Kavli Affiliate: Li Xin Li
| First 5 Authors: Zhen Cao, F. Aharonian, Axikegu, Y. X. Bai, Y. W. Bao
| Summary:
The KM2A is the largest sub-array of the Large High Altitude Air Shower
Observatory (LHAASO). It consists of 5216 electromagnetic particle detectors
(EDs) and 1188 muon detectors (MDs). The data recorded by the EDs and MDs are
used to reconstruct primary information of cosmic ray and gamma-ray showers.
This information is used for physical analysis in gamma-ray astronomy and
cosmic ray physics. To ensure the reliability of the LHAASO-KM2A data, a
three-level quality control system has been established. It is used to monitor
the status of detector units, stability of reconstructed parameters and the
performance of the array based on observations of the Crab Nebula and Moon
shadow. This paper will introduce the control system and its application on the
LHAASO-KM2A data collected from August 2021 to July 2023. During this period,
the pointing and angular resolution of the array were stable. From the
observations of the Moon shadow and Crab Nebula, the results achieved using the
two methods are consistent with each other. According to the observation of the
Crab Nebula at energies from 25 TeV to 100 TeV, the time averaged pointing
errors are estimated to be $-0.003^{circ} pm 0.005^{circ}$ and
$0.001^{circ} pm 0.006^{circ}$ in the R.A. and Dec directions, respectively.
| Search Query: ArXiv Query: search_query=au:”Li Xin Li”&id_list=&start=0&max_results=3