PoS - Proceedings of Science
Volume 395 - 37th International Cosmic Ray Conference (ICRC2021) - GAI - Gamma Ray Indirect
Observation of gamma-ray emission from the Markarian 421 with the LHAASO-WCDA
R. Wang*, M. Zha and C. Feng
Full text: pdf
Pre-published on: July 14, 2021
Published on: March 18, 2022
The water Cherenkov detector array (WCDA), sub-array of Large High Altitude Air Shower Observatory (LHAASO), is highly sensitive to VHE gamma-ray and is dedicated to surveying the northern sky (100GeV to 30TeV). In this work, the TeV gamma ray emission in Mrk421 is monitored over period from 2019 July to 2020 February with the first detector array of WCDA. The significance and excess over background of this source are measured within this period and compared with the observation by the satellite-borne experiment Fermi in the GeV range. The evolution of the spectral energy distribution is also investigated by measuring spectral indices at two different flux levels.
DOI: https://doi.org/10.22323/1.395.0862
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