https://www.wired.com/story/astronomers-track-a-fast-radio-burst-to-its-source-a-magnetar/

In the morning of April 28, a newly built radio telescope was monitoring the quiet skies over British Columbia when it caught the flash that would change everything. One of the telescope’s duties was to search for fast radio bursts—millisecond-long blips that, until then, had always come from distant galaxies. No one knew for sure what could create such short explosions of radio waves, making fast radio bursts one of the most intriguing puzzles in astrophysics.

Original story reprinted with permission from Quanta Magazine, an editorially independent publication of the Simons Foundation whose mission is to enhance public understanding of science by covering research develop­ments and trends in mathe­matics and the physical and life sciences.