Table A.3

XSPEC model components, best-fit parameters, and 3− 20 keV model fluxes for Cir X-1 during OBS 1 and OBS 2 corresponding to the orbital phase intervals 0.0486 ≤ ϕ ≤ 0.0498 and 0.1104 ≤ ϕ ≤ 0.1112, respectively (according to the ephemeris of Nicolson 2007).

Component Parameter OBS 1 OBS 2
(0.0486 ≤ ϕ ≤ 0.0498) (0.1104 ≤ ϕ ≤ 0.1112)
DiskBB Tin [keV] 1.059*
Norm (1.914) × 1012*
Bbody kT [keV]
Norm
Pcfabs NH [ × 1022]
CvrFract
Gaussian ELine [keV]
σ [keV] 0.1
Norm
(NDF) 1.07 (34) 1.22 (36)
Model flux [erg cm−2 s−1] 2.722 × 10−10 1.912 × 10−10

Notes. As discussed in the text, an additional Wabs component (with equivalent hydrogen column density fixed to NH = 1.59 × 1022 cm−2) was used tomodel the effects of interstellar absorption. Parameters marked by * are fixed to the best-fitting values from the third observation (see Table A.2). The value of the Gaussian σ parameter (marked by a † symbol) was also fixed. The parameter errors correspond to a Δχ2 of 2.71.

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