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Table 8.

Results of the RGS spectral analysis.

obsida kT Rb ϵ EW FXc

(eV) (km) (eV)
(A) 86(5)
(B)
(C)
(D)
2012
201 92(3)
301
401
501 < 60

Old
New 4.9(5)

Notes. Errors are 1σ confidence levels. The model fitted to the data in XSPEC is tbabs(bbody-gauss). The RGS1/2 spectra are fitted simultaneously in each epoch. The FWHM of the feature, σ = 100 eV, and the column density, NH = 2.4 × 1020 cm−2, are held fixed during spectral fitting. The chi-squared values are within χ2 ∼ 50−80, for 135 degrees of freedom (NHP ∼ 100%).

(a)

The observations are labelled as in Tables 1 and 2.

(b)

The radiation radius at infinity is computed for a source distance of d ≡ d300 = 300 pc.

(c)

The unabsorbed model flux is in units of 10−12 erg s−1 cm−2 in energy band 0.2–12 keV.

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