Determination of the Point-spread Function for the Fermi Large Area Telescope from On-orbit Data and Limits on Pair Halos of Active Galactic Nuclei

Markus Ackermann; Marco Ajello; A. Allafort; K. Asano; W.B. Atwood; Luca Baldini; Jean Ballet; Guido Barbiellini; D. Bastieri; K. Bechtol; R. Bellazzini; E.D. Bloom; E. Bonamente; A.W. Borgland; E. Bottacini; T.J. Brandt; J. Bregeon; M. Brigida; Pascal Bruel; R. Buehler; T.H. Burnett; G. Busetto; S. Buson; G.A. Caliandro; R.A. Cameron; P. A. Caraveo; J.M. Casandjian; C. Cecchi; E. Charles; S. Chaty; A. Chekhtman; C.C. Cheung; J. Chiang; A.N. Cillis; S. Ciprini; R. Claus; J. Cohen-Tanugi; S. Colafrancesco; J. Conrad; S. Cutini; F. d'Ammando; F. de Palma; C.D. Dermer; E.D.E. Silva; Do Couto; S. Drell; A. Drlica-Wagner; R. Dubois; C. Favuzzi; S.J. Fegan; E.C. Ferrara; W.B. Focke; Y. Fukazawa; S. Funk; P. Fusco; F. Gargano; D. Gasparrini; N. Gehrels; S. Germani; N. Giglietto; F. Giordano; M. Giroletti; T. Glanzman; G. Godfrey; P. Grandi; 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. Jóhannesson; R.P. Johnson; A.S. Johnson; T. Kamae; J. Kataoka; M. Kerr; Jürgen Knödlseder; M. Kuss; J. Lande; S. Larsson; L. Latronico; C. Lavalley; S.H. Lee; F. Longo; F. Loparco; B. Lott; M.N. Lovellette; P. Lubrano; M.N. Mazziotta; W. Mcconville; J.E. Mcenery; J. Mehault; P.F. Michelson; R.P. Mignani; 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; T. Ohsugi; N. Omodei; M. Orienti; E. Orlando; J.F. Ormes; D. Paneque; J.H. Panetta; V. Pelassa; J.S. Perkins; M. Pesce-Rollins; M. Pierbattista; F. Piron; G. Pivato; H. Poon; T.A. Porter; S. Rainò; R. Rando; M. Razzano; S. Razzaque; A. Reimer; O. Reimer; L.C. Reyes; S. Ritz; L.S. Rochester; C. Romoli; M. Roth; D.A. Sanchez; P.M. Saz Parkinson; J.D. Scargle; C. Sgrò; E.J. Siskind; A. Snyder; G. Spandre; P. Spinelli; T.E. Stephens; D.J. Suson; H. Tajima; H. Takahashi; T. Tanaka; J.G. Thayer; D.J. Thompson; L. Tibaldo; O. Tibolla; M. Tinivella; G. Tosti; E. Troja; T.L. Usher; J. Vandenbroucke; V. Vasileiou; G. Vianello; V. Vitale; A. von Kienlin; A.M. Waite; E. Wallace; P. Weltevrede; B.L. Winer; K.S. Wood; M. Wood; S. Zimmer

doi:10.1088/0004-637X/765/1/54

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Determination of the Point-spread Function for the Fermi Large Area Telescope from On-orbit Data and Limits on Pair Halos of Active Galactic Nuclei

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Determination of the Point-spread Function for the Fermi Large Area Telescope from On-orbit Data and Limits on Pair Halos of Active Galactic Nuclei

Markus Ackermann, Marco Ajello, A. Allafort, K. Asano, W.B. Atwood, Luca Baldini, Jean Ballet, Guido Barbiellini, D. Bastieri, K. Bechtol, …

