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Table 4

Missing AGNs: best-fit models for the soft X-ray excess.

ID Γ KT Δχ2 Γ N H,z f d.o.f. Δχ2 P


BB ≡ PHA * ( zPOW + zBB ) PCF ≡ PHA * zPOW * zPCF

BB-PL as the best-fit model

65 0.987/314 91.4  ~ 0 1.171/314 33.6  ~ 0
71a 1.140/110 108 (*)
100 1.100/299 81.5  ~ 0 1.230/299 41.5  ~ 0
104 1.026/168 100.4  ~ 0 1.537/168 18.9  ~ 0
195a 1.140/210 68  ~0
241 0.764/100 15.3  ~0 0.810/100 10.7  ~0
275 1.082/556 323.0  ~0 1.171/556 273.5  ~0
329a 0.844/95 214.9 (*)

PCF-PL as the best-fit model

26 1.169/61 5.1 0.12 1.072/61 11.1  ~ 0
42 0.889/159 8.9  ~ 0 0.923/159 29.8 0.157
125 0.936/84 6.5  ~ 0 0.880/84 10.5  ~ 0
171  > 2 × 103 0.901/79 12.8  ~ 0 0.874/79 14.9  ~ 0
191 1.178/560 168.4  ~ 0 1.041/560 245  ~ 0
214 0.810/30 9.3  ~ 0 0.681/30 13.2  ~ 0

BB and/or PCF extra component could not be excleded

53 1.070/41 5.7 0.08 1.130/41  < 4 0.25
63  > 2 × 103 1.553/16  < 3 0.51 1.522/16  < 3 0.44
129 1.195/37 6.3 0.08 1.256/37  < 5 0.22
203  < 1 0.892/39  < 5 0.12 0.935/39  < 5 0.09
204 0.277/11  < 5 0.08 0.243/11  < 5 0.01
338a 0.985/61  < 5 0.45
357a 1.198/64  < 5 0.16

Notes. The table is divided into three parts: an additional black-body component was required to find the best-fit model, the addition of partial covering and, finally cases in which the low did not allow us to reject any of the components. KT is given in units of eV and the intrinsic equivalent hydrogen column in units of 1020 atoms cm-2. (a) The fit is insensitive to either the NH,z or f parameters of the PCF model. (b) The X-ray spectra could not fitted by the PCF model. (*) The soft excess is extremely strong, invalidating the use of an abosrbed PL fitting over the whole X-ray spectra. We could not analyse the X-ray spectra of the sources 15, 163, 324, 335, and 355 because of the small number of counts. Furthermore, the sources 111, 161, 189, 198, and 302 were not analysed using any of these models, because their hard X-ray spectra is dominated by background, reducing the detectability of their source counts.

(**)

Denotes a parameter that XSPEC could not calculated, with an error bar as preceise as 90 per cent confidence.

(†)

If the probability of the F-test is low (close to zero) then it is reasonable to add the extra model component.

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