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

TL;DR

This paper presents a new gamma-ray source catalogue above 10 GeV derived from 9 years of Fermi-LAT data, identifying 1342 candidates with 249 new detections, many likely being blazars.

Contribution

The paper introduces a novel gamma-ray source catalogue using the MST algorithm on Fermi-LAT data, including new detections not previously catalogued.

Findings

1342 gamma-ray source candidates identified

249 new gamma-ray sources discovered

Many sources have likely blazar counterparts

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.