The 365 Days of Astronomy UNAWE Space Scoop - A Mysterious Notification From a Dying Massive Star
Aug 30, 2025
Astronomers were jolted by a mysterious X-ray burst from a dying massive star, 2.8 billion light years away. Named EP 250108a, this fast X-ray transient was a rare opportunity for observation. Typically fleeting and difficult to detect, these bursts drew an international team of researchers eager to unravel their secrets. The discussion sheds light on the connection between such events and supernova remnants, expanding our understanding of cosmic phenomena.
AI Snips
Chapters
Transcript
Episode notes
Rare Close FXT Detection
- Astronomers detected a fast X-ray transient (FXT) 2.8 billion light years away named EP250108A (108A).
- The event offered rare close-up observations because FXTs are short-lived and usually distant.
Supernova Found At The FXT Site
- Gemini South and Gemini North pinpointed 108A's location and found the remains of a supernova.
- The associated supernova was cataloged as SN 2025 KG and nicknamed the kangaroo.
Trapped Jet And Progenitor Mass
- Continued monitoring showed an infrared trapped jet fading and a Type Ic-BL supernova dominating the spectra.
- Observations allowed the team to estimate the progenitor mass at about 15–30 solar masses.