Journal articles
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
1
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
2
R. Buehler
T.H. Burnett
G. Busetto
S. Buson
G.A. Caliandro
R.A. Cameron
P. A. Caraveo
J.M. Casandjian
1
C. Cecchi
E. Charles
3
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
2
E.C. Ferrara
W.B. Focke
Y. Fukazawa
S. Funk
P. Fusco
4
F. Gargano
4
D. Gasparrini
N. Gehrels
S. Germani
N. Giglietto
F. Giordano
4
M. Giroletti
T. Glanzman
G. Godfrey
P. Grandi
I.A. Grenier
J.E. Grove
S. Guiriec
D. Hadasch
M. Hayashida
E. Hays
D. Horan
2
X. Hou
5
R.E. Hughes
M.S. Jackson
T. Jogler
G. Jóhannesson
R.P. Johnson
A.S. Johnson
T. Kamae
J. Kataoka
M. Kerr
J. Knödlseder
M. Kuss
J. Lande
S. Larsson
L. Latronico
C. Lavalley
S.H. Lee
F. Longo
F. Loparco
4
B. Lott
5
M.N. Lovellette
P. Lubrano
M.N. Mazziotta
4
W. Mcconville
J.E. Mcenery
J. Mehault
6
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
6
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
1
F. Piron
6
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
6
G. Vianello
V. Vitale
A. von Kienlin
A.M. Waite
E. Wallace
P. Weltevrede
B.L. Winer
K.S. Wood
M. Wood
S. Zimmer
W.B. Atwood
Author
Luca Baldini
Author
Jean Ballet 1
Author Employer institution : Département de Physique Nucléaire (ex SPhN)
Guido Barbiellini
Author
J. Bregeon
Author
M. Brigida
Author
Pascal Bruel 2
Author Employer institution : Centre National de la Recherche Scientifique
R. Buehler
Author
J. Cohen-Tanugi
Author IdHAL : johann-cohen-tanugi arXiv : https://arxiv.org/a/johannct ORCID : https://orcid.org/0000-0001-9022-4232
S. Colafrancesco
Author
J. Conrad
Author
S. Cutini
Author
J. Kataoka
Author
M. Kerr
Author
J. Knödlseder
Author IdHAL : jurgen-knodlseder ORCID : https://orcid.org/0000-0002-0014-7809
M. Kuss
Author
S.H. Lee
Author
F. Longo
Author
F. Loparco 4
Author
B. Lott 5
Author IdHAL : benoit-lott ORCID : https://orcid.org/0000-0003-2186-9242
F. Piron 6
Author IdHAL : frederic-piron ORCID : https://orcid.org/0000-0001-6885-7156
G. Pivato
Author
H. Poon
Author
T.A. Porter
Author
1
AIM (UMR_7158 / UMR_E_9005 / UM_112) - Astrophysique Interprétation Modélisation (AIM - UMR 7158 - UMR E 9005,
ex "Astrophysique Interactions Multi-échelles",
Service d'astrophysique,
CEA/Saclay,
Orme des Merisiers
F-91191 GIF SUR YVETTE CEDEX - France)
- CNRS - Centre National de la Recherche Scientifique : UMR_7158 (France)
- INSU - CNRS - Institut national des sciences de l'Univers (INSU-CNRS 3 rue Michel-Ange, 75794 Paris Cedex 16 - France)
- CEA - Commissariat à l'énergie atomique et aux énergies alternatives : UMR_E_9005 (Centre de Saclay Centre de Grenoble Centre de Cadarache etc - France)
- UPD7 - Université Paris Diderot - Paris 7 : UMR_7158 (5 rue Thomas-Mann - 75205 Paris cedex 13 - France)
2
LLR - Laboratoire Leprince-Ringuet (Route de Saclay - 91128 Palaiseau Cedex - France)
- IN2P3 - Institut National de Physique Nucléaire et de Physique des Particules du CNRS (France)
- X - École polytechnique (École polytechnique, 91128 Palaiseau Cedex - France)
- CNRS - Centre National de la Recherche Scientifique : UMR7638 (France)
3
CSIRO - Commonwealth Scientific and Industrial Research Organisation [Canberra] (GPO Box 1700, Canberra ACT 2600 - Australia)
4
INFN, sezione di Bari - Istituto Nazionale di Fisica Nucleare, sezione di Bari (Via Orabona, 4 70126 Bari - Italy)
5
GLAST (France)
- CENBG - Centre d'Etudes Nucléaires de Bordeaux Gradignan (Chemin du Solarium - BP 120 - 33175 Gradignan Cedex - France)
- Université Sciences et Technologies - Bordeaux 1 (351 cours de la Libération - 33405 Talence cedex - France)
- IN2P3 - Institut National de Physique Nucléaire et de Physique des Particules du CNRS (France)
- CNRS - Centre National de la Recherche Scientifique : UMR5797 (France)
6
LUPM - Laboratoire Univers et Particules de Montpellier (Université de Montpellier Place Eugène Bataillon - CC 72 34095 Montpellier Cédex 05 - France)
- UM - Université de Montpellier (163 rue Auguste Broussonnet - 34090 Montpellier - France)
- UM2 - Université Montpellier 2 - Sciences et Techniques (Place Eugène Bataillon - 34095 Montpellier cedex 5 - France)
- IN2P3 - Institut National de Physique Nucléaire et de Physique des Particules du CNRS (France)
- CNRS - Centre National de la Recherche Scientifique : UMR5299 (France)
Abstract : 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.
Document type :
Journal articles
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http://hal.in2p3.fr/in2p3-00823282
Contributor : Nathalie Martin <>
Submitted on : Thursday, May 16, 2013 - 3:13:46 PM
Last modification on : Friday, November 27, 2020 - 5:52:10 AM
Contributor : Nathalie Martin <>
Submitted on : Thursday, May 16, 2013 - 3:13:46 PM
Last modification on : Friday, November 27, 2020 - 5:52:10 AM
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- HAL Id : in2p3-00823282, version 1
- DOI : 10.1088/0004-637X/765/1/54
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Citation
Markus Ackermann, Marco Ajello, A. Allafort, K. Asano, W.B. Atwood, et al.. 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. The Astrophysical Journal, American Astronomical Society, 2013, 765, pp.54. ⟨10.1088/0004-637X/765/1/54⟩. ⟨in2p3-00823282⟩
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