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Gravitational wave event likely signaled birth of black hole

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The data was taken in the days, weeks, and months after the detection of gravitational waves by the Laser Interferometer Gravitational Wave Observatory (LIGO) and gamma rays by NASA’s Fermi mission on August 17, 2017. While nearly every telescope observed this source, known officially as GW170817, X-rays from Chandra are critical for understanding what happened … Read more