The Astrophysical Journal, Vol.765

2013

DOI: https://doi.org/10.1088/0004-637X/765/1/54

Abstract

galaxies: active

galaxies: halos

gamma rays: galaxies

instrumentation: detectors

intergalactic medium

The Large Area Telescope (LAT) on the Fermi Gamma-ray Space Telescope is a pair-conversion telescope designed to detect photons with energies from ≈20 MeV to >300 GeV. The pre-launch response functions of the LAT were determined through extensive Monte Carlo simulations and beam tests. The point-spread function (PSF) characterizing the angular distribution of reconstructed photons as a function of energy and geometry in the detector is determined here from two years of on-orbit data by examining the distributions of γ rays from pulsars and active galactic nuclei (AGNs). Above 3 GeV, the PSF is found to be broader than the pre-launch PSF. We checked for dependence of the PSF on the class of γ-ray source and observation epoch and found none. We also investigated several possible spatial models for pair-halo emission around BL Lac AGNs. We found no evidence for a component with spatial extension larger than the PSF and set upper limits on the amplitude of halo emission in stacked images of low- and high-redshift BL Lac AGNs and the TeV blazars 1ES0229+200 and 1ES0347-121.

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Title: Determination of the Point-spread Function for the Fermi Large Area Telescope from On-orbit Data and Limits on Pair Halos of Active Galactic Nuclei
Creators - without role: Markus Ackermann - Deutsches Elektronen-Synchrotron DESY
Marco Ajello - Stanford University
A. Allafort - Kavli Institute for Particle Astrophysics and Cosmology
K. Asano - Tokyo Institute of Technology
W.B. Atwood - University of California, Santa Cruz
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.D. Bloom - Kavli Institute for Particle Astrophysics and Cosmology
E. Bonamente - University of Perugia
A.W. Borgland - Stanford University
E. Bottacini - SLAC National Accelerator Laboratory
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 - University of Washington
G. Busetto - University of Padua
S. Buson - University of Padua
G.A. Caliandro - Institute of Space Sciences
R.A. Cameron - Stanford University
P. A. Caraveo - Istituto di Astrofisica Spaziale e Fisica Cosmica di Milano
J.M. Casandjian - Université Paris Cité
C. Cecchi - University of Perugia
E. Charles - Kavli Institute for Particle Astrophysics and Cosmology
S. Chaty - Université Paris Cité
A. Chekhtman - George Mason University
C.C. Cheung - National Academy of Sciences
J. Chiang - Kavli Institute for Particle Astrophysics and Cosmology
A.N. Cillis - Goddard Space Flight Center
S. Ciprini - University of Perugia
R. Claus - Kavli Institute for Particle Astrophysics and Cosmology
J. Cohen-Tanugi - Laboratoire Univers et Particules de Montpellier
S. Colafrancesco - Agenzia Spaziale Italiana
J. Conrad - Stockholm University
S. Cutini - Agenzia Spaziale Italiana
F. d'Ammando
F. de Palma - Istituto Nazionale di Fisica Nucleare, Sezione di Bari
C.D. Dermer - United States Naval Research Laboratory
E.D.E. Silva
Do Couto
S. Drell
A. Drlica-Wagner - Kavli Institute for Particle Astrophysics and Cosmology
R. Dubois - Kavli Institute for Particle Astrophysics and Cosmology
C. Favuzzi - Polytechnic University of Bari
S.J. Fegan - Centre National de la Recherche Scientifique
E.C. Ferrara - Goddard Space Flight Center
W.B. Focke - Stanford University
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
S. Germani - University of Perugia
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
P. Grandi - National Institute for Astrophysics
I.A. Grenier - CEA Paris-Saclay
J.E. Grove - United States Naval Research Laboratory
S. Guiriec - University of Alabama in Huntsville
D. Hadasch - Institute of Space Sciences
M. Hayashida - Stanford University
E. Hays - Goddard Space Flight Center
D. Horan - Laboratoire Leprince-Ringuet
X. Hou - Laboratoire de Physique des deux infinis Bordeaux
R.E. Hughes - The Ohio State University
M.S. Jackson - AlbaNova
T. Jogler - Stanford University
G. Jóhannesson - University of Iceland
R.P. Johnson - University of California, Santa Cruz
A.S. Johnson - Stanford University
