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Extended downtime notice

Due to a planned outage on Friday, April 12th starting at noon through Sunday, April 14th, access to this site will be unavailable during this time. We apologize for any inconvenience.

Acknowledgments

  MAST made extensive use of the XMM-Newton web sites at HEASARC and VILSPA. All the catalog information and data sets available from MAST were provided by the HEASARC Guest Observer Facility.