Table 1
Results of the global fitting using models of the type tbabs(ism) × ∑ vapeci.
| HD 34816 | HD 35468 | HD 36512 | HD 36960 | HD 38771∗ | HD 44743 | HD 52089 | HD 63922 | HD 79351 | HD 144217 | HD 158926 | |
|
|
|||||||||||
| k T 1 | 0.186 ± 0.004 | 0.172 ± 0.004 | 0.116 ± 0.008 | 0.081 ± 0.001 | 0.215 ± 0.010 | 0.197 ± 0.001 | 0.199 ± 0.002 | 0.190 ± 0.002 | 0.223 ± 0.016 | 0.188 ± 0.003 | 0.174 ± 0.006 |
| nor m 1 | 8.63 ± 0.42 | 2.91 ± 0.10 | 19.8 ± 3.7 | 13.6 ± 0.78 | 46.5 ± 4.3 | 7.66 ± 0.28 | 9.93 ± 0.40 | 13.3 ± 0.5 | 4.07 ± 0.23 | 27.6 ± 1.21 | 5.37 ± 0.40 |
| k T 2 | 0.41 ± 0.07 | 0.59 ± 0.03 | 0.291 ± 0.004 | 0.459 ± 0.015 | 0.52 ± 0.02 | 0.558 ± 0.006 | 0.579 ± 0.004 | 0.488 ± 0.017 | 0.74 ± 0.02 | 0.481 ± 0.019 | 0.48 ± 0.06 |
| nor m 2 | 0.46 ± 0.30 | 0.19 ± 0.02 | 7.00 ± 0.55 | 1.20 ± 0.04 | 7.30 ± 0.82 | 1.91 ± 0.05 | 5.78 ± 0.13 | 1.78 ± 0.13 | 3.73 ± 0.09 | 4.18 ± 0.35 | 0.43 ± 0.09 |
| k T 3 | 2.50 ± 0.08 | 1.60 ± 0.03 | 4.4 ± 6.2 | ||||||||
| nor m 3 | 2.85 ± 0.07 | 3.73 ± 0.09 | 0.32 ± 0.10 | ||||||||
 (d.o.f.) |
1.39(454) | 1.04(463) | 1.31 (476) | 1.35 (463) | 1.08 (521) | 1.54 (1414) | 1.44 (1139) | 1.21 (798) | 1.40 (1020) | 1.20 (377) | 1.12 (312) |
| A C | 0.61 ± 0.16 | 1.69 ± 0.16 | 1.26 ± 0.13 | 1.61 ± 0.35 | |||||||
| A N | 1.07 ± 0.13 | 1.03 ± 0.17 | 1.05 ± 0.33 | 1.27 ± 0.09 | 2.28 ± 0.15 | 1.21 ± 0.11 | |||||
| A O | 0.54 ± 0.03 | 0.45 ± 0.03 | 0.97 ± 0.11 | 2.74 ± 0.15 | 0.33 ± 0.03 | 0.78 ± 0.03 | 0.76 ± 0.03 | 0.69 ± 0.03 | 0.34 ± 0.03 | 0.78 ± 0.04 | 0.74 ± 0.07 |
| A N / A C | 1.69 ± 0.52 | 0.75 ± 0.09 | 1.81 ± 0.22 | ||||||||
| A N / A O | 1.98 ± 0.26 | 1.06 ± 0.21 | 3.18 ± 1.04 | 1.62 ± 0.13 | 3.00 ± 0.23 | 1.75 ± 0.18 | |||||
| A Ne | 1.41 ± 0.12 | 5.40 ± 0.32 | 0.65 ± 0.07 | 1.79 ± 0.08 | 1.67 ± 0.07 | 1.29 ± 0.06 | 1.99 ± 0.42 | 1.73 ± 0.10 | |||
| A Fe | 0.83 ± 0.06 | 0.40 ± 0.04 | 1.00 ± 0.03 | 0.85 ± 0.02 | 0.87 ± 0.04 | 0.78 ± 0.04 | 0.93 ± 0.06 | ||||
| A O / A Fe | 1.17 ± 0.16 | 0.83 ± 0.11 | 0.78 ± 0.04 | 0.89 ± 0.04 | 0.79 ± 0.05 | 0.44 ± 0.04 | 0.84 ± 0.07 | ||||
|
0.42 ± 0.02 | 0.135 ± 0.003 | 1.08 ± 0.03 | 0.83 ± 0.06 | 2.10 ± 0.06 | 0.926 ± 0.005 | 1.80 ± 0.01 | 0.788 ± 0.006 | 1.037 ± 0.007 | 1.47 ± 0.02 | 0.343 ± 0.010 |
| log(LX/LBOL) | −7.24 ± 0.02 | −8.48 ± 0.01 | −6.77 ± 0.01 | −6.76 ± 0.03 | −7.26 ± 0.01 | −7.597 ± 0.002 | −7.421 ± 0.002 | −7.044 ± 0.003 | −6.767 ± 0.003 | −7.38 ± 0.01 | −8.21 ± 0.01 |
| eq. ROSAT c.r. | 0.134 | 0.095 | 0.397 | 0.176 | 0.326 | 0.341 | 0.537 | 0.091 | 0.102 | 0.142 | 0.178 |
Notes. Temperatures are in keV, normalisation factors in 10-4 cm-5, fluxes in the 0.5–10.0 keV energy band in 10-12 erg cm-2 s-1, abundances Ai in number, with respect to hydrogen, and with respect to solar values (Asplund et al. 2009). Errors, derived from the Xspec error command for parameters and from flux err for fluxes, correspond to 1σ uncertainties – if asymmetric, the larger value is given here. EPIC spectra were fitted above 0.25 keV and ACIS-S 0th order spectra above 0.35 keV. ∗ For HD 38771, there are three additional parameters: AMg = 0.44 ± 0.06, ASi = 0.52 ± 0.08, and the Gaussian smoothing (gsmooth, convolved to the thermal model) with σ = (1.23 ± 0.05) × 10-3 keV at 6 keV, corresponding to FWHM = 145 ± 6 km s-1. This smaller value, compared to individual line fits, may be explained by the grouping used for global fits, which blurs the line profiles.
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