H.E.S.S. detection and multi-wavelength study of the z ∼ 1 blazar PKS 0346−27

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Table 1.

Very high energy γ-ray spectral parameters for the detection night of 3 November 2021.

Analysis chain	E₀	N₀	Γ
	[TeV]	[10⁻¹⁰ cm ⁻²s⁻¹TeV]
CT1-4	0.150	3.3 ± 0.79(stat.) $_{- 1.7}^{+ 2.9}$ $^{+2.9}_{-1.7}$ (syst.)	6.6 ± 1.2 (stat.) ± 0.1(syst.)
CT5	0.150^a	2.4 ± 1.5(stat.) $_{- 1.3}^{+ 2.2}$ $^{+2.2}_{-1.3}$ (syst.)	6.8 ± 1.3 (stat.) ± 0.2 (syst.)

Notes.

^(a)

The decorrelation energy of CT5 analysis was found at its energy threshold. However, the correlation coefficient at this energy remains significantly large, indicating that the fit parameters are still strongly coupled and the decorrelation is not optimal. The same reference energy as CT1-4 analysis was chosen for CT5 analysis, to compare N₀ at the reference energy. The given reference energy is not the decorrelation energy implying larger statistical errors in the spectral parameters.

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