text: One astronomical mission designed to explicitly study this regime, ROSAT, suggested that Geminga was responsible for the gas in the Local Cavity's activity in this regime.
full_question: One astronomical mission designed to explicitly study this regime, ROSAT, suggested that Geminga was responsible for the gas in the Local Cavity's activity in this regime. In 2003, a satellite provided strong evidence that magnetars are anomalous slow- rotation pulsars which are optically active in this regime. Paraboloid and hyperboloid surfaces coated with gold and iridium are used to account for the "grazing incidence" when studying this regime. A satellite that provides images of this regime produced the first image of the supernova remnant Cassiopeia A, and the first discovered binary that is luminous in this region of the spectrum was found in Scorpius. Observational telescopes that study this radiation include XMM-NEWTON and NASA's Chandra. For 10 points, name this portion of the EM spectrum that has a higher frequency than UV rays, and lower frequency than gamma rays.
first_sentence: One astronomical mission designed to explicitly study this regime, ROSAT, suggested that Geminga was responsible for the gas in the Local Cavity's activity in this regime.
raw_answer: X-ray astronomy