Table 1.
Results of the night-wise VHE gamma-ray spectral analysis for VER J0521+211.
| State | Epoch | Teff | Signif. | Model | F-test | Differential flux | Γ | β |
|---|---|---|---|---|---|---|---|---|
| at 300 GeV (×10−11) | ||||||||
| [MJD] | [h] | [σ] | [cm−2 s−1 TeV−1] | |||||
| MAGIC Collaboration (2020) | 56580-56627 | 4.50 | 30.47 | LP | – | 27.43 ± 0.51 | 2.69 ± 0.02 | −0.47 ± 0.07 |
| A | 58903.5-58905.5 | 2.43 | 38.45 | LP | 5.08 × 10−5 [∼4.8σ] | 5.12 ± 0.31 | 3.07 ± 0.08 | −1.47 ± 0.28 |
| B | 58905.5-58906.5 | 0.66 | 10.34 | PWL | 1.38 × 10−1 [∼1.2σ] | 0.02 ± 0.01 | 3.07 ± 0.08 | – |
| B | 58906.5-58907.5 | 0.65 | 11.58 | PWL | 6.95 × 10−2 [∼1.6σ] | 0.04 ± 0.01 | 3.05 ± 0.18 | – |
| C | 58907.5-58908.5 | 0.73 | 22.94 | LP | 1.25 × 10−5 [∼5.3σ] | 6.23 ± 0.64 | 3.35 ± 0.23 | −1.72 ± 0.54 |
| D | 58908.5-58909.5 | 0.72 | 30.46 | LP | 1.18 × 10−3 [∼3.0σ] | 11.10 ± 0.90 | 3.04 ± 0.12 | −0.88 ± 0.34 |
| – | 58909.5-58910.5 | 0.70 | 20.82 | PWL | 3.75 × 10−3 [∼2.5σ] | 0.22 ± 0.03 | 2.69 ± 0.10 | – |
Notes. Columns: (1) State; (2) Observation epoch; (3) Effective time; (4) Detection significance; (5) statistically preferred model; (6) F-test probability (and equivalent significance expressed in σ); (7) Differential flux at 300 GeV; (8) and (9) Spectral index and curvature. Best-fit parameters are reported for the observed spectrum, without taking into account EBL absorption due to the uncertain redshift.
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