Investigating Fermi-LAT data to find gev gamma-ray counterparts of new candidate radio supernova remnants detected in the GLEAM survey

Date

2024-9-02

Author

Meşe, Berfin Mina

Metadata

Show full item record

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Item Usage Stats

136
views

13
downloads

Cite This

To detect gamma-ray counterparts of the radio candidate supernova remnants (SNRs) identified by the Galactic and Extra-galactic All-sky Murchison Widefield Array (MWA) survey, we analyzed 14 years of Fermi-LAT data in the energy range of 1 - 300 GeV. The MWA survey has cataloged 27 new candidate radio SNRs within the longitude ranges 345 ◦ < l < 60 ◦ and 180 ◦ < l < 240 ◦ . We successfully detected gamma-ray counterparts for three of these candidates: G18.9−1.2, G23.1+0.1, and G28.3+0.2, with significance levels of approximately ∼10σ, ∼15σ, and ∼12σ, respectively. Our analysis also led to the identification of new optimal positions for these SNRs, which align well with the locations of their respective counterparts observed in the GLEAM survey. No extended gamma-ray emission was detected for any of these SNRs; instead, their gamma-ray emissions are best described as point sources.

Subject Keywords

gamma-rays, ISM, Radio continuum

URI

https://hdl.handle.net/11511/120049

Collections

Graduate School of Natural and Applied Sciences, Thesis