Table 1
Best-fit parameters from modeling of the spectra shown in Fig. 10.
| Region |  |
 |
 |
 |
 |
 |
O/H | Ne/H | Mg/H | Si/H | S/H | Fe/H | c(b) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| A |  |
 |
 |
 |
7.7 ± 0.4 | 0.109 ± 0.010 |  |
 |
 |
 |
… (c) |  |
1683.5 |
| A (d) |  |
 |
 |
 |
0.90 ± 0.06 | 1.25 ± 0.16 | 2000 (d) |  |
 |
 |
…(c) |  |
1699.0 |
| B |  |
 |
 |
 |
6.7 ± 0.9 | 0.084 ± 0.018 |  |
 |
 |
 |
< 1.1 |  |
1607.5 |
| B (d) |  |
 |
 |
 |
0.76 ± 0.14 | 0.9 ± 0.4 | 2000 (d) |  |
 |
 |
< 1100 | < 11 | 1620.4 |
| C |  |
 |
 |
 |
2.1 ± 0.5 | 0.28 ± 0.09 |  |
 |
 |
 |
<16 | < 0.12 | 1345.6 |
| C (d) |  |
 |
 |
 |
0.46 ± 0.04 | 1.6 ± 0.3 | 2000 (d) |  |
 |
 |
 |
< 13 | 1360.7 |
| D |  |
 |
 |
 |
2.1 ± 0.4 | 0.52 ± 0.11 |  |
 |
 |
 |
 |
<0.037 | 1561.6 |
| D (d) |  |
 |
 |
 |
0.509 ± 0.016 | 2.01 ± 0.16 | 2000 (d) |  |
 |
 |
 |
<3.0 | 1593.4 |
| E |  |
 |
 |
 |
0.949 ± 0.025 | 1.48 ± 0.08 |  |
 |
 |
 |
 |
 |
2687.2 |
| F |  |
 |
 |
 |
2.982 ± 0.008 | 3.34 ± 0.04 |  |
 |
 |
 |
 |
 |
3460.0 |
| G |  |
 |
 |
 |
0.46 ± 0.11 | 4.2 ± 2.2 |  |
 |
 |
 |
 |
 |
1811.2 |
| H |  |
 |
 |
 |
3.0 ± 0.3 | 0.40 ± 0.16 |  |
 |
 |
< 15 | <13 | <2.2 | 1773.4 |
| I |  |
 |
 |
 |
1.228 ± 0.014 | 2.48 ± 0.05 |  |
 |
 |
 |
 |
 |
2552.6 |
Notes. All errors and upper limits of fitted parameters were estimated using the built-in error command, and are given at a 1σ level. Uncertainties of derived quantities were estimated using Gaussian error propagation. The column C displays the combined Cash statistic of the best fit to source and background spectra. (aThis corresponds to the definition of EM in Xspec (see Eq. (2)), omitting the arbitrary factor 10−14. (b)The associated number of degrees of freedom is 1550 and 1551 for cases (i) and (ii), respectively. (c)Here, our fit was unable to provide any constraints within the allowed abundance range. (d)In these cases, the approach of fixing the oxygen abundance to a value of 2000 to represent pure ejecta emission (case ii), was found to provide a fit of comparable or slightly poorer quality to case (i).
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