Table 2.
Chandra stowed background best-fit model parameters.
| Best-fit parameters of the continuum components | ||||
|---|---|---|---|---|
| Faint (bknpower) | Very faint (powerlaw) | |||
| Parameters | ACIS-I | ACIS-S | ACIS-I | ACIS-S |
| Γ | 2.386 | 2.386 | 0.349 | 0.349 |
| Ebreak (keV) | 0.692 | 0.692 | – | – |
| ΔΓ | 0.418 | 0.418 | – | – |
| norm | 0.104 | 0.104 | 0.194 | 0.194 |
| Summary of the instrumental lines | ||||
| ACIS-I | ACIS-S | |||
| Energy (keV) | element | Energy (keV) | element | |
| 0.529 | – | – | – | |
| 1.490 | Al Kα | 1.490 | Al Kα | |
| 1.786 | Si Kα | 1.786 | Si Kα | |
| 2.141* | Au Mα1/Mα2 | 2.142* | Au Mα1/Mα2 | |
| 2.6** | – | – | – | |
| 7.478 | Ni Kα | 7.478 | Ni Kα | |
| 8.3* | Ni Kβ/Au L1 | – | – | |
| 9.74* | Au Lα1/Lα2 | 9.740* | Au Lα1/Lα2 | |
| – | – | 9.755* | Au Lα1/Lα2 | |
Notes. Summary of the ACIS-I and ACIS-S Stowed Background Data: Best-fit parameters of the continuum emission components and summary of instrumental lines, used as initial parameters for the automatic background fitting routine. Line energies with * indicate uncertainty in the element or type, represented by closest reported lines, ** indicates an undocumented line. These parameters translate to XSPEC models as powerlaw or bknpower with the added Gaussians as gauss.
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