Integral

Integral, European Space Agency–Russian–U.S. satellite observatory designed to study gamma rays emitted from astronomical objects. Integral was launched by Russia from the Baikonur Cosmodrome in Kazakhstan on October 17, 2002. It carried a gamma-ray imager and spectrometer to study the most-energetic events in the universe; an onboard X-ray monitor and an optical camera were used to provide precise locations of the sources discovered by the gamma-ray instruments. It mapped the sky in the 511-kiloelectron-volt emission...