Search for Extended Sources in the Galactic Plane Using Six Years of Fermi -Large Area Telescope Pass 8 Data above 10 GeV

Ackermann, M.; Buehler, R.; Ajello, M.; Baldini, L.; Ballet, J.; Barbiellini, G.; Bastieri, D.; Bellazzini, R.; Bissaldi, E.; Caragiulo, M.; Bloom, E. D.; Bottacini, E.; Cameron, R. A.; Bonino, R.; Brandt, T. J.; Castro, D.; Bregeon, J.; Bruel, P.; Caraveo, P. A.; others, and

doi:10.3847/1538-4357/AA775A

Title: Search for Extended Sources in the Galactic Plane Using Six Years of Fermi -Large Area Telescope Pass 8 Data above 10 GeV

Journal Article · Mon Jul 10 00:00:00 EDT 2017 · Astrophysical Journal

DOI:https://doi.org/10.3847/1538-4357/AA775A· OSTI ID:22663401

Ackermann, M.; Buehler, R. ^[1]; Ajello, M. ^[2]; Baldini, L. ^[3]; Ballet, J. ^[4]; Barbiellini, G. ^[5]; Bastieri, D. ^[6]; Bellazzini, R. ^[7]; Bissaldi, E.; Caragiulo, M. ^[8]; Bloom, E. D.; Bottacini, E.; Cameron, R. A. ^[9]; Bonino, R. ^[10]; Brandt, T. J.; Castro, D. ^[11]; Bregeon, J. ^[12]; Bruel, P. ^[13]; Caraveo, P. A. ^[14]; others, and

Deutsches Elektronen Synchrotron DESY, D-15738 Zeuthen (Germany)
Department of Physics and Astronomy, Clemson University, Kinard Lab of Physics, Clemson, SC 29634-0978 (United States)
Università di Pisa and Istituto Nazionale di Fisica Nucleare, Sezione di Pisa I-56127 Pisa (Italy)
Laboratoire AIM, CEA-IRFU/CNRS/Université Paris Diderot, Service d’Astrophysique, CEA Saclay, F-91191 Gif sur Yvette (France)
Istituto Nazionale di Fisica Nucleare, Sezione di Trieste, I-34127 Trieste (Italy)
Istituto Nazionale di Fisica Nucleare, Sezione di Padova, I-35131 Padova (Italy)
Istituto Nazionale di Fisica Nucleare, Sezione di Pisa, I-56127 Pisa (Italy)
Istituto Nazionale di Fisica Nucleare, Sezione di Bari, I-70126 Bari (Italy)
W. W. Hansen Experimental Physics Laboratory, Kavli Institute for Particle Astrophysics and Cosmology, Department of Physics and SLAC National Accelerator Laboratory, Stanford University, Stanford, CA 94305 (United States)
Istituto Nazionale di Fisica Nucleare, Sezione di Torino, I-10125 Torino (Italy)
NASA Goddard Space Flight Center, Greenbelt, MD 20771 (United States)
Laboratoire Univers et Particules de Montpellier, Université Montpellier, CNRS/IN2P3, F-34095 Montpellier (France)
Laboratoire Leprince-Ringuet, École polytechnique, CNRS/IN2P3, F-91128 Palaiseau (France)
INAF-Istituto di Astrofisica Spaziale e Fisica Cosmica Milano, via E. Bassini 15, I-20133 Milano (Italy)

The spatial extension of a γ -ray source is an essential ingredient to determine its spectral properties, as well as its potential multiwavelength counterpart. The capability to spatially resolve γ -ray sources is greatly improved by the newly delivered Fermi -Large Area Telescope (LAT) Pass 8 event-level analysis, which provides a greater acceptance and an improved point-spread function, two crucial factors for the detection of extended sources. Here, we present a complete search for extended sources located within 7° from the Galactic plane, using 6 yr of Fermi -LAT data above 10 GeV. We find 46 extended sources and provide their morphological and spectral characteristics. This constitutes the first catalog of hard Fermi -LAT extended sources, named the Fermi Galactic Extended Source Catalog, which allows a thorough study of the properties of the Galactic plane in the sub-TeV domain.

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OSTI ID:: 22663401

Journal Information:: Astrophysical Journal, Vol. 843, Issue 2; Other Information: Country of input: International Atomic Energy Agency (IAEA); ISSN 0004-637X

Country of Publication:: United States

Language:: English

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