Whereas ESA’s satellite tv for pc INTEGRAL was observing the sky, it noticed a burst of gamma-rays — high-energy photons — coming from the close by galaxy M82. Just a few hours later, ESA’s XMM-Newton X-ray area telescope looked for an afterglow from the explosion however discovered none. A global staff realized that the burst will need to have been an extra-galactic flare from a magnetar, a younger neutron star with an exceptionally sturdy magnetic discipline.
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