Table 2.
Best-fitting results for the joint fit to the XMM-Newton spectra of Ark 564 with the warm corona model Tbabs × (Nthcomp+CompTT). The chi-square of the fit is (χ2/d.o.f.) = 1.14 (2239/1960). All errors in the Tables are at the 90 percent confidence level unless otherwise indicated. A symbol means that the error pegged at the hard limit of the parameter range.
Model Comp | Parameter | Obs 1 | Obs 2 | Obs 3 | Obs 4 | Obs 5 | Obs 6 | Obs 7 | Obs 8 | Obs 9 | Obs 10 | Obs 11 | Obs 12 | Obs 13 |
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
zxipcf | NH (1022) | 24![]() |
162![]() |
49![]() |
142±15 | 65±14 | 23![]() |
23![]() |
45![]() |
64![]() |
67![]() |
65![]() |
57![]() |
24![]() |
log(ξ) | 0.01![]() |
1.7±0.7 | 1.6±0.5 | 2.1![]() |
1.9![]() |
1.1![]() |
0.9![]() |
0.9±0.6 | 1.9![]() |
2.2±0.2 | 2.1![]() |
1.9![]() |
0.01![]() |
|
fcover | 0.23![]() |
0.79![]() |
0.31±0.04 | 0.65±0.03 | 0.37±0.04 | 0.26±0.03 | 0.27±0.04 | 0.38±0.07 | 0.41±0.05 | 0.38±0.06 | 0.31![]() |
0.41±0.04 | 0.34![]() |
|
Zedge1 | Ec (keV) | 0.554±0.015 | 0.530±0.012 | 0.526±0.004 | 0.543±0.009 | 0.549±0.011 | 0.540±0.007 | 0.548±0.007 | 0.533±0.006 | 0.547±0.009 | 0.532±0.008 | 0.542±0.008 | 0.526±0.005 | 0.525±0.004 |
τ | 0.19±0.05 | 0.20±0.05 | 0.20±0.01 | 0.11±0.02 | 0.11±0.02 | 0.14±0.02 | 0.16±0.02 | 0.11±0.02 | 0.16±0.02 | 0.19±0.03 | 0.14±0.02 | 0.16±0.02 | 0.14±0.02 | |
Zedge2 | Ec (keV) | 0.727±0.019 | 0.719±0.015 | 0.699±0.005 | 0.714±0.017 | 0.708±0.012 | 0.714±0.007 | 0.724±0.008 | 0.715±0.009 | 0.702±0.010 | 0.687±0.014 | 0.704![]() |
0.707±0.007 | 0.707±0.006 |
τ | 0.15±0.04 | 0.16±0.05 | 0.14±0.01 | 0.07±0.02 | 0.11±0.02 | 0.14±0.02 | 0.14±0.02 | 0.10±0.02 | 0.16±0.02 | 0.13±0.02 | 0.10±0.02 | 0.14±0.01 | 0.12±0.01 | |
Zedge3 | Ec (keV) | 1.17![]() |
1.0![]() |
1.14±0.03 | 1.20±0.03 | 1.21±0.03 | 1.17±0.09 | 1.19±0.08 | 1.13±0.03 | 1.14±0.05 | 1.11±0.02 | 1.16![]() |
1.17±0.02 | 1.18±0.02 |
τ | 0.034![]() |
0.029![]() |
0.038±0.010 | 0.043![]() |
0.045±0.013 | 0.017±0.012 | 0.022±0.014 | 0.044±0.012 | 0.048±0.016 | 0.082±0.016 | 0.021±0.016 | 0.068±0.010 | 0.070±0.010 | |
nthComp | Γ | 2.52±0.07 | 2.52±0.06 | 2.58±0.02 | 2.64±0.02 | 2.62±0.03 | 2.59±0.03 | 2.59±0.03 | 2.60±0.03 | 2.57±0.04 | 2.56±0.03 | 2.62±0.03 | 2.59±0.03 | 2.61±0.02 |
Norm (10−2) | 2.45![]() |
4.75![]() |
2.12![]() |
6.74![]() |
2.27![]() |
2.04![]() |
2.47![]() |
2.60![]() |
1.64![]() |
2.39![]() |
3.05![]() |
1.97![]() |
1.92![]() |
|
compTT | kTe (keV) | 0.157±0.014 | 0.160![]() |
0.145±0.004 | 0.153±0.006 | 0.152±0.004 | 0.143±0.002 | 0.144±0.002 | 0.152±0.007 | 0.149![]() |
0.152±0.007 | 0.148±0.006 | 0.150±0.004 | 0.152±0.004 |
τ | 40![]() |
28![]() |
46![]() |
100![]() |
56![]() |
100![]() |
100![]() |
40![]() |
100![]() |
100![]() |
100![]() |
55![]() |
46![]() |
|
Norm | 1.09![]() |
4.71![]() |
0.90![]() |
0.99![]() |
0.65±0.22 | 0.43![]() |
0.61![]() |
0.92±0.19 | 0.39![]() |
0.48![]() |
0.60![]() |
0.60![]() |
0.71±0.13 |
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