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link to STScI page


STScI will be down completely for electrical work from 2:00 PM Friday, 2 December – 6:00 AM Monday, 5 December, 2016. Mail will be queued and delivered after the work is completed, but there may be a delay. DADS and data processing won't be up until some time Monday morning. Our apologies for the inconvenience.

Please take a very short 6 question survey found on the front page of the MAST Discovery Portal.

XMM-OM Related Sites

The XMM Optical data is being made available as part of a cooperative effort with HEASARC.


  • The XMM-Newton Science Operations Centre (ESA)

  • The XMM-Newton Guest Observer Facility at NASA/GSFC

  • Other related links