Fermi mapped GeV-gamma-ray emission regions (magenta) in the W44 supernova remnant. The features clearly align with filaments detectable in other wavelengths. This composite merges X-rays (blue) from the Germany-led ROSAT mission, infrared (red) from NASA's Spitzer Space Telescope, and radio (orange) from the Very Large Array near Socorro, N.M. Credit: NASA/DOE/Fermi LAT Collaboration, ROSAT, JPL-Caltech, and NRAO/AUI.
NASA/DOE/Fermi LAT Collaboration, ROSAT, JPL-Caltech, and NRAO/AUI
2010-02-16
NASA's Fermi Closes on Source of Cosmic Rays, url=<a rel="nofollow" class="external free" href="http://www.nasa.gov/mission_pages/GLAST/news/cosmic-rays-source.html">http://www.nasa.gov/mission_pages/GLAST/news/cosmic-rays-source.html</a>