Speaker
Description
Microquasars are a subclass of X-ray binaries that host relativistic jets and are considered potential Galactic emitters of very-high-energy (VHE; 0.1–100 TeV) gamma rays. Based on the mass of the companion star, they are categorized into high-mass and low-mass systems, with the latter remaining relatively unexplored in the TeV regime. GRS 1915+105 is one of the most well-known low-mass microquasars, known for its superluminal jets, making it a promising target for VHE studies.
In this work, we analyze approximately 2,886 days of data collected by the High-Altitude Water Cherenkov (HAWC) Observatory to investigate gamma-ray emission in the region surrounding GRS 1915+105. Located near the Galactic plane, this region contains multiple potential counterparts, making source identification challenging. To address this, the analysis accounts for nearby sources and diffuse background contributions and explores a range of morphological and spectral models to characterize the emission. We identify three gamma-ray source candidates in the GRS 1915+105 region and examine their spatial and spectral properties. Among them, one source is spatially associated with GRS 1915+105. We present preliminary results from these analyses and discuss possible interpretations of the observed emission in the context of particle acceleration and radiation processes in low-mass microquasar environments.
