Table 2
Parameters of the fits to XMM-Newton EPIC ring spectra with absorbed power-law models(*), all performed with χ2 fit statistics.
| Parameter | Units | Model 1 | Model 2 | Model 3 |
|---|---|---|---|---|
| NH | 1021 cm−2 |  |
 |
|
| NH,North | 1021 cm−2 |  |
||
| NH,South | 1021 cm−2 |  |
||
| γ |  |
4.0 | 4.0 | |
| Norm |  |
 |
 |
|
| (10−5 ph keV−1 cm−2 arcmin−2) | ||||
 |
0.9 (1258) | 0.9 (1259) | 0.9 (1257) | |
Notes. (*)Model const*tbabs(powerlaw), abundance=wilm in Xspec. Model 1: NH and power-law parameters allowed to vary. Model 2: power-law index fixed to 4.0. Model 3: separate absorption terms for the three northern and the three southern pointings. All parameter errors correspond to 90% confidence limits for 1 parameter.
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