Fermi Large Area Telescope Performance After 10 Years Of Operation

Understand

The Large Area Telescope (LAT), the primary instrument for the Fermi Gamma-ray Space Telescope (Fermi) mission, is an imaging, wide field-of-view, high-energy gamma-ray telescope, covering the energy range from 30 MeV to more than 300 GeV.

• We describe the performance of the instrument at the 10-year milestone.
• LAT performance remains well within the specifications defined during the planning phase, validating the design choices and supporting the compelling case to extend the duration of the Fermi mission.
• The details provided here will be useful when designing the next generation of high-energy gamma-ray observatories.