Credit: NASA/DOE/Fermi LAT Collaboration. › Larger animated image
The jets bore all the way through the collapsing star and continue into space, where they interact with gas previously shed by the star and generate bright afterglows that fade with time.
If the GRB is near enough, astronomers usually discover a supernova at the site a week or so after the outburst.
"This GRB is in the closest 5 percent of bursts, so the big push now is to find an emerging supernova, which accompanies nearly all long GRBs at this distance," said Goddard's Neil Gehrels, principal investigator for Swift.
Ground-based observatories are monitoring the location of GRB 130427A and expect to find an underlying supernova by midmonth.
› Download additional graphics from NASA Goddard's Scientific Visualization Studio
› Archive of GRB notices from the Gamma-ray Coordination Network
› "NASA's Fermi Telescope Sees Most Extreme Gamma-ray Blast Yet" (02.19.09)
› NASA's Fermi Gamma-ray Space Telescope
› NASA's Swift mission
NASA's Goddard Space Flight Center, Greenbelt, Md.