PoS - Proceedings of Science
Volume 395 - 37th International Cosmic Ray Conference (ICRC2021) - GAI - Gamma Ray Indirect
A 3D Likelihood Analysis Tool for LHAASO-KM2A data
X. Huang*, K. Duan  on behalf of the LHAASO Collaboration
Full text: pdf
Pre-published on: July 07, 2021
Published on: March 18, 2022
The square kilometer array (KM2A) is the main array of the Large High Altitude Air Shower
Observatory (LHAASO), which is the most sensitive gamma-ray detector for energies above a few
tens of TeV. We are developing a software pipeline based on the experimental data, Monte-Carlo
simulations and the pointing track of the arrays. The pipeline is able to perform 3D (sky images at
different energies) fits of KM2A data, similar to those used for Fermi-LAT and DAMPE gamma-ray
analysis. This 3D likelihood analysis could fit source models of arbitrary morphology to the
sky images, and get energy spectra information and detection significances simultaneously. The
analysis with this software could give consistent results with those using traditional method.
DOI: https://doi.org/10.22323/1.395.0769
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