Speaker
Description
Standard data analysis at LHAASO typically employs a zenith angle cutoff of $< 50^{\circ}$, a constraint that excludes the scientifically rich Galactic Center (GC) region. Key targets within this region, such as the supermassive black hole Sgr A*, the Central Molecular Zone (CMZ), and the supernova remnant G0.9+0.1, are only observable at zenith angles exceeding $58^{\circ}$, where standard selection methods become suboptimal due to a sharp decline in detection efficiency. To overcome these limitations, we reanalyzed data within the $50^{\circ} – 60^{\circ}$ range and optimized the algorithms for energy reconstruction and data selection. The reliability of this optimized framework is presented through preliminary spectral measurements of the Crab Nebula—the standard reference source—and the TeV significant region around source LHAASO J1825-1337, demonstrating its enhanced performance for large-zenith-angle observations.
