the Java Runtime Environment (JRE), which may be downloaded here
For more details see XSA FAQ.
Alternatively, you can access the XSA through the user interface:
To use the XSA Archive through a web browser it must be Java compliant,
if not please install the latest Java2 following the instructions provided here.
If you still have problems, go to the XSA FAQ.
Please check the FULL LIST of options for accessing
the XSA interface.
To access the XSA data directly through the Archive InterOperability System (AIO) please use:
Alongside all XMM-Newton scientific data products and observation-related information, three high-level catalogues or
multiwavelength datasets can be accessed through the
XSA user interface or downloaded from the links below:
the 2XMMi-DR3 Serendipitous EPIC Source Catalogue, the XMM-OM Serendipitous Ultra-violet Source Survey Catalogue,
the Slew Survey EPIC Source Catalogue and the XID program WFC/INT images.