Application of the MST clustering to the high energy gamma-ray sky. III - New detections of gamma-ray emission from blazars

Abstract

We present the results of a photon cluster search in the gamma-ray sky observed by the Fermi Large Area Telescope, using the new Pass 8 dataset, at energies higher than 10 GeV. By means of the Minimum Spanning Tree (MST) algorithm, we found 25 clusters associated with catalogued blazars not previously known as gamma-ray emitters. The properties of these sources are discussed.

10 pages, 3 figures. Accepted for publication in Astrophysics & Space Science

References in corpus (8)

• The Third Catalog of Active Galactic Nuclei Detected by the Fermi Large Area Telescope
• The WISE Blazar-Like Radio-Loud Sources: An All-Sky Catalog Of Candidate Gamma-Ray Blazars
• The Extragalactic Gamma-ray Sky in the Fermi era
• 1WHSP: an IR-based sample of $\sim$1,000 VHE $\gamma$-ray blazar candidates
• A MST algorithm for source detection in gamma-ray images
• The low-frequency radio catalog of flat spectrum sources
• Application of the MST clustering to the high energy gamma-ray sky. I - New possible detection of high-energy gamma-ray emission associated with BL Lac objects
• Application of the MST clustering to the high energy gamma-ray sky. II - Possible detection of gamma-ray emission from blazar candidates in the 1WHSP sample

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• Application of the MST clustering to the high energy gamma-ray sky. II - Possible detection of gamma-ray emission from blazar candidates in the 1WHSP sample
• A MST catalogue of gamma-ray source candidates above 10 GeV and at Galactic latitudes higher than 20 degrees
• Minimum Spanning Tree cluster analysis of the LMC region above 10 GeV: detection of the SNRs N 49B and N 63A
• Two new high energy gamma-ray blazar candidates
• Application of the MST clustering to the high energy gamma-ray sky. IV - Blazar candidates found as possible counterparts of photon clusters
• Twelve-year update of the MST catalogue of gamma-ray source candidates above 10 GeV and at Galactic latitudes higher than 20 degrees
• High energy gamma-ray detection of supernova remnants in the Large Magellanic Cloud
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• New blazar candidates from the 9Y-MST catalogue detected at energies higher than 10 GeV