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Please use this identifier to cite or link to this item: http://repository.li.mahidol.ac.th/dspace/handle/123456789/43600
Title: FERMI-LAT OBSERVATIONS of HIGH-ENERGY γ-RAY EMISSION TOWARD the GALACTIC CENTER
Authors: M. Ajello
A. Albert
W. B. Atwood
G. Barbiellini
D. Bastieri
K. Bechtol
R. Bellazzini
E. Bissaldi
R. D. Blandford
E. D. Bloom
R. Bonino
E. Bottacini
T. J. Brandt
J. Bregeon
P. Bruel
R. Buehler
S. Buson
G. A. Caliandro
R. A. Cameron
R. Caputo
M. Caragiulo
P. A. Caraveo
C. Cecchi
A. Chekhtman
J. Chiang
G. Chiaro
S. Ciprini
J. Cohen-Tanugi
L. R. Cominsky
J. Conrad
S. Cutini
F. D'Ammando
A. De Angelis
F. De Palma
R. Desiante
L. Di Venere
P. S. Drell
C. Favuzzi
E. C. Ferrara
P. Fusco
F. Gargano
D. Gasparrini
N. Giglietto
P. Giommi
F. Giordano
M. Giroletti
T. Glanzman
G. Godfrey
G. A. Gomez-Vargas
I. A. Grenier
S. Guiriec
M. Gustafsson
A. K. Harding
J. W. Hewitt
A. B. Hill
D. Horan
T. Jogler
G. Jóhannesson
A. S. Johnson
T. Kamae
C. Karwin
J. Knödlseder
M. Kuss
S. Larsson
L. Latronico
J. Li
L. Li
F. Longo
F. Loparco
M. N. Lovellette
P. Lubrano
Clemson University
Kavli Institute for Particle Astrophysics and Cosmology
Santa Cruz Institute for Particle Physics
Istituto Nazionale di Fisica Nucleare, Roma
Universita degli Studi di Trieste
Istituto Nazionale Di Fisica Nucleare, Sezione di Padova
Università degli Studi di Padova
University of Wisconsin Madison
Istituto Nazionale Di Fisica Nucleare, Sezione di Pisa
Università degli Studi di Torino
NASA Goddard Space Flight Center
Laboratoire Univers et Particules de Montpellier
Laboratoire Leprince-Ringuet
Deutsche Elektronen-Synchrotron
Consorzio Interuniversitario per la Fisica Spaziale (CIFS)
INAF Istituto di Astrofisica Spaziale e Fisica Cosmica, Milan
Universita degli Studi di Perugia
George Mason University, Fairfax Campus
Agenzia Spaziale Italiana
Osservatorio Astronomico di Roma
Sonoma State University
Stockholms universitet
Oskar Klein Centre for Cosmoparticle Physics
Kungl. Vetenskapsakademien
Istituto Di Radioastronomia, Bologna
Alma Mater Studiorum Università di Bologna
Universita degli Studi di Udine
Università degli Studi di Napoli Federico II
Università degli Studi di Bari
Pontificia Universidad Católica de Chile
Institut de Recherche sur les Lois Fondamentales de l'Univers
Universität Göttingen
University of North Florida
University of Southampton
University Science Institute Reykjavik
University of Tokyo
University of California, Irvine
CNRS Centre National de la Recherche Scientifique
Universite de Toulouse
The Royal Institute of Technology (KTH)
Universitat Autònoma de Barcelona
Naval Research Laboratory
University of Maryland
Mahidol University
Hiroshima University
University of Denver
Max Planck Institut fur Physik (Werner-Heisenberg-Institut)
The University of Hong Kong
Medizinische Universitat Innsbruck
Keywords: Earth and Planetary Sciences
Issue Date: 1-Mar-2016
Citation: Astrophysical Journal. Vol.819, No.1 (2016)
Abstract: © 2016. The American Astronomical Society. All rights reserved. The Fermi Large Area Telescope (LAT) has provided the most detailed view to date of the emission toward the Galactic center (GC) in high-energy γ-rays. This paper describes the analysis of data taken during the first 62 months of the mission in the energy range 1-100 GeV from a 15° × 15° region about the direction of the GC. Specialized interstellar emission models (IEMs) are constructed to enable the separation of the γ-ray emissions produced by cosmic ray particles interacting with the interstellar gas and radiation fields in the Milky Way into that from the inner ∼1 kpc surrounding the GC, and that from the rest of the Galaxy. A catalog of point sources for the 15° × 15° region is self-consistently constructed using these IEMs: the First Fermi-LAT Inner Galaxy Point Source Catalog (1FIG). The spatial locations, fluxes, and spectral properties of the 1FIG sources are presented, and compared with γ-ray point sources over the same region taken from existing catalogs. After subtracting the interstellar emission and point-source contributions a residual is found. If templates that peak toward the GC are used to model the positive residual the agreement with the data improves, but none of the additional templates tried account for all of its spatial structure. The spectrum of the positive residual modeled with these templates has a strong dependence on the choice of IEM.
URI: https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=84960950940&origin=inward
http://repository.li.mahidol.ac.th/dspace/handle/123456789/43600
ISSN: 15384357
0004637X
Appears in Collections:Scopus 2016-2017

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