Table 7: Best-fitting spectral parameters for objects presenting a significant line detection (i.e. $P_{\rm prob} \geq 90\%$). GA: Gaussian profile. D (DISKLINE) and L (LAOR): profile line emitted by a relativistic accretion disk for a non-rotating BH (Fabian et al. 1989) and a maximally rotating BH (Laor 1991), respectively. The inclination of the disk is fixed to 30 deg. We assume q= -2 (emissivity law), (*) for PG 1402+261 q is let as a free parameter: |q|>3.0, and |q|=3.3+0.3-0.5, respectively for D and L. D: $R_{\rm in}=6~R_{\rm g}$ and $R_{\rm out}=1000~R_{\rm g}$. L: $R_{\rm in}=1.26~R_{\rm g}$, $R_{\rm out}=400~R_{\rm g}$.

Object		 Line Line parameters $P^{\rm line}_{\rm prob}$ $P^{\rm broad}_{\rm prob}$
    E $\sigma $ ${\it EW}$ ($\%$) ($\%$)
    (keV) (keV) (eV)    

I Zw1		 GA   $\rm 6.89^{+0.10}_{-0.15}$ 0.01 (f) 69 $\pm$ 35 99.2  
  GA   $\rm 6.58^{+0.25}_{-0.37}$ $\rm0.60^{+0.52}_{-0.30}$ $\rm 297^{+240}_{-141}$ >99.9 99.8
  D  6.78 $\pm$ 0.13   180 $\pm$ 68 >99.9  
  L  6.74$^\pm$0.11   240 $\pm$ 86 >99.9  


PG 0804+761

 GA  6.76 $\pm$ 0.06 0.01 (f) $\rm 140^{+78}_{-76}$ 98.5  
  GA   $\rm 6.67^{+0.31}_{-0.37}$ $\rm0.56^{+0.55}_{-0.22}$ $\rm 482^{+356}_{-243}$ 99.7 98.4
  D   $\rm 6.82^{+0.16}_{-0.27}$   $\rm 320^{+151}_{-156}$ 99.6  
  L   $\rm 6.71^{+0.27}_{-0.17}$   $\rm 400^{+174}_{-180}$ 99.8  

PG 0947+396		 GA   $\rm 6.45^{+0.07}_{-0.12}$ 0.01 (f) 92 $\pm$ 65 94.9  

PG 1048+342		 GA   $\rm 6.35^{+0.07}_{-0.10}$ 0.01 (f) 123 $\pm$ 64 98.3  

PG 1114+445		 GA   $\rm 6.40^{+0.02}_{-0.05}$ 0.01 (f) 125 $\pm$ 41 >99.9  

PG 1115+407		 GA   $\rm 7.20^{+0.13}_{-0.45}$ 0.01 (f) $\rm 157^{+115}_{-125}$ 92.4  

PG 1116+215		 GA   $\rm 7.23^{+0.07}_{-0.30}$ 0.01 (f) 194 $\pm$ 123 96.3  
  GA   $\rm 6.67^{+0.36}_{-0.41}$ $\rm0.72^{+0.48}_{-0.31}$ $\rm 885^{+563}_{-213}$ 99.8 99.7
  D   $\rm 7.10^{+0.14}_{-0.16}$   $\rm 517^{+251}_{-237}$ 99.8  
  L  7.06 $\pm$ 0.18   $\rm 636^{+306}_{-285}$ 99.9  

PG 1244+026		 GA   $\rm 6.66^{+0.09}_{-0.07}$ 0.01 (f) 222 $\pm$ 156 92.4  

PG 1309+355		 GA   $\rm 6.40^{+0.10}_{-0.12}$ 0.01 (f) $\rm 156^{+100}_{-104}$ 97.4  
  GA   $\rm 6.48^{+0.18}_{-0.23}$ $\rm0.21^{+0.24}_{-0.10}$ $\rm 300^{+206}_{-173}$ 98.7 94.1
  D   $\rm 6.54^{+0.10}_{-0.16}$   $\rm 373^{+187}_{-192}$ 99.8  
  L   $\rm 6.51^{+0.11}_{-0.15}$   458 $\pm$ 237 99.7  

PG 1402+261		 GA   $\rm 7.38^{+0.07}_{-0.10}$ 0.01 (f) $\rm 262^{+139}_{-140}$ 98.5  
  GA   $\rm 7.26^{+0.44}_{-0.51}$ $\rm 1.18^{+0.63}_{-0.40}$   $\rm 2040^{+1340}_{-880}$ >99.9 >99.9
  D(*)   $\rm 8.65^{+0.53}_{-0.37}$   $\rm 2000^{+700}_{-780}$ >99.9  
  L(*)   $\rm 8.51^{+0.33}_{-0.24}$   $\rm 4460^{+2050}_{-1820}$ >99.9  

Mrk 1383		 GA   $\rm 6.62^{+0.12}_{-0.10}$ 0.01 (f) $\rm 107^{+72}_{-81}$ 91.5  

PG 1512+370		 GA  6.51 $\pm$ 0.13 0.01 (f) 93 $\pm$ 64 94.4  


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