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

TL;DR

This paper applies MST clustering to 6.3 years of Fermi-LAT gamma-ray data above 10 GeV, detecting 19 new clusters coinciding with known BL Lac objects, suggesting potential gamma-ray emission associations.

Contribution

It introduces the use of MST clustering for high-energy gamma-ray sky analysis and reports new potential associations with BL Lac objects.

Findings

Detected 19 new gamma-ray clusters matching BL Lac positions

Validated MST clustering as effective for high-energy gamma-ray source detection

Provided properties summary of identified sources

Abstract

In this paper we show an application of the Minimum Spanning Tree (MST) clustering method to the high-energy gamma-ray sky observed at energies higher than 10 GeV in 6.3 years by the Fermi-Large Area Telescope. We report the detection of 19 new high-energy gamma-ray clusters with good selection parameters whose centroid coordinates were found matching the positions of known BL Lac objects in the 5th Edition of the Roma-BZCAT catalogue. A brief summary of the properties of these sources is presented.