The Fermi Large Area Telescope On Orbit: Event Classification, Instrument Response Functions, and Calibration

Markus Ackermann; Marco Ajello; A. Albert; A. Allafort; W. B. Atwood; Magnus Axelsson; Luca Baldini; Jean Ballet; Guido Barbiellini; D. Bastieri; K. Bechtol; R. Bellazzini; E. Bissaldi; R. D. Blandford; E. D. Bloom; J. R. Bogart; E. Bonamente; A. W. Borgland; E. Bottacini; A. Bouvier; T. J. Brandt; J. Bregeon; M. Brigida; Pascal Bruel; R. Buehler; T. H. Burnett; S. Buson; G. A. Caliandro; R. A. Cameron; P. A. Caraveo; J. M. Casandjian; E. Cavazzuti; C. Cecchi; O. Celik; E. Charles; R.C.G. Chaves; A. Chekhtman; C. C. Cheung; J. Chiang; S. Ciprini; R. Claus; J. Cohen-Tanugi; J. Conrad; R. Corbet; S. Cutini; F. d'Ammando; D. S. Davis; A. de Angelis; M. Deklotz; F. de Palma; C. D. Dermer; S. W. Digel; E. Do Couto E Silva; P. S. Drell; A. Drlica-Wagner; R. Dubois; C. Favuzzi; S. J. Fegan; E. C. Ferrara; W. B. Focke; P. Fortin; Y. Fukazawa; S. Funk; P. Fusco; F. Gargano; D. Gasparrini; N. Gehrels; B. Giebels; N. Giglietto; F. Giordano; M. Giroletti; T. Glanzman; G. Godfrey; I. A. Grenier; J. E. Grove; S. Guiriec; D. Hadasch; M. Hayashida; E. Hays; D. Horan; X. Hou; R. E. Hughes; M. S. Jackson; T. Jogler; G. Johannesson; R. P. Johnson; T. J. Johnson; W. N. Johnson; T. Kamae; H. Katagiri; J. Kataoka; M. Kerr; Jürgen Knödlseder; M. Kuss; J. Lande; S. Larsson; L. Latronico; C. Lavalley; M. Lemoine-Goumard; F. Longo; F. Loparco; B. Lott; M. N. Lovellette; P. Lubrano; M. N. Mazziotta; W. Mcconville; J. E. Mcenery; J. Mehault; P. F. Michelson; W. Mitthumsiri; T. Mizuno; A. A. Moiseev; C. Monte; M. E. Monzani; A. Morselli; I. V. Moskalenko; S. Murgia; M. Naumann-Godo; R. Nemmen; S. Nishino; J. P. Norris; E. Nuss; M. Ohno; T. Ohsugi; A. Okumura; N. Omodei; M. Orienti; E. Orlando; J. F. Ormes; D. Paneque; J. H. Panetta; J. S. Perkins; M. Pesce-Rollins; M. Pierbattista; F. Piron; G. Pivato; T.A. Porter; J. L. Racusin; S. Raino; R. Rando; M. Razzano; S. Razzaque; A. Reimer; O. Reimer; T. Reposeur; L. C. Reyes; S. Ritz; L. S. Rochester; C. Romoli; M. Roth; H. F.-W. Sadrozinski; D.A. Sanchez; P. M. Saz Parkinson; C. Sbarra; J. D. Scargle; C. Sgro; J. Siegal-Gaskins; E. J. Siskind; G. Spandre; P. Spinelli; T. E. Stephens; D. J. Suson; H. Tajima; H. Takahashi; T. Tanaka; J. G. Thayer; J. B. Thayer; D. J. Thompson; L. Tibaldo; M. Tinivella; G. Tosti; E. Troja; T. L. Usher; J. Vandenbroucke; B. van Klaveren; V. Vasileiou; G. Vianello; V. Vitale; A. P. Waite; E. Wallace; B. L. Winer; D. L. Wood; K. S. Wood; M. Wood; Z. Yang; S. Zimmer

doi:10.1088/0067-0049/203/1/4

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The Fermi Large Area Telescope On Orbit: Event Classification, Instrument Response Functions, and Calibration

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The Fermi Large Area Telescope On Orbit: Event Classification, Instrument Response Functions, and Calibration

Markus Ackermann, Marco Ajello, A. Albert, A. Allafort, W. B. Atwood, Magnus Axelsson, Luca Baldini, Jean Ballet, Guido Barbiellini, D. Bastieri, …

The Astrophysical Journal Supplement, Vol.203

09/06/2012

DOI: https://doi.org/10.1088/0067-0049/203/1/4

Abstract

The Fermi Large Area Telescope (Fermi-LAT, hereafter LAT), the primary instrument on 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 20 MeV to more than 300 GeV. During the first years of the mission the LAT team has gained considerable insight into the in-flight performance of the instrument. Accordingly, we have updated the analysis used to reduce LAT data for public release as well as the Instrument Response Functions (IRFs), the description of the instrument performance provided for data analysis. In this paper we describe the effects that motivated these updates. Furthermore, we discuss how we originally derived IRFs from Monte Carlo simulations and later corrected those IRFs for discrepancies observed between flight and simulated data. We also give details of the validations performed using flight data and quantify the residual uncertainties in the IRFs. Finally, we describe techniques the LAT team has developed to propagate those uncertainties into estimates of the systematic errors on common measurements such as fluxes and spectra of astrophysical sources.

