Table A.2
Spectral parameters for Cir X-1 during OBS 3 corresponding to the orbital phase interval 0.1718 ≤ ϕ ≤ 0.1725 (according to the ephemeris of Nicolson 2007).
| Component | Parameter | OBS 3A | OBS 3B | OBS 3C | OBS 3D |
|---|---|---|---|---|---|
| DiskBB | Tin [keV] |  |
Joint fit | ||
| Norm |  |
||||
| Bbody | kT [keV] |  |
Joint fit | ||
| Norm |  |
 |
 |
 |
|
| Pcfabs | NH [ × 1022] |  |
 |
 |
 |
| CvrFract |  |
 |
 |
 |
|
 (NDF) |
1.27 (145) | Joint fit | |||
| Model flux | [erg cm−2 s−1] | 6.121 × 10−10 | 5.512 × 10−10 | 3.822 × 10−10 | 2.515 × 10−10 |
Notes. XSPEC model components, best-fit parameters, and 3− 20 keV model fluxes are shown for the four separate sub-intervals illustrated in Fig. 2 in order of decreasing model flux. As discussed in the text, an additional Wabs component (with equivalent hydrogen column density fixed to NH = 1.59 × 1022 cm−2) was used to model the effects of interstellar absorption. Jointly fitted parameters assume the values quoted for OBS 3A. The parameter errors correspond to a Δχ2 of 2.71.
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