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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