XMM-Newton Science Archive (XSA)
Due to scheduled maintenance, the
XMM-Newton SOC web server
(including the Target of Opportunity alert)
will be unavailable,
from 07:30 until 15:30 (UT) on Saturday 25th April 2015.
The page you are trying to access is no longer available.
You may go to the main
XMM-Newton Science Archive page
go back to the