Table A.1.
Spectroscopy of the lowest luminosity state (EPIC pn, MOS1, and MOS2) with statistically acceptable models (see Sect. A and Sect. 4.1 for details and issues).
| Param. | Model 1 (d) | Model 2 (d) | Model 3 (d) | Model 4 (d) | Model 5 (d) | Model 6 (d) |
|---|---|---|---|---|---|---|
| NH (1022 cm−2) |
 |
 |
 |
 |
 |
 |
| ——————— Additional absorber ——————— | ||||||
| NH pcfabs (1022 cm−2) | − | − | − | − | − |
 |
| cov.fracpcfabs | − | − | − | − | − |
 |
| —————– Softer thermal component —————– | ||||||
| kTBB (keV) | − |
 |
− | − |
 |
− |
| normBB | − |
 |
− | − |
 |
− |
| RBB a (km) | − |
 |
− | − |
 |
− |
| kTAPEC (keV) |
 |
− |
 |
 |
− |
 |
| normAPEC (10−5 cm−5) |
 |
− |
 |
 |
− |
 |
| EMAPEC a (1054 cm−3) |
 |
− |
 |
 |
− |
 |
| UFsoft b (erg cm−2 s−1) |
 |
 |
 |
 |
 |
 |
| —————– Harder thermal component —————– | ||||||
| kTBB (keV) | − |
 |
− |
 |
− | − |
| normBB | − |
 |
− |
 |
− | − |
| RBB a (km) | − |
 |
− |
 |
− | − |
| kTAPEC (keV) | − | − |
 |
− | − | − |
| normAPEC (10−5 cm−5) | − | − |
 |
− | − | − |
| EMAPEC a (1054 cm−3) | − | − |
 |
− | − | − |
| UFhard b (erg cm−2 s−1) | − |
 |
 |
 |
− | − |
| ——————– Power law component ——————– | ||||||
| Γc |
 |
− | − | − |
 |
 |
| normpow (10−2) |
 |
− | − | − |
 |
 |
| UFpow b (erg cm−2 s−1) |
 |
− | − | − |
 |
 |
| UFtotal b (erg cm−2 s−1) |
 |
 |
 |
 |
 |
 |
| Ltotal a, b (erg s−1) | 9.0 × 1031 | 1.6 × 1033 | 7.2 × 1031 | 3.8 × 1032 | 6.0 × 1033 | 1.0 × 1033 |
| UFsoft/ UFtotal | 46% | 97% | 50% | 91% | 98% | 55% |
 /dof |
1.046/143 | 0.938/143 | 1.098/143 | 0.950/143 | 0.989/143 | 0.954/141 |
Notes.a A source distance of 2.2 kpc is assumed.
b All fluxes and luminosities are in the 0.5-10 keV energy range and are corrected for the absorption.
c Power-law photon index.
(d) The models, using the XSPEC synthax, are the following: TBABS * (APEC + PEGPWRL) (Model 1), TBABS * (BBODYRAD + BBODYRAD) (Model 2), TBABS * (APEC + APEC) (Model 3), TBABS * (APEC + BBODYRAD) (Model 4), TBABS * (BBODYRAD + PEGPWRL) (Model 5), and TBABS * PCFABS * (APEC + PEGPWRL) (Model 6).
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