4 ms·
Separate post on HN https://apod.nasa.gov/apod/ap221015.html https://apod.nasa.gov/apod/ap221015.html Image of the same event from the Fermi LAT. The Fermi G
by JamesVI 4y ago
Separate post on HN
https://apod.nasa.gov/apod/ap221015.html https://apod.nasa.gov/apod/ap221015.html
Image of the same event from the Fermi LAT.
The Fermi GRB is one of the instruments listed in the article as detecting the initial burst and would had generated a redirection request for a whole family of different telescopes, including Fermi itself.
Actually, this is a better page with both the swift and fermi images.
https://www.nasa.gov/feature/goddard/2022/nasa-s-swift-fermi-missions-detect-exceptional-cosmic-blast/ https://www.nasa.gov/feature/goddard/2022/nasa-s-swift-fermi...
- 8bitsrule 4y agoLongevity: The explanation on NASA's APOD page states: " In low Earth orbit Fermi’s Large Area Telescope recorded gamma-ray photons from the burst for more than 10 hours as high-energy radiation from GRB 221009A swept over planet Earth last Sunday, October 9. " while the second is more specific: "the afterglow of GRB 221009A faded over the course of about 10 hours." Related interest: The Earth's atmosphere itself produces gamma flashes up to 20MeV: https://en.wikipedia.org/wiki/Terrestrial_gamma-ray_flash https://en.wikipedia.org/wiki/Terrestrial_gamma-ray_flash And: "Possible Role of Gamma Ray Bursts on Life Extinction in the Universe" (abstract only): https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.113.231102 https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.11...