Speaker
Description
We present a search for periodic signals in the Galactic background region using LHAASO-KM2A data collected from the beginning of full-array operation in 2021 to August 2025. Using all valid-day observations in this period, we systematically organize the background signals in the Galactic plane and investigate their possible periodic behavior.
In this work, the Galactic region is divided into multiple subregions according to Galactic longitude. Time series are constructed for each subregion, and periodicity analyses are performed in a comparative framework to identify potential periodic components in the background signals. A key goal of this study is not only to search for possible periodic signatures, but also to examine whether any observed modulation may arise from detector-related effects rather than from astrophysical origins. For this purpose, cross-checks among different regions and systematic comparisons are carried out to test the reliability of the signals and to identify possible instrumental or operational biases.
This study provides a methodological basis for periodicity searches in long-term wide-field observations with LHAASO-KM2A.
