Unidentified Fermi LAT Transients Near The Galactic Plane

TL;DR

This paper analyzes seven unidentified gamma-ray transients near the Galactic plane using Fermi LAT data, detecting significant emission in three cases and reviewing multiwavelength counterparts to understand their nature.

Contribution

It provides new detections of gamma-ray transients and assesses their possible counterparts, advancing understanding of Galactic gamma-ray sources.

Findings

Detected significant gamma-ray emission in 3 out of 7 sources

Failed to confirm previous transient detections in 4 sources

Reviewed multiwavelength data to identify potential counterparts

Abstract

The Fermi LAT has detected numerous transient gamma-ray sources near the Galactic plane, several of which have been shown to be located within our Galaxy. We present an analysis of LAT Pass 8 data of seven previously reported, but still unidentified transient gamma-ray sources located within 10{\deg} of the Galactic plane. We detect significant gamma-ray emission lasting several days for three of these sources: Fermi J0035+6131, Fermi J0905-3527, and Fermi J0910-5041. However, we were not able to detect the increase in gamma-ray emission that has previously been reported in the other four cases. We also review available multiwavelength data for the transients and discuss potential counterparts.