- X-ray sources whose output of radiation increases and decreases very rapidly over a wide range, sometimes many times per day. Also known as X-ray bursters, rapid bursters are thought to give out X-ray bursts when a neutron star sweeps up a critical mass of material from a companion star. This mass collapses at once onto the star’s surface and releases its energy in a single X-ray burst. Bursters have also been detected in other frequencies than X-rays.
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