Fig. 2.
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Spectral energy distribution of the LHAASO J2108+5157 source observed with LST-1. The green confidence band represents the best-fitting PL spectral model of LST-1 data and its statistical uncertainties. The blue confidence band shows a joint likelihood fit of the LST-1 data and LHAASO flux points with an ECPL spectral model. The ECPL spectral model was used to estimate the 95% confidence level ULs on the differential fluxes shown in all energy bins.
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