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Title: The Fermi Large Area Telescope On Orbit: Event Classification, Instrument Response Functions, and Calibration
Creators - without role: Markus Ackermann - Deutsches Elektronen-Synchrotron DESY
Marco Ajello - Stanford University
A. Albert - The Ohio State University
A. Allafort - Kavli Institute for Particle Astrophysics and Cosmology
W. B. Atwood
Magnus Axelsson - Fraunhofer Chalmers Research Centre for Industrial Mathematics
Luca Baldini - Istituto Nazionale di Fisica Nucleare, Sezione di Pisa
Jean Ballet - Astrophysique, Instrumentation et Modélisation
Guido Barbiellini - University of Trieste
D. Bastieri - University of Padua
K. Bechtol - Kavli Institute for Particle Astrophysics and Cosmology
R. Bellazzini - Istituto Nazionale di Fisica Nucleare, Sezione di Pisa
E. Bissaldi - Universität Innsbruck
R. D. Blandford
E. D. Bloom
J. R. Bogart
E. Bonamente - University of Perugia
A. W. Borgland
E. Bottacini - SLAC National Accelerator Laboratory
A. Bouvier - University of California, Santa Cruz
T. J. Brandt - Institut de Recherche en Astrophysique et Planétologie
J. Bregeon - Istituto Nazionale di Fisica Nucleare, Sezione di Pisa
M. Brigida - Polytechnic University of Bari
Pascal Bruel - École Polytechnique
R. Buehler - Kavli Institute for Particle Astrophysics and Cosmology
T. H. Burnett
S. Buson - University of Padua
G. A. Caliandro
R. A. Cameron
P. A. Caraveo - Istituto di Astrofisica Spaziale e Fisica Cosmica di Milano
J. M. Casandjian - Astrophysique Interprétation Modélisation
E. Cavazzuti - Agenzia Spaziale Italiana
C. Cecchi - University of Perugia
O. Celik - Goddard Space Flight Center
E. Charles - Kavli Institute for Particle Astrophysics and Cosmology
R.C.G. Chaves - Université Paris Cité
A. Chekhtman - George Mason University
C. C. Cheung
J. Chiang - Kavli Institute for Particle Astrophysics and Cosmology
S. Ciprini - University of Perugia
R. Claus - Kavli Institute for Particle Astrophysics and Cosmology
J. Cohen-Tanugi - Université de Montpellier, Laboratoire Univers et Particules de Montpellier - LUPM
J. Conrad - Stockholm University
R. Corbet - University of Maryland, Baltimore County
S. Cutini - Agenzia Spaziale Italiana
F. d'Ammando
D. S. Davis
A. de Angelis - Istituto Nazionale di Fisica Nucleare, Sezione di Trieste
M. Deklotz - Stellar Solutions
F. de Palma - Istituto Nazionale di Fisica Nucleare, Sezione di Bari
C. D. Dermer
S. W. Digel
E. Do Couto E Silva
P. S. Drell
A. Drlica-Wagner - Stanford University
R. Dubois - SLAC National Accelerator Laboratory
C. Favuzzi - Polytechnic University of Bari
S. J. Fegan - Laboratoire Leprince-Ringuet
E. C. Ferrara
W. B. Focke
P. Fortin - Centre National de la Recherche Scientifique
Y. Fukazawa - Hiroshima University
S. Funk - Stanford University
P. Fusco - Polytechnic University of Bari
F. Gargano - Istituto Nazionale di Fisica Nucleare, Sezione di Bari
D. Gasparrini - Agenzia Spaziale Italiana
N. Gehrels - Goddard Space Flight Center
B. Giebels - Laboratoire Leprince-Ringuet
N. Giglietto - Istituto Nazionale di Fisica Nucleare, Sezione di Bari
F. Giordano - Polytechnic University of Bari
M. Giroletti - Istituto di Radioastronomia di Bologna
T. Glanzman - Stanford University
G. Godfrey - Kavli Institute for Particle Astrophysics and Cosmology
I. A. Grenier - Astrophysique Interprétation Modélisation
J. E. Grove
S. Guiriec - Goddard Space Flight Center
D. Hadasch - Institute of Space Sciences
M. Hayashida - Kavli Institute for Particle Astrophysics and Cosmology
E. Hays - Goddard Space Flight Center
D. Horan - Laboratoire Leprince-Ringuet
X. Hou - Laboratoire de Physique des deux infinis Bordeaux
R. E. Hughes
M. S. Jackson
T. Jogler - Stanford University
G. Johannesson - University of Iceland
R. P. Johnson
T. J. Johnson
W. N. Johnson
T. Kamae - Kavli Institute for Particle Astrophysics and Cosmology
H. Katagiri - Ibaraki University
J. Kataoka - Waseda University
M. Kerr - Kavli Institute for Particle Astrophysics and Cosmology
Jürgen Knödlseder - Institut de Recherche en Astrophysique et Planétologie
M. Kuss - Istituto Nazionale di Fisica Nucleare, Sezione di Pisa
