Table 3
Spectral fitting results.
| Region | Excess counts(1) | Γ/kT(2) | Surface flux(3) |  (d.o.f.) |
|
|
||||
| M 62 | ||||
| Ring0 | 660.1 ± 43.3 | 8.9 ± 0.3 | 2.51 ± 0.42 | 1.2(504) |
| Ring1 | 897.4 ± 49.5 | 9.6 ± 0.1 | 2.18 ± 0.26 | |
| Ring2 | 1145.9 ± 48.1 | 9.8 ± 0.1 | 2.05 ± 0.20 | |
| Ring3 | 1175.2 ± 50.8 | 9.9 ± 0.1 | 1.82 ± 0.12 | |
| Ring4 | 1669.7 ± 58.3 | 9.6 ± 0.2 | 2.22 ± 0.19 | |
| Ring5 | 1750.0 ± 78.7 | 9.7 ± 0.1 | 2.18 ± 0.18 | |
| Ring6 | 850.1 ± 41.8 | 9.0 ± 0.4 | 1.91 ± 0.15 | |
| Ring7 | 223.9 ± 14.8 | 8.6 ± 0.5 | 2.18 ± 0.25 | |
| Ring8 | 326.5 ± 17.7 | 9.0 ± 0.6 | 2.13 ± 0.20 | |
| Outer | 1672.5 ± 74.8 | 0.40 ± 0.03 | 5.74 ± 0.37 | 1.3(99) |
|
|
||||
| NGC 6388 | ||||
| Ring0 | 264.9 ± 26.5 | 5.6 ± 1.2 | 6.65 ± 2.4 | 1.1(469) |
| Ring1 | 318.0 ± 37.8 | 6.8 ± 1.1 | 3.79 ± 1.3 | |
| Ring2 | 392.2 ± 38.1 | 7.0 ± 0.9 | 3.34 ± 0.91 | |
| Ring3 | 446.8 ± 37.0 | 6.6 ± 0.9 | 3.72 ± 0.98 | |
| Ring4 | 457.6 ± 29.6 | 7.1 ± 0.9 | 2.63 ± 0.66 | |
| Ring5 | 580.4 ± 46.2 | 6.9 ± 0.9 | 3.03 ± 0.71 | |
| Ring6 | 681.4 ± 46.6 | 7.4 ± 0.9 | 2.76 ± 0.61 | |
| Ring7 | 705.5 ± 55.4 | 7.1 ± 0.8 | 3.20 ± 0.64 | |
| Ring8 | 657.7 ± 45.6 | 7.3 ± 0.9 | 2.58 ± 0.59 | |
| Outer | 1966.9 ± 76.5 | 0.18 ± 0.02 | 8.25 ± 0.55 | 1.1(88) |
|
|
||||
| NGC 6541 | ||||
| Ring0 | 442.5 ± 47.3 | 8.9 ± 0.3 | 1.56 ± 0.19 | 1.4(451) |
| Ring1 | 730.2 ± 53.8 | 9.2 ± 0.2 | 1.42 ± 0.13 | |
| Ring2 | 917.3 ± 63.4 | 9.5 ± 0.1 | 1.34 ± 0.10 | |
| Ring3 | 769.7 ± 58.8 | 9.2 ± 0.2 | 1.39 ± 0.12 | |
| Ring4 | 437.4 ± 21.0 | 9.5 ± 0.1 | 1.20 ± 0.09 | |
| Ring5 | 547.5 ± 23.1 | 9.1 ± 0.1 | 1.47 ± 0.10 | |
| Ring6 | 450.1 ± 21.6 | 9.2 ± 0.2 | 1.38 ± 0.11 | |
| Ring7 | 367.1 ± 20.0 | 9.4 ± 0.2 | 1.25 ± 0.11 | |
| Ring8 | 345.0 ± 18.9 | 9.4 ± 0.2 | 1.25 ± 0.11 | |
| Outer | 1767.8 ± 81.0 | 0.17 ± 0.02 | 5.51 ± 0.39 | 0.9(67) |
|
|
||||
| M 80 | ||||
| Ring0 | 187.6 ± 24.6 | 2.5 ± 1.6 | 10.8 ± 8.0 | 1.4(567) |
| Ring1 | 210.6 ± 28.5 | 2.6 ± 1.4 | 6.9 ± 5.7 | |
| Ring2 | 291.6 ± 28.4 | 3.3 ± 0.6 | 3.1 ± 1.5 | |
| Ring3 | 360.6 ± 32.2 | 3.2 ± 0.5 | 3.9 ± 1.7 | |
| Ring4 | 432.2 ± 35.1 | 1.6 ± 0.9 | 16 ± 11 | |
| Ring5 | 538.8 ± 42.5 | 2.2 ± 0.5 | 8.1 ± 3.6 | |
| Ring6 | 626.3 ± 43.2 | 2.0 ± 0.6 | 10 ± 5.0 | |
| Ring7 | 673.4 ± 51.3 | 2.5 ± 0.4 | 6.0 ± 2.2 | |
| Ring8 | 711.8 ± 45.5 | 2.2 ± 0.4 | 9.4 ± 3.4 | |
| Outer | 2309.4 ± 79.0 | 0.42 ± 0.08 | 26.0 ± 2.5 | 1.2(182) |
Notes. The quoted uncertainties are 90% confidence intervals calculated by letting each free parameter vary. Therefore, parameter correlations are taken into account. (1) Total number of excess counts summed over all contributing CCDs in the energy bands 1–7 keV (Ring1–8) and 0.7–10.0 keV (Outer). (2) This column gives the photon index in the cases where an absorbed powerlaw spectrum was fitted (Ring1–8), or kT in units of keV for the combined Outer region. (3) Observed surface flux in units of 10-8 erg cm-2 s-1 sr-1 in the energy bands 1–7 keV (Ring1–8) and 0.7–10.0 keV (Outer).
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