A new flaring high energy gamma-ray source

TL;DR

This paper reports the discovery of a new gamma-ray source detected by Fermi-LAT, showing increased activity in 2012, potentially linked to a blazar, using a novel detection algorithm based on the Minimal Spanning Tree.

Contribution

It introduces a new gamma-ray source detection method utilizing the Minimal Spanning Tree algorithm, leading to the identification of a previously unreported source.

Findings

Detected a new gamma-ray source with increased activity in 2012

Potential association with a blazar candidate NVSS J141828+354250

Demonstrated effectiveness of the MST-based detection method

Abstract

We report the detection of a new gamma-ray source in the Fermi-LAT sky using a source detection tool based on the Minimal Spanning Tree algorithm. The source, not reported in previous LAT catalogues but very recently observed in the X-rays and optical bands, is characterized by an increasing gamma-ray activity in 2012 June-September, reaching a weekly peak flux of (3.3+-0.6)*10^-7 photons cm^-2 s^-1. A search for a possible counterpart provides indication that it can be associated with the radio source NVSS J141828+354250 whose optical SDSS colours are typical of a blazar.