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Acknowledging the Use of HEASARC Data

If using the HEASARC service made a significant contribution to a research project, please make the following acknowledgement in any resulting publication:

"This research has made use of data and/or software provided by the High Energy Astrophysics Science Archive Research Center (HEASARC), which is a service of the Astrophysics Science Division at NASA/GSFC and the High Energy Astrophysics Division of the Smithsonian Astrophysical Observatory."