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Table 1.

Fitting parameters of the VHE spectra during the highest-flux nights in 2016.

Time Flux (a) Fit model F0 Γ or α Ecut β Epeak(b) χ2/d.o.f
(10−10 cm−2 ⋅ s−1) (10−9 TeV−1 ⋅ cm−2 ⋅ s−1) (TeV) (TeV)
13th June (1) PL ... ... ... 34.0/10
02:15–04:37 (2) PL w/ cutoff ... ... 14.1/9
(MJD 57552.094 4.06 ± 0.13 (3) LogP ... 11.4/9
–57552.192) (4) LogP w/ cutoff +∞c 11.4/8
14th June (1) PL ... ... ... 35.3/10
02:07–03:35 (2) PL w/ cutoff ... ... 5.9/9
(MJD 57553.088 3.28 ± 0.13 (3) LogP ... 6.0/9
–57553.149) (4) LogP w/ cutoff 5.3/8
23:59 30th June (1) PL ... ... ... 85.4/10
–04:58 1st July (2) PL w/ cutoff ... ... 11.7/9
(MJD 57569.999 3.76 ± 0.08 (3) LogP ... 22.5/9
–57570.207) (4) LogP w/ cutoff +∞c 11.5/8

Notes. The functions of PL, PL w/ cutoff, LogP, and LogP w/ cutoff are defined in Appendix B as Eqs. (B.1)–(B.4), respectively. The normalization energy E0 is 0.3 TeV. The EBL absorption has been corrected with the model of Franceschini et al. (2008).

(a)

For an energy range E >  300 GeV.

(b)

Separate from the other parameters, only Epeak is determined by another fitting process by expressions with Epeak, namely, Eqs. (B.5) and (B.6).

(c)

Here +∞ means that the energy is higher than the fitting range and reaches the upper limit of the parameter.

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