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

2017/02/28 by The Fermi LAT Collaboration, M. Ackermann, M. Ajello +133 · 3 citations
Physics and Astronomy · #Astronomy #Astrophysics #Astrophysics and Cosmic Phenomena #Dark Matter and Cosmic Phenomena #Fermi Gamma-ray Space Telescope #Galactic plane #Galaxy #Gamma-ray bursts and supernovae #Geometry #Physics #Plane (geometry) #Telescope #astro-ph.HE

paper · pdf · doi:10.3847/1538-4357/aa775a

33 pages, 22 figures & 3 tables. Published by The Astrophysical Journal. Available on the Fermi Science Support Center (FSSC) together with the 3FHL catalog

openalex created_date 2017/02/17 · openalex publication_date 2017/07/10 · arxiv created 2018/04/11 · arxiv updated 2018/04/12 · openalex updated_date 2026/08/05

Abstract

Abstract 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.

Citations

• Primary particle acceleration above 100 TeV in the shell-type supernova remnant RX J1713.7-3946 with deep HESS observations
• New identification of the mixed-morphology supernova remnant G298.6−0.0 with possible gamma-ray association
• FERMILARGE AREA TELESCOPE OBSERVATIONS OF SUPERNOVA REMNANTS INTERACTING WITH MOLECULAR CLOUDS
• OBSERVATION OF SUPERNOVA REMNANT IC 443 WITH THE FERMI LARGE AREA TELESCOPE
• The Large-Sample Distribution of the Likelihood Ratio for Testing Composite Hypotheses
• Discovery of a new supernova remnant G150.3+4.5
• Detection of extended very-high-energy γ-ray emission towards the young stellar cluster Westerlund 2
• A new look at the statistical model identification
• Fermi Large Area Telescope Second Source Catalog
• SUMSS: A Wide-Field Radio Imaging Survey of the Southern Sky. I. Science Goals, Survey Design, and Instrumentation
• XMM-Newton observations of the supernova remnant IC 443

Cited by

• Cosmic Rays and Non-thermal Emission Induced by Accretion of Cool Gas onto the Galactic Disk
• Studying the nature of the unidentified gamma-ray source HESS J1841−055 with the MAGIC telescopes
• 2FHL J0826.1–4500: Discovery of a Possible Shock–Cloud Interaction on the Western Edge of the Vela Supernova Remnant