"This is the region where the detector on NASA's orbiting Compton Gamma Ray Observatory makes observations. "Just why Markarian 421 radiates in this unusual manner is a question scientists are very ...

in 1992 at the Smithsonian's Whipple Observatory in southern Arizona. This source had been detected earlier by NASA's Compton Gamma Ray Observatory. The gamma-ray telescopes on the Compton Observatory ...

It would take another two decades and contributions from the Italian Space Agency's BeppoSax and NASA's Compton Gamma-Ray Observatory to show that these outbursts occur far beyond our Milky Way ...

As a result, they detected increased gamma-ray activity from this source ... can be interpreted as an outburst of synchrotron self-Compton (SSC) radiation. Such an outburst is likely associated ...