... observations

This work is based on observations made with the XMM-Newton, an ESA science mission with instruments and contributions directly funded by ESA member states and the USA (NASA).

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...

Table A.1 and Figs. B1-B7 are only available in electronic form at http://www.aanda.org

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... (ODRPACK 2.01

http://www.netlib.org/odrpack/ and references here.

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... band

The 2-7 keV band is sensitive to the determination of the temperatures for massive clusters which have cluster temperatures higher than 3 keV.

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... assuming

Note this assumption was used only in the calculation for $L_{\rm bol}^{\rm corr}$, not for any other quantity.

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... SDSS

http://cas.sdss.org/dr4/en/tools/explore/obj.asp

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