Table 1
Simultaneous fit to the EPIC-pn, MOS1, and MOS2 spectra of the entire observation and the time intervals displayed in the bottom panel of Fig. 5.
| Model | N H | Γ | kT | N mekal | log A | N BMC | F X | C MOS1 | C MOS2 |  /d.o.f.
|
|
|
|
|||||||||||
| Tot. | |||||||||||
| ph*BMC | 3.57 ± 0.17 | <2.5 |
|
– |
|
( )
× 10-3 |
5.6 | 1.05 ± 0.03 | 1.10 ± 0.02 | 1.04/312 | |
| ph*(mkl+pl) | 7.0 ± 0.3 | 1.66 ± 0.06 |
|
|
– | – | 5.7 | 1.04 ± 0.03 | 1.11 ± 0.03 | 1.14/312 | |
|
|
|||||||||||
| Spectrum “a” | |||||||||||
| ph*pl | 5.6 ± 0.3 | 1.63 ± 0.07 | – | – | – | – | 4.3 | 1.06 ± 0.04 | 1.17 ± 0.04 | 1.26/281 | |
| ph*BMC | 3.2 ± 0.2 | <2.5 |
|
– |
|
( )
× 10-3 |
4.3 |
|
1.17 ± 0.04 | 1.10/279 | |
| ph*(mkl+pl) | 6.2 ± 0.4 | 1.73 ± 0.08 |
|
|
– | – | 4.3 | 1.06 ± 0.04 | 1.18 ± 0.04 | 1.15/279 | |
|
|
|||||||||||
| Spectrum “b” | |||||||||||
| ph*pl |
|
1.8 ± 0.3 | – | – | – | – | 5.1 | 1.11 ± 0.13 | 1.12 ± 0.14 | 1.02/69 | |
| ph*BMC |
|
2.5 (fixed) | 1.2 ± 0.2 | – | 2.17 (fixed) | ( )
× 10-5 |
5.0 | 1.11 ± 0.12 | 1.13 ± 0.14 | 0.97/69 | |
|
|
|||||||||||
| Spectrum “c” | |||||||||||
| ph*pl |
|
1.1 ± 0.5 | – | – | – | – | 21.7 | 1.0 ± 0.2 | 1.0 ± 0.2 | 0.76/31 | |
| ph*BMC |
|
2.5 (fixed) |
|
– | 2.17 (fixed) | ( )
× 10-4 |
21.2 | 1.0 ± 0.2 | 1.0 ± 0.2 | 0.75/31 | |
|
|
|||||||||||
| Spectrum “d” | |||||||||||
| ph*pl |
|
1.1 ± 0.2 | – | – | – | – | 30.7 | 1.1 ± 0.1 | 1.1 ± 0.1 | 1.00/90 | |
| ph*BMC |
|
2.5 (fixed) |
|
– | 2.17 (fixed) | ( )
× 10-4 |
30.0 | 1.1 ± 0.1 | 1.1 ± 0.1 | 0.95/90 | |
|
|
|||||||||||
| Spectrum “e” | |||||||||||
| ph*pl | 7.8 ± 1.0 | 1.3 ± 0.2 | – | – | – | – | 13.5 | 1.1 ± 0.1 | 1.1 ± 0.1 | 0.89/105 | |
| ph*BMC |
|
2.5 (fixed) | 1.5 ± 0.2 | – | 2.17 (fixed) | ( )
× 10-4 |
13.1 | 1.1 ± 0.1 | 1.1 ± 0.1 | 0.89/105 | |
|
|
|||||||||||
| Spectrum “f” | |||||||||||
| ph*pl | 7.1 ± 0.5 | 1.8 ± 0.1 | – | – | – | – | 5.7 | 1.05 ± 0.06 | 1.12 ± 0.07 | 1.16/189 | |
| ph*BMC |
|
2.5 (fixed) | 1.15 ± 0.08 | – | 2.17 (fixed) | (9.5 ± 0.4) × 10-5 | 5.7 | 1.05 ± 0.06 | 1.12 ± 0.07 | 1.12/189 | |
Notes.We indicated above with “ph”, “mkl”, “BB”, and “pl” the phabs, mekal, blackbody, and power-law component of the spectral model used in xspec. In the BMC model α = Γ−1 is the energy spectral index, log A gives a measurement of the fraction of the Compton-reprocessed emission with respect to the directly observed blackbody emission, and NBMC can be used to estimate the size of the thermally emitting region (see also Sect. 4). We did not explicitly report the normalization of the power-law component in the ph*pl, as this parameter would not provide additional information beside the source flux already given in the fourth column on the right). CMOS1 and CMOS2 are the normalization constants introduced in the model to account for inter-calibration uncertainties between the EPIC cameras (C = 1 for the EPIC-pn). The absorption column density reported here is given in units of 1022 cm-2, kT in keV, and the flux in units of 10-12 erg/cm2/s (2–10 keV energy range, not corrected for absorption).
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