Swift-XRT Observations and Upper Limits at Five LHAASO Galactic Sources
Year: 2025
Type: article
Abstract: The detection of low-energy counterparts to gamma-ray sources is critical to understanding the nature of the astrophysical systems producing such high-energy emission. We report on Swift-XRT observations at five LHAASO gamma-ray sources with no known low-energy counterpart and scant previous X-ray observations. At four of the five LHAASO targets, we detect no significant X-ray point sources, while at 1LHAASO J1928+1813u we detect a single X-ray source that is likely related to X-ray emission from a local cool stellar system. These results suggest that many X-ray counterparts to LHAASO sources have X-ray flux below ≈10−13 erg s−1 cm−2, or have diffuse X-ray emission not visible in brief observations.
Source: Research Notes of the AAS
Authors: Amiri Walker, Ella Werre, Shaan Karim, Stephen DiKerby
Institution: Michigan State University
Language: English
Subfield: Nuclear and High Energy Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: hybrid
OpenAlex ID: W4409528734