Image 4: Three groups of regions
Group 1 is shown in green, Group 2 in red, and Group 3 in white.
![[Image 4: Three groups of regions]](4.gif)
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The Chandra X-Ray
Center (CXC) is operated for NASA by the Smithsonian Astrophysical Observatory. 60 Garden Street, Cambridge, MA 02138 USA. Email: cxcweb@head.cfa.harvard.edu Smithsonian Institution, Copyright © 1998-2004. All rights reserved. |