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Table 2
Parameters of down-scaling 2006 spectra to the 2021d55.6 spectrum.
| 2006: | d39.7 | d54 | d66.9 |
|---|---|---|---|
| Only scaling | |||
| Scaling factor | 0.60 | 0.34 | 0.40 |
 |
10.15 | 47.14 | 7.80 |
| BB-ratio | |||
| Teff(1)/105 K | 5.00 | 5.00 | 5.00 |
| Teff(2)/105 K | 5.21 | 5.43 | 5.38 |
| Scaling Factor | 1.00 | 1.00 | 1.00 |
 |
7.37 | 25.20 | 4.67 |
| BB-ratio + scaling | |||
| Teff(1)/105 K | 5.61 | 4.60 | 4.24 |
| Teff(2)/105 K | 6.50 | 5.60 | 5.15 |
| Scaling Factor | 2.89 | 4.45 | 5.61 |
 |
5.12 | 14.27 | 2.57 |
| Neutral + ionised absorption (no scaling); Fig. 9 left | |||
| ΔΝΗ/1021 cm−2 | 0.34 | 0.68 | 0.76 |
| Δ O I edge | −0.12 | 3.28 | 2.39 |
| ΔΝX (O VII)/1018 cm−2 | 5.00 | 5.60 | 4.90 |
| ΔΝΧ (N VII)/1018 cm−2 | 6.50 | 6.70 | 2.30 |
| ΔΝΧ (N VI)/1018 cm−2 | 2.30 | 2.60 | 2.80 |
| Scaling Factor | 1.00 | 1.00 | 1.00 |
 |
2.38 | 5.08 | 3.68 |
| Neutral + ionised absorption + BB-ratio; Fig. 9 right | |||
| ΔΝΗ/1021 cm−2 | 0.42 | 0.35 | 0.01 |
| Δ O I edge | −0.08 | 5.19 | 44.9 |
| ΔΝX (O VII)/1018 cm−2 | 5.10 | 5.00 | 3.50 |
| ΔΝX (N VII)/1018 cm−2 | 6.80 | 5.60 | −0.20 |
| ΔΝX (N VI)/1018 cm−2 | 2.50 | 2.10 | 2.30 |
| Teff(1)/105K | 6.54 | 5.46 | 4.90 |
| Teff(2)/105 K | 6.50 | 5.60 | 5.15 |
| Scaling Factor | 1.00 | 1.00 | 1.00 |
 |
2.36 | 4.48 | 1.94 |
| Neutral + ionised absorption + BB-ratio + scaling | |||
| ΔΝΗ/1021 cm−2 | 0.41 | 0.35 | 0.01 |
| Δ O I edge | −0.08 | 5.20 | 57.9 |
| ΔΝΧ (O VII)/1018 cm−2 | 5.20 | 4.90 | 3.50 |
| ΔΝΧ (N VII)/1018 cm−2 | 6.80 | 5.60 | −0.21 |
| ΔΝX (N VI)/1018 cm−2 | 2.50 | 2.10 | 2.30 |
| Teff(1)/105 K | 6.54 | 5.46 | 4.90 |
| Teff(2)/105 K | 6.50 | 5.60 | 5.15 |
| Scaling Factor | 1.00 | 1.00 | 1.02 |
 |
2.36 | 4.48 | 1.94 |
Notes. A graphical illustration of 
can be seen in Fig. 10.
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