XMM-Newton X-Ray Data onto an Optical View of the Andromeda Galaxy (IMAGE)
Caption
This image composites XMM-Newton X-ray data onto an optical view of the Andromeda galaxy; the ULX is circled. Colors in the XMM image correspond to different X-ray energies: 0.2 to 1 keV (red), 1 to 2 keV (green) and 2 to 4.5 keV (blue).
Credit
Background: Bill Schoening, Vanessa Harvey/REU program/NOAO/AURA/NSF; Inset: ESA/M. Middleton et al.
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