Fermi Large Area Telescope Performance After 10 Years Of Operation

The Fermi LAT Collaboration: M. Ajello; W. B. Atwood; M. Axelsson; R.; Bagagli; M. Bagni; L. Baldini; D. Bastieri; F. Bellardi; R. Bellazzini; E.; Bissaldi; E. D. Bloom; R. Bonino; J. Bregeon; A. Brez; P. Bruel; R. Buehler,; S. Buson; R. A. Cameron; P. A. Caraveo; E. Cavazzuti; M. Ceccanti; S. Chen,; C. C. Cheung; S. Ciprini; I. Cognard; J. Cohen-Tanugi; S. Cutini; F.; D'Ammando; P. de la Torre Luque; F. de Palma; S. W. Digel; F. Dirirsa; N. Di; Lalla; L. Di Venere; A. Dom\'inguez; D. Fabiani; E. C. Ferrara; A. Fiori; G.; Foglia; Y. Fukazawa; P. Fusco; F. Gargano; D. Gasparrini; M. Giroletti; T.; Glanzman; D. Green; S. Griffin; M.-H. Grondin; J. E. Grove; L. Guillemot; S.; Guiriec; M. Gustafsson; E. Hays; D. Horan; G. J\'ohannesson; T. J. Johnson,; T. Kamae; M. Kerr; M. Kuss; S. Larsson; L. Latronico; M. Lemoine-Goumard; J.; Li; I. Liodakis; F. Longo; F. Loparco; M. N. Lovellette; P. Lubrano; S.; Maldera; A. Manfreda; G. Mart\'i-Devesa; M. N. Mazziotta; N. Menon; I. Mereu,; M. Meyer; P. F. Michelson; M. Minuti; W. Mitthumsiri; T. Mizuno; M. Mongelli,; M. E. Monzani; I. V. Moskalenko; M. Negro; E. Nuss; R. Ojha; M. Orienti; E.; Orlando; A. Paccagnella; V. S. Paliya; D. Paneque; Z. Pei; J. S. Perkins; M.; Pesce-Rollins; M. Pinchera; F. Piron; H. Poon; T. A. Porter; R. Primavera; G.; Principe; J. L. Racusin; S. Rain\`o; R. Rando; B. Rani; E. Rapposelli; M.; Razzano; S. Razzaque; A. Reimer; O. Reimer; J. J. Russell; N. Saggini; P. M.; Saz Parkinson; N. Scolieri; D. Serini; C. Sgr\`o; E. J. Siskind; D. A. Smith,; G. Spandre; P. Spinelli; D. J. Suson; H. Tajima; J. G. Thayer; D. J.; Thompson; L. Tibaldo; D. F. Torres; G. Tosti; J. Valverde; L. Vigiani; G.; Zaharijas

arXiv:2106.12203·astro-ph.IM·September 7, 2021

Fermi Large Area Telescope Performance After 10 Years Of Operation

The Fermi LAT Collaboration: M. Ajello, W. B. Atwood, M. Axelsson, R., Bagagli, M. Bagni, L. Baldini, D. Bastieri, F. Bellardi, R. Bellazzini, E., Bissaldi, E. D. Bloom, R. Bonino, J. Bregeon, A. Brez, P. Bruel, R. Buehler,, S. Buson, R. A. Cameron, P. A. Caraveo, E. Cavazzuti

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TL;DR

This paper reviews the Fermi LAT's performance after 10 years, confirming it meets specifications and supporting future gamma-ray observatory designs.

Contribution

It provides a comprehensive assessment of the LAT's long-term performance, validating design choices and informing future instrument development.

Findings

01

LAT performance remains within specifications after 10 years

02

Instrument design choices are validated by sustained performance

03

Supports extension of the Fermi mission and future observatory planning

Abstract

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.

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