A MST catalogue of gamma-ray source candidates above 10 GeV and at Galactic latitudes higher than 20 degrees

Abstract

We describe a catalogue of gamma-ray source candidates, selected using the Minimum Spanning Tree (MST) algorithm on the 9-years Fermi-LAT sky (Pass 8) at energies higher than 10 GeV. The extragalactic sky at absolute Galactic latitudes above 20 degrees has been investigated using rather restrictive selection criteria, resulting in a total sample of 1342 sources. Of these, 249 are new detections, not previously associated with gamma-ray catalogues. A large fraction of them have interesting counterparts, most likely blazars. In this paper the main results on the catalogue selection and search of counterparts are reported.

arXiv comment18 pages, 10 figures. Accepted for publication in Astronomy & Astrophysics

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• The Open Universe VOU-Blazars tool
• Beyond two-point statistics: using the minimum spanning tree as a tool for cosmology
• 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
• Multi-band optical variability of a newly discovered twelve blazars sample from 2013-2019
• Search for $\gamma$-ray emission from SNRs in the Large Magellanic Cloud: a new cluster analysis at energies above 4 GeV
• Detection of new very-high-energy sources outside the galactic plane in the Fermi-LAT data
• New blazar candidates from the 9Y-MST catalogue detected at energies higher than 10 GeV
• A blind search for intraday gamma-ray transients with Fermi-LAT: Detections of GRB and solar emissions