Astronomers have confirmed that an object they thought was a distant galaxy is actually the brightest extra-galactic pulsar ever seen.
The team made the discovery using a technique that blocks a particular type of polarized light, similar to polarized sunglasses, which could be used to spy more ‘hidden’ pulsars.
Wang and the team say the pulsar is ten times brighter than any other pulsar found outside the Milky Way. Their study is published in The Astrophysical Journal today. Wang and an international team of astronomers first suspected the object might be a pulsar in data from the Variables and Slow Transients survey, conducted using the Australian Square Kilometre Array Pathfinder telescope in Western Australia. The survey looks at a large amount of sky for highly variable radio wave sources, and collects circular polarization, among other data.
“We should expect to find more pulsars using this technique. This is the first time we have been able to search for a pulsar’s polarization in a systematic and routine way,” said Murphy.
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