Observations investigate long-term X-ray variability of young stellar object HL Tauri

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Observations investigate long-term X-ray variability of young stellar object HL Tauri

Using ESA's XMM-Newton satellite and NASA's Chandra X-ray observatory, astronomers have observed a young stellar object known as HL Tauri. Results of the observation campaign, presented Feb. 11 on the arXiv pre-print server, yield important insights into long-term X-ray variability and properties of this object.