This false-color composite image (hi-res version) shows the remnants of Supernova SN 1604 in visible light, infrared, and x-rays. The violence of a supernova explosion typically produces a neutron star. For a rare observation of a neutron star in x-rays, see this ESA image.
Image:
image credit: NASA, ESA, R. Sankret and W. Blair; image source
