This is a combination of a radio map (greyscale) and an X-ray map (countours)
of the supernova remnant W44. The locations where we looked for the 63 micron
Oxygen line using the Infrared Space Observatory are shown as circles. The letters
in the circles correspond to the letters in the next figure.
These are the exciting results -- for us at least. Each of the 9 panels shows the
brightness as a function of wavelength around the wavelength where Oxygen
emits a fine-structure line, near 63 microns. The line is very faint outside the
supernova remnant, but it becomes very strong at the edge of the remnant.
Then the brightness decreases, but is still surprisingly high in the middle of
the remnant.