2016.10.10

LIGO-detected gravitational-wave events derive from merger of black holes

The Calorimetric Electron Telescope (CALET), which was installed on the exposed facility of the Japan experiment module ‘Kibo’ of the International Space Station (ISS) in August 2015, did not observe x-rays and/or gamma rays when the United States’ Laser Interferometer Gravitational-wave Observatory (LIGO) detected gravitational waves. This confirmed the existence of not only gravitational waves from astronomical objects but also from a merger of two black holes. CALET’s observation results were published in the American Astronomical Society online journal　THE ASTRONOMICAL JOURNAL LETTERS  on September 20, 2016. The CALET Project team representative is Professor Shoji Torii from the Faculty of Science and Engineering, Waseda University. ＜More＞