J. Lande - Kavli Institute for Particle Astrophysics and Cosmology
S. Larsson - Stockholm University
L. Latronico - Istituto Nazionale di Fisica Nucleare, Sezione di Torino
C. Lavalley - Université de Montpellier, Laboratoire Univers et Particules de Montpellier - LUPM
M. Lemoine-Goumard - Laboratoire de Physique des deux infinis Bordeaux
F. Longo - University of Trieste
F. Loparco - Polytechnic University of Bari
B. Lott - Laboratoire de Physique des deux infinis Bordeaux
M. N. Lovellette
P. Lubrano - University of Perugia
M. N. Mazziotta
W. Mcconville - Goddard Space Flight Center
J. E. Mcenery
J. Mehault - Université de Montpellier, Laboratoire Univers et Particules de Montpellier - LUPM
P. F. Michelson
W. Mitthumsiri - Stanford University
T. Mizuno - Hiroshima University
A. A. Moiseev
C. Monte - Polytechnic University of Bari
M. E. Monzani
A. Morselli - Istituto Nazionale di Fisica Nucleare, Roma Tor Vergata
I. V. Moskalenko
S. Murgia - Kavli Institute for Particle Astrophysics and Cosmology
M. Naumann-Godo - CEA Paris-Saclay
R. Nemmen - Goddard Space Flight Center
S. Nishino - Hiroshima University
J. P. Norris
E. Nuss - Université de Montpellier, Laboratoire Univers et Particules de Montpellier - LUPM
M. Ohno - Institute of Space and Astronautical Science
T. Ohsugi - Hiroshima University
A. Okumura - Kavli Institute for Particle Astrophysics and Cosmology
N. Omodei - Kavli Institute for Particle Astrophysics and Cosmology
M. Orienti - Istituto di Radioastronomia di Bologna
E. Orlando - Kavli Institute for Particle Astrophysics and Cosmology
J. F. Ormes
D. Paneque - Kavli Institute for Particle Astrophysics and Cosmology
J. H. Panetta
J. S. Perkins
M. Pesce-Rollins - Istituto Nazionale di Fisica Nucleare, Sezione di Pisa
M. Pierbattista - Astrophysique, Instrumentation et Modélisation
F. Piron - Université de Montpellier, Laboratoire Univers et Particules de Montpellier - LUPM
G. Pivato - University of Padua
T.A. Porter - Kavli Institute for Particle Astrophysics and Cosmology
J. L. Racusin
S. Raino - Istituto Nazionale di Fisica Nucleare, Sezione di Bari
R. Rando - University of Padua
M. Razzano - Istituto Nazionale di Fisica Nucleare, Sezione di Pisa
S. Razzaque - George Mason University
A. Reimer - Universität Innsbruck
O. Reimer - Universität Innsbruck
T. Reposeur - Laboratoire de Physique des deux infinis Bordeaux
L. C. Reyes
S. Ritz - University of California, Santa Cruz
L. S. Rochester
C. Romoli - University of Padua
M. Roth - University of Washington
H. F.-W. Sadrozinski
D.A. Sanchez - Max Planck Institute for Nuclear Physics
P. M. Saz Parkinson
C. Sbarra - Istituto Nazionale di Fisica Nucleare, Sezione di Padova
J. D. Scargle
C. Sgro - Istituto Nazionale di Fisica Nucleare, Sezione di Pisa
J. Siegal-Gaskins - California Institute of Technology
E. J. Siskind
G. Spandre - Istituto Nazionale di Fisica Nucleare, Sezione di Pisa
P. Spinelli - Polytechnic University of Bari
T. E. Stephens
D. J. Suson
H. Tajima - Nagoya University
H. Takahashi - Hiroshima University
T. Tanaka - Stanford University
J. G. Thayer
J. B. Thayer
D. J. Thompson
L. Tibaldo - Istituto Nazionale di Fisica Nucleare, Sezione di Padova
M. Tinivella - Istituto Nazionale di Fisica Nucleare, Sezione di Pisa
G. Tosti - University of Perugia
E. Troja - Goddard Space Flight Center
T. L. Usher
J. Vandenbroucke - Kavli Institute for Particle Astrophysics and Cosmology
B. van Klaveren - Kavli Institute for Particle Astrophysics and Cosmology
V. Vasileiou - Université de Montpellier, Laboratoire Univers et Particules de Montpellier - LUPM
G. Vianello - Stanford University
V. Vitale - Istituto Nazionale di Fisica Nucleare, Roma Tor Vergata
A. P. Waite
E. Wallace - University of Washington
B. L. Winer
D. L. Wood
K. S. Wood
M. Wood - Kavli Institute for Particle Astrophysics and Cosmology
Z. Yang - AlbaNova
S. Zimmer - AlbaNova
Publication Details: The Astrophysical Journal Supplement, Vol.203
Identifiers: 9938573209311
Academic Unit: Laboratoire Univers et Particules de Montpellier - LUPM
Language: English
Resource Type: Journal article
Local Fields: in2p3-00767693