Table 11: Mean and standard deviation ( $\sigma$ ) of the photon index in the 0.3-2 keV and 2-5 keV energy ranges. NLG: Narrow Line Galaxies ( ${\it FWHM}<2000$ km s^-1), RQQ: radio-quiet quasars, and RLQ (radio-loud quasars).
Type 0.3-2 keV 2-5 keV

All objects 2.56 ( $\sigma$ :0.44) 1.99 ( $\sigma$ :0.31)

NLG 3.04 ( $\sigma$ :0.42) 2.37 ( $\sigma$ :0.11)

RQQ 2.43 ( $\sigma$ :0.35) 1.90 ( $\sigma$ :0.27)

RLQ 2.29 ( $\sigma$ :0.04) 1.74 ( $\sigma$ :0.03)

**Table 11:** Mean and standard deviation ( $\sigma$ ) of the photon index in the 0.3-2 keV and 2-5 keV energy ranges. NLG: Narrow Line Galaxies ( ${\it FWHM}<2000$ km s^-1), RQQ: radio-quiet quasars, and RLQ (radio-loud quasars).
Type	0.3-2 keV	2-5 keV
All objects	2.56 ( $\sigma$ :0.44)	1.99 ( $\sigma$ :0.31)
NLG	3.04 ( $\sigma$ :0.42)	2.37 ( $\sigma$ :0.11)
RQQ	2.43 ( $\sigma$ :0.35)	1.90 ( $\sigma$ :0.27)
RLQ	2.29 ( $\sigma$ :0.04)	1.74 ( $\sigma$ :0.03)

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