Leonard E Parker

Center for Gravitation, Cosmology & Astrophysics

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Leonard E Parker Center for Gravitation, Cosmology and Astrophysics

LIGO Discovers First Merger of Two Neutron Stars Seen By Astronomers Around the World

Posted by DK on October 16, 2017

The LIGO/Virgo collaboration announced the discovery of a neutron-star neutron star merger detected in gravitational waves. It ws subsequently detected across the electromagnetic spectrum by astronomers around the world.

On August 17, 2017 the Laser Interferometer Gravitational-Wave Observatory (LIGO) detected the merger of two neutron stars. Only 2s later the Fermi Gamma-ray satellite detected a burst of gamma-rays coming from the same direction on the sky. Within a day a new optical source had been detected in the galaxy NGC 4993, about 130 million light years away. It has subsequently been seen by ultraviolet, radio, infrared, and X-ray telescopes on all 7 continents and in space. This continues to be a fascinating event.

The detection of electromagnetic radiation from the GW170817 neutron star merger in ultra-violet, infrared and radio conducted by the GROWTH team. Observations were made using the Swift satellite (UV), Gemini-South Telescope (infrared) and the Very Large Array (radio). Credit: Robert Hurt (Caltech/IPAC), Mansi Kasliwal (Caltech), Gregg Hallinan (Caltech), Phil Evans (NASA) and the GROWTH collaboration
For more information see:

UWM Report article

GROWTH collaboration article

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