Gamma-ray burst GRB 260310A ranks among brightest in 20 years

Astronomers have explained GRB 260310A, a burst detected by NASA's Fermi telescope on March 10: its jet pointed away from Earth, and the afterglow briefly outshone the host galaxy. The event ranked in the top 1% for optical and X-ray brightness and the top 5% for radio.

• Fermi detected the burst on March 10; it was classified as GRB 260310A
• The afterglow briefly outshone its host galaxy
• Optical and X-ray brightness ranked in the top 1%, radio in the top 5%
• The jet was viewed off-axis, revealing its structure