Prospects for gamma-ray emission from magnetar regions in CTAO observations

TL;DR

This paper evaluates the potential for the Cherenkov Telescope Array Observatory (CTAO) to detect gamma-ray emissions from three magnetar regions, demonstrating that CTAO can significantly improve detection accuracy and speed compared to current instruments.

Contribution

The study provides the first detailed assessment of CTAO's capability to observe gamma-ray emissions from specific magnetar regions, highlighting rapid detection prospects.

Findings

CTAO can detect gamma-ray emissions from magnetar regions within five hours.

Detection significance exceeds 10 sigma for CXOU J171405.7-31031 and 30 sigma for Swift J1834-0846.

Expected flux measurement errors will be substantially lower than current observations.

Abstract

Recent multi-wavelength observations have highlighted magnetars as significant sources of cosmic rays, particularly through their gamma-ray emissions. This study examines three magnetar regions - CXOU J171405.7-31031, Swift J1834-0846, and SGR 1806-20 - known for emitting detectable electromagnetic signals. We assess the detectability of these regions using the upcoming Cherenkov Telescope Array Observatory (CTAO) by conducting an ON/OFF spectral analysis and compare the expected results with existing observations. Our findings indicate that CTAO will detect gamma-ray emissions from these three magnetar regions with significantly reduced emission flux errors compared to current instruments. In special, the study shows that the CXOUJ1714-3810 and SwiftJ1834-0846 magnetar regions can be observed by the full southern and northern CTAO arrays in just five hours of observation, with mean significances above $10 \,\sigma$ and $30 \,\sigma$, respectively. This paper discusses the regions analyzed, presents key results, and concludes with insights drawn from the study.