Table 2
Best-fit parameters of the combined Swift spectra of ESO 243-49 HLX-1 in the 0.3−10 keV range using the following four models†: phabs*power-law, phabs*bbody, phabs*(bbody+power-law) and phabs*bmc.
| Parameter | Band-A | Band-B | Band-C | Band-D | Band-E | Band-F | Band-G | |
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| Hardness ratio | HR | >1 | 0.5−1 | 0.25−0.5 | 0.13−0.25 | 0.07−0.13 | 0.03−0.07 | <0.03 |
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| Model | ||||||||
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| phabs | NH | 5.1 ± 0.1 | 5.2 ± 0.2 | 5.1 ± 0.1 | 5.1 ± 0.1 | 5.2 ± 0.1 | 5.1 ± 0.1 | 5.05 ± 0.08 |
| Power-law | Γpow | 1.4 ± 0.1 | 1.6 ± 0.2 | 1.9 ± 0.2 | 2.4 ± 0.1 | 2.6 ± 0.2 | 2.8 ± 0.3 | 3.9 ± 0.4 |
| Npow †† | 0.24 ± 0.05 | 0.43 ± 0.02 | 0.97 ± 0.05 | 2.7 ± 0.4 | 3.04 ± 0.06 | 4.3 ± 0.1 | 6.2 ± 0.1 | |
| χ2 (d.o.f.) | 1.15 (138) | 1.1 (180) | 1.3 (209) | 1.5 (223) | 2.6 (250) | 3.2 (93) | 2.1 (219) | |
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| phabs | NH | 5.0 ± 0.1 | 5.0 ± 0.2 | 4.9 ± 0.2 | 5.0 ± 0.1 | 5.0 ± 0.09 | 4.9 ± 0.2 | 5.03 ± 0.06 |
| Bbody | TBB | 280 ± 10 | 170 ± 5 | 85 ± 9 | 97 ± 6 | 110 ± 9 | 85 ± 7 | 120 ± 10 |
| NBB †† | 0.53 ± 0.04 | 0.9 ± 0.3 | 2.1 ± 0.5 | 3.1 ± 0.5 | 3.5 ± 0.4 | 4.1 ± 0.5 | 5.0 ± 0.3 | |
| χ2 (d.o.f.) | 6.1 (138) | 4.5 (180) | 3.8 (209) | 2.56 (223) | 1.4 (250) | 1.2 (93) | 1.1 (219) | |
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| phabs | N H | 5.1 ± 0.1 | 5.1 ± 0.1 | 5.1 ± 0.08 | 5.1 ± 0.1 | 5.2 ± 0.2 | 5.1 ± 0.1 | 5.08 ± 0.09 |
| Bbody | T BB | 300 ± 10 | 180 ± 9 | 90 ± 6 | 100 ± 20 | 120 ± 8 | 92 ± 5 | 110 ± 8 |
| N BB †† | 0.34 ± 0.05 | 0.7 ± 0.2 | 1.8 ± 0.6 | 2.6 ± 0.4 | 4.3 ± 0.5 | 4.9 ± 0.6 | 5.0 ± 0.2 | |
| Power-law | Γpow | 1.3 ± 0.2 | 1.7 ± 0.3 | 1.8 ± 0.1 | 2.3 ± 0.2 | 2.4 ± 0.2 | 2.6 ± 0.1 | 2.9 ± 0.3 |
| N pow †† | 0.82 ± 0.03 | 0.65 ± 0.03 | 0.48 ± 0.09 | 0.39 ± 0.07 | 0.4 ± 0.4 | 0.67 ± 0.02 | 0.52 ± 0.03 | |
| χ2 (d.o.f.) | 1.24 (136) | 1.18 (178) | 1.24 (207) | 1.23 (221) | 1.26 (248) | 1.19 (91) | 1.14 (217) | |
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| phabs | N H | 5.0 ± 0.1 | 5.0 ± 0.1 | 4.9 ± 0.1 | 5.0 ± 0.1 | 5.0 ± 0.1 | 4.9 ± 0.1 | 5.02 ± 0.04 |
| bmc | Γbmc | 1.6 ± 0.2 | 1.76 ± 0.09 | 2.01 ± 0.05 | 2.68 ± 0.08 | 2.8 ± 0.1 | 2.96 ± 0.09 | 3.0 ± 0.1 |
| T s | 54 ± 9 | 61 ± 8 | 52 ± 9 | 139 ± 8 | 142 ± 10 | 105 ± 9 | 130 ± 10 | |
| log A | 0.10 ± 0.04 | 0.17 ± 0.05 | 1.1 ± 0.3 | –1.09 ± 0.05 | –1.22 ± 0.09 | –1.06 ± 0.05 | –0.7 ± 0.3 | |
| N bmc †† | 0.36 ± 0.09 | 0.6 ± 0.2 | 0.98 ± 0.07 | 2.5 ± 0.3 | 3.08 ± 0.06 | 4.03 ± 0.05 | 5.2 ± 0.1 | |
| χ2 (d.o.f.) | 0.86 (136) | 0.89 (178) | 0.96 (207) | 0.93 (221) | 1.03 (248) | 0.79 (91) | 1.14 (217) | |
Notes. NH is the column density for the neutral absorber, in units of 1020 cm-2 (see details in the text). TBB and Ts are the temperatures of the blackbody and seed photon components, respectively (in eV). Γpow and Γbmc are the indices of the power-law and bmc, respectively.
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