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Table 1.
Mean values for the spectral parameters.
| Direct estimates | Survival analysis | |
|---|---|---|
| Photon Index | 1.78 ± 0.01 (118/118) | – |
| Reflection | 0.68 ± 0.05 (106/118) | 0.69 ± 0.04 |
| Cut-off energy | 102 ± 16 keV (63/118) | 206 ± 38 |
Notes. As the cut-off energy distribution is highly skewed, often presenting large asymmetric error-bars the error approximation is unrealistic.
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