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26-07-2014, 12:43 AM
ericwbenson
(Eric)
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Join Date: Sep 2009
Location: Adelaide, Australia
Posts: 209
Hi,
I overlaid ROSAT data once, which are contours in keV, see here, down near the bottom:
http://www.faintgalaxy.com/ngc4651.htm
But xray data is only rarely associated with bright optical sources and mostly they are galaxy cores.
Best,
EB
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