Astronomers see black hole in NGC 1275 fire radio jets 300 days after X-ray flare

Using NASA's Swift X-ray telescope and radio observations, astronomers watched a supermassive black hole in galaxy NGC 1275 flare in February 2023 and emit radio jets about 300 days later. The black hole's mass is estimated at 100 million to 1 billion solar masses.

• The February 2023 flare doubled the X-ray brightness of the NGC 1275 core and lasted under 60 days
• Radio jets appeared roughly 300 days after the X-ray flare
• The black hole's mass is estimated at 100 million to 1 billion solar masses
• Swift data span 2007 to 2025