However, the event was also seen by a number of other instruments, gamma ray detectors and x-ray telescopes that are much more sluggish than RAPTOR. NASA’s Fermi, NuSTAR, and Swift satellites managed to see some portion of the event as it unfolded, but most telescopes joined in to view the event’s so-called afterglow. This was an incredibly violent happening, and it threw out debris and damage over a wide radius; for several hours, that radius glowed and astronomers watched as it faded.