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on october 16 2017

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astronomers excitedly reported the first

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detection of electromagnetic waves or

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light from a gravitational wave source

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now a year later

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researchers are announcing the existence

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of a cosmic relative to that historic

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event

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the discovery was made using data from a

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host of telescopes including nasa's

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chandra x-ray observatory

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the object of the new study called

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was first reported as a gamma-ray burst

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detected by fermi in january 2015.

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this detection and follow-up

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observations show that this new object

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shares remarkable similarities to the

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neutron star merger and gravitational

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wave source discovered by the advanced

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laser interferometer gravitational wave

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observatory

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and its european counterpart virgo in

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2017

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the latest study concludes that these

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two separate objects may in fact be

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related

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the researchers think both grb 150 101b

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and

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gw170817 were most likely produced by

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the same type of event

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the merger of two neutron stars

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this is a catastrophic collision that

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generated a narrow jet or beam of high

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energy particles

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the jet produced a short intense burst

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of gamma rays

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a high energy flash that can last only

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seconds

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this was followed by an afterglow in

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optical light that lasted a few days

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an x-ray emission that lasted much

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longer

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scientists think both of these events

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involved kilonovas

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that is powerful explosions that release

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large amounts of energy and can produce

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elements like gold platinum and uranium

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understanding these explosions helps

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astronomers trace our cosmic ancestry

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there is still a lot to learn about

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these events

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but chandra is poised to help in this

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new era of combined gravitational wave

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and electromagnetic investigations