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Table 2:

Results of spectral fitting in different redshift bins.

$z_{\rm median}$ 		E(K$\alpha $) Binwidth Total Spectral log $L_{\rm X}$(2-10 keV) $\Gamma$ Eqw $\chi^2$/d.o.f. $\chi^2$/d.o.f. F-prob
  (keV) (keV) sources counts erg s-1   (eV) wabs(pow+zgauss) wabs(pow)  
(1) (2) (3) (4) (5) (6) (7) (8) (9) (10) (11)
zbin: 0.0-0.2
0.02 6.26 0.21 20(8) 10 440 $41.58^{\rm +0.05}_{-0.11}$ $0.93^{\rm +0.08}_{-0.07}$ $398^{\rm +54}_{-53}$ 491.9/435 642.5/437 >99.999
0.03 6.22 0.28 20(9) 8421 $41.81^{\rm +0.04}_{-0.14}$ $1.04^{\rm +0.06}_{-0.05}$ $455^{\rm +65}_{-66}$ 420.8/351 544.9/353 >99.999
0.06 6.01 0.83 23(4) 9433 $42.43^{\rm +0.05}_{-0.12}$ $1.06^{\rm +0.09}_{-0.08}$ $163^{\rm +54}_{-52}$ 373.4/385 399.3/387 >99.999
0.09 5.89 0.81 21(6) 13 986 $42.83^{\rm +0.05}_{-0.10}$ $1.52^{\rm +0.10}_{-0.09}$ $105^{\rm +66}_{-31}$ 508.9/518 527.7/520 99.991
0.12 5.71 0.75 22(3) 11 932 $43.28^{\rm +0.05}_{-0.09}$ $1.20^{\rm +0.08}_{-0.08}$ $105^{\rm +45}_{-46}$ 474.1/472 488.3/474 99.906
0.16 5.51 0.67 24(6) 24 645 $43.94^{\rm +0.03}_{-0.06}$ $1.37^{\rm +0.05}_{-0.04}$ $75^{\rm +30}_{-29}$ 712.9/737 729.3/739 99.976
zbin: 0.2-0.3
0.25 5.12 0.32 21(2) 6415 $43.14^{\rm +0.05}_{-0.31}$ $1.88^{\rm +0.12}_{-0.07}$ $201^{\rm +110}_{-109}$ 259.5/260 268.3/262 98.717
0.24 5.14 0.34 21(2) 27 481 $44.18^{\rm +0.03}_{-0.06}$ $1.72^{\rm +0.03}_{-0.02}$ $79^{\rm +31}_{-30}$ 728.8/708 746.2/710 99.976
zbin: 0.3-0.4
0.34 4.79 0.34 37(5) 15 594 $43.76^{\rm +0.03}_{-0.09}$ $1.82^{\rm +0.05}_{-0.03}$ $69^{\rm +49}_{-49}$ 439.6/477 444.8/479 94.026
zbin: 0.4-0.6
0.47 4.37 0.54 23(2) 7099 $43.59^{\rm +0.04}_{-0.17}$ $1.71^{\rm +0.08}_{-0.06}$ $144^{\rm +95}_{-93}$ 281.5/274 287.7/276 94.933
0.51 4.24 0.48 24 17 250 $44.41^{\rm +0.04}_{-0.06}$ $1.74^{\rm +0.04}_{-0.06}$ <98 475.3/485 479.4/487 87.255
zbin: 0.6-0.8
0.68 3.80 0.40 30(4) 9296 $43.88^{\rm +0.04}_{-0.13}$ $1.90^{\rm +0.07}_{-0.07}$ $163^{\rm +87}_{-96}$ 297.8/330 305.7/332 98.672
0.68 3.81 0.40 30(3) 26 254 $44.67^{\rm +0.02}_{-0.05}$ $1.83^{\rm +0.03}_{-0.03}$ $93^{\rm +39}_{-39}$ 602.3/561 616.9/563 99.881
zbin: 0.8-1.0
0.89 3.39 0.33 17 7142 $44.17^{\rm +0.03}_{-0.12}$ $1.90^{\rm +0.09}_{-0.07}$ <223 254.1/262 258.4/264 88.928
0.91 3.36 0.32 16 7360 $44.69^{\rm +0.03}_{-0.10}$ $1.88^{\rm +0.06}_{-0.06}$ <135 263.8/264 265.1/266 47.559
zbin: 1.0-1.3
