NASA’s Fermi Finds New Feature in Brightest Gamma-Ray Burst Yet Seen - NASA Science
NASA’s Fermi Finds New Feature in Brightest Gamma-Ray Burst Yet Seen - NASA Science
science.nasa.gov
NASA’s Fermi Finds New Feature in Brightest Gamma-Ray Burst Yet Seen - NASA Science
"The team thinks the most likely source is the annihilation of electrons and their antimatter counterparts, positrons."
... blue shifted and mostly monochromatic.