GLEAM-X J162759.5−523504.3 is a transient astronomical radio source, found in 2020, in archival data recorded in 2018 by the GLEAM survey of the Murchison Widefield Array.

The source was active in radio for about 1 minute every 18 minutes, from January to March 2018, but has not been recorded since.

Nature of source It seems somewhat like a Galactic Center radio transient (GCRT) except it is thought to be only about distant.

The radio emissions were polarised (as if affected by a magnetic field) so it may be a predicted astrophysical object called an "ultra-long period magnetar".

See also GPM J1839−10 GCRT J1745−3009 PSR J0901–4046 Rotating radio transient Long Period Radio Transients

Further reading Not open access.

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