... cluster

Based on observations with the Chandra X-ray observatory, the Calar Alto 3.5 m telescope and the IRAM Plateau de Bure Interferometer. Chandra is operated by the NASA and the CXC, Calar Alto by the Max-Planck-Institut for Astronomy in Heidelberg, jointly with the Spanish National Commission for Astronomy, and IRAM is supported by INSU/CNRS (France, MPG (Germany), and IGN (Spain).

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... center

http://asc.harvard.edu/ciao/download.html

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... (2MASS

For details see the 2MASS web-site at
http://www.ipac.caltech.edu/2mass/releases/docs.html

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... 4 keV

See Chandra Proposers' Observatory Guide, 2000,
http://cxc.harvard.edu

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... tool

http://asc.harvard.edu/toolkit/pimms.jsp

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