T. Kamae - Kavli Institute for Particle Astrophysics and Cosmology
J. Kataoka - Waseda University
M. Kerr - Kavli Institute for Particle Astrophysics and Cosmology
Jürgen Knödlseder - Université de Toulouse
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
S.H. Lee - Kyoto University
F. Longo - Istituto Nazionale di Fisica Nucleare, Sezione di Trieste
F. Loparco - Polytechnic University of Bari
B. Lott - Laboratoire de Physique des deux infinis Bordeaux
M.N. Lovellette - United States Naval Research Laboratory
P. Lubrano - University of Perugia
M.N. Mazziotta - Istituto Nazionale di Fisica Nucleare, Sezione di Bari
W. Mcconville - Goddard Space Flight Center
J.E. Mcenery - University of Maryland, College Park
J. Mehault - Université de Montpellier, Laboratoire Univers et Particules de Montpellier - LUPM
P.F. Michelson - Kavli Institute for Particle Astrophysics and Cosmology
R.P. Mignani - University College London
W. Mitthumsiri - Kavli Institute for Particle Astrophysics and Cosmology
T. Mizuno - Hiroshima University
A.A. Moiseev - Goddard Space Flight Center
C. Monte - Polytechnic University of Bari
M.E. Monzani - Kavli Institute for Particle Astrophysics and Cosmology
A. Morselli - Istituto Nazionale di Fisica Nucleare, Roma Tor Vergata
I.V. Moskalenko - Stanford University
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 - Boise State University
E. Nuss - Université de Montpellier, Laboratoire Univers et Particules de Montpellier - LUPM
T. Ohsugi - Hiroshima University
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 - University of Denver
D. Paneque - SLAC National Accelerator Laboratory
J.H. Panetta - Kavli Institute for Particle Astrophysics and Cosmology
V. Pelassa - University of Alabama in Huntsville
J.S. Perkins - Goddard Space Flight Center
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
H. Poon - University of Padua
T.A. Porter - Kavli Institute for Particle Astrophysics and Cosmology
S. Rainò - 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 - Kavli Institute for Particle Astrophysics and Cosmology
O. Reimer - Kavli Institute for Particle Astrophysics and Cosmology
L.C. Reyes - California Polytechnic State University
S. Ritz - University of California, Santa Cruz
L.S. Rochester - Kavli Institute for Particle Astrophysics and Cosmology
C. Romoli - University of Padua
M. Roth - University of Washington
D.A. Sanchez - Max Planck Institute for Nuclear Physics
P.M. Saz Parkinson
J.D. Scargle - Ames Research Center
C. Sgrò - Istituto Nazionale di Fisica Nucleare, Sezione di Pisa
E.J. Siskind - Real Time Tomography
A. Snyder - Stanford University
G. Spandre - Istituto Nazionale di Fisica Nucleare, Sezione di Pisa
P. Spinelli - Polytechnic University of Bari
T.E. Stephens - Goddard Space Flight Center
D.J. Suson - Purdue University Northwest
H. Tajima - Kavli Institute for Particle Astrophysics and Cosmology
H. Takahashi - Hiroshima University
T. Tanaka - Kavli Institute for Particle Astrophysics and Cosmology
J.G. Thayer - Kavli Institute for Particle Astrophysics and Cosmology
D.J. Thompson - Goddard Space Flight Center
L. Tibaldo - University of Padua
O. Tibolla - University of Würzburg
M. Tinivella - Istituto Nazionale di Fisica Nucleare, Sezione di Pisa
G. Tosti - University of Perugia
E. Troja - Goddard Space Flight Center
T.L. Usher - Kavli Institute for Particle Astrophysics and Cosmology
J. Vandenbroucke - Kavli Institute for Particle Astrophysics and Cosmology
V. Vasileiou - Université de Montpellier, Laboratoire Univers et Particules de Montpellier - LUPM
G. Vianello - Consorzio Interuniversitario Fisica Spaziale
V. Vitale - Istituto Nazionale di Fisica Nucleare, Roma Tor Vergata
A. von Kienlin - Max Planck Institute for Extraterrestrial Physics
A.M. Waite
E. Wallace - University of Washington
P. Weltevrede - University of Manchester
B.L. Winer - The Ohio State University
K.S. Wood - United States Naval Research Laboratory
M. Wood - Kavli Institute for Particle Astrophysics and Cosmology
S. Zimmer - AlbaNova
Publication Details: The Astrophysical Journal, Vol.765
Identifiers: 9937369909311
Academic Unit: Laboratoire Univers et Particules de Montpellier - LUPM
Language: English
Resource Type: Journal article
Local Fields: in2p3-00823282