1.16 2.97 0.38 30 12 833 $44.45^{\rm +0.02}_{-0.08}$ $2.06^{\rm +0.08}_{-0.05}$ <183 325.9/354 329.8/356 88.076
1.18 2.94 0.36 30 17 430 $45.02^{\rm +0.02}_{-0.05}$ $1.85^{\rm +0.05}_{-0.04}$ <51 423.0/417 423.0/418 5.595
zbin: 1.3-1.7
1.44 2.63 0.38 27 12 255 $44.51^{\rm +0.04}_{-0.07}$ $1.99^{\rm +0.13}_{-0.10}$ <174 358.9/352 361.5/354 71.753
1.46 2.60 0.38 25 23 180 $45.31^{\rm +0.02}_{-0.04}$ $1.89^{\rm +0.07}_{-0.04}$ <110 468.6/441 473.4/443 89.606
zbin: 1.7-2.1
1.89 2.22 0.23 12 5401 $45.03^{\rm +0.04}_{-0.10}$ $1.69^{\rm +0.17}_{-0.08}$ <193 199.1/200 201.9/201 90.608
zbin: 2.1-2.5
2.22 1.99 0.18 15 9352 $45.38^{\rm +0.04}_{-0.05}$ $1.92^{\rm +0.14}_{-0.12}$ <48 291.2/279 291.2/280 0.000
zbin: 2.5-3.0
2.88 1.65 0.16 6 5098 $45.56^{\rm +0.04}_{-0.06}$ $2.00^{\rm +0.20}_{-0.13}$ <115 177.5/190 178.0/191 50.559
zbin: 3.0-4.0
3.31 1.49 0.25 4 6717 $46.18^{\rm +0.04}_{-0.05}$ $1.66^{\rm +0.16}_{-0.14}$ <106 224.9/222 225.6/223 59.089
zbin: 4.0-5.0
4.31 1.21 0.14 9 12 611 $46.32^{\rm +0.03}_{-0.03}$ $1.76^{\rm +0.13}_{-0.11}$ <83 275.2/284 276.5/285 74.598

Notes. Column (1): median redshift of the bin; Col. (2): expected energy of the neutral Fe K$\alpha $ line; Col. (3): observed frame bin width at the 6.4 keV position, defined as $\triangle E= 6.4/1+z_{\min}{-}6.4/1+z_{\max}$. Comparatively large bin widths in the redshift bin 0.0-0.2 are due to the variation in $z_{\min}$ and $z_{\max}$introduced by splitting the sources in different luminosity bins; Col. (4): total number of stacked sources in different luminosity bins in each redshift bin (in parenthesis number of sources with significant Fe K$\alpha $ line); Col. (5): total net counts in the rest frame 2-10 keV band; Col. (6): rest frame X-ray luminosity measured in the 2-10 keV band; Col. (7): power law photon index quoted over the 2-10 keV band; errors are reported at the 90% confidence level for one interesting parameter; Col. (8): rest frame equivalent width of the Fe K$\alpha $ line; Col. (9): $\chi^2$ and degrees of freedom using a single absorbed powerlaw and a redshifted narrow Gaussian line; Col. (10): $\chi^2$ and degrees of freedom using a single absorbed powerlaw; Col. (11): the F-test probability of the line detection, for F-prob $\leq$ 90% the upper limits on the EW are quoted at the 90% confidence level.


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