Einstein Probe reveals a hidden phase of neutron star collisions
The Einstein Probe satellite has detected a previously unseen phase of a neutron star collision, revealing prolonged soft X-ray emissions. This discovery challenges existing models of short gamma-ray bursts, which were previously thought to be brief flashes.
Why it matters
This observation provides new insights into the physics of extreme cosmic events and demonstrates the capability of wide-field X-ray monitoring to capture transient phenomena.
Short gamma-ray bursts, or short GRBs, are believed to occur when two compact objects, such as neutron stars, spiral toward one another before colliding and merging. These extraordinarily violent events produce gravitational waves and rank among the most powerful explosions in the Universe.
For decades, astronomers have mainly detected these events through their gamma-ray flashes. Their earliest soft X-ray emission has been far more difficult to observe because most narrow-field X-ray telescopes depend on gamma-ray alerts to locate a burst before turning toward it. Einstein Probe's wide-field soft X-ray monitoring has now exposed this previously unseen stage, giving astronomers a direct look at the opening moments of a short GRB.
A Half-Second Flash With a Much Longer Aftermath
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