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
Bbody kT [keV] Joint fit
Pcfabs NH [ × 1022]
(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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