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Table 2

Summary of some observational parameters.

ID SDSS DR7 2XMMi Catalogue texp EPIC-pn Redshift NH,Gal LX Notes
SDSS... 2XMM... Obs ID ks Counts3  × 1020 cm-2  × 1042erg s-1
“Missing AGN” sample
26 J141519.49-003021.5 J141519.4-003021 0145480101 13 1781  ±  44 0.135 3.28 8.27 a
42 J010712.03+140844.9 J010712.0+140844 0305920101 16 4502  ±  69 0.077 3.41 2.81 b
53 J135724.52+652505.9 J135724.5+652506 0305920501 1.7 931  ±  31 0.106 1.38 6.85 b
63 J111031.61+022043.2 iJ111031.6+022043 0504101801 8 344  ±  19 0.080 3.73 2.30
65 J114008.71+030711.4 J114008.7+030710 0305920201 34 23 860  ±  156 0.081 1.93 3.91 b
71 J124635.24+022208.7 J124635.3+022209 0051760101 4 31 746  ±  179 0.048 1.85 12.51 c
100 J221918.53+120753.1 J221918.5+120753 0103861201 8 19 684  ±  141 0.081 5.03 10.03 d
104 J092247.02+512038.0 J092246.9+512037 0300910301 6.3 12 029  ±  111 0.160 1.32 18.90
111 J094240.92+480017.3 J094240.9+480017 0201470101 14 424  ±  24 0.197 1.20 5.87
125 J133141.03-015212.4 J133141.0-015212 0112240301 24 2548  ±  52 0.145 2.39 11.90
129 J081053.75+280610.9 J081053.8+280611 0152530101 16 986  ±  33 0.285 2.93 18.17
161 J123126.44+105111.3 J123126.4+105111 0145800101 7.7 269  ±  18 0.304 2.14 6.86
⋆163 J123748.49+092323.1 iJ123748.5+092323 0504100601 0.125 1.48
171 J093922.90+370943.9 J093922.9+370942 0411980301 4 2857  ±  54 0.186 1.22 27.89
191 J155909.62+350147.4 J155909.6+350147 0112600801 11 80 531  ±  285 0.031 2.11 8.22
195 J103438.59+393828.2 J103438.6+393828 0109070101 28 2 1857 ± 214 0.043 1.31 c, e
203 J124013.82+473354.7 J124013.8+473355 0148740501 5.7 804  ±  29 0.117 1.32 1.03
204 J124058.45+473302.0 J124058.3+473302 0148740501 5 192  ±  15 0.367 1.33 35.88
214 J112405.15+061248.8 J112405.1+061248 0103863201 5 786  ±  29 0.272 4.61 36.76
241 J075216.55+500251.3 J075216.4+500251 0151270201 7.7 620  ±  26 0.263 5.17 57.45
275 J145108.76+270926.9 J145108.7+270926 0152660101 18 91 984  ±  305 0.065 2.70 20.35 f
302 J102812.67+293222.8 J102812.6+293222 0301650401 8.4 76  ±  13 0.287 1.91 3.57
318 J122230.71+155547.9 J122230.7+155547 0106860201 8.6 238  ±  17 0.367 1.99 16.00
329 J140621.89+222346.5 J140621.8+222347 0051760201 3.1 1911  ±  44 0.098 2.05 3.24 c, g
⋆335 J014856.95+135451.8 J014856.9+135450 0094383401 0.220 4.90
338 J082912.67+500652.3 iJ082912.8+500652 0303550901 2.2 442  ±  22 0.043 4.07 2.51 b
355 J131718.58+324035.6 J131718.6+324036 0135940201 10 161  ±  13 0.061 1.17 2.27
357 J134235.66+261534.0 J134235.6+261534 0108460101 26 867  ±  30 0.064 1.03 2.59
Sub-sample of optically-classified SF galaxies
8 J140919.94+262220.1 J140920.0+262219 0092850501 35 163 ± 20 0.059 1.40 6.0
56 J095848.66+025243.2 J095848.6+025243 0203362101 54 259 ± 32 0.079 1.83 36.0
79 J093402.02+551427.8 J093401.9+551428 0112520101 27 2178 ± 56 0.002 2.46 0.2
154 J162636.40+350242.0 iJ162636.5+350242 0505011201 14 127 ± 12 0.034 1.44 4.2
164 J080629.80+241955.6 J080629.7+241956 0203280201 6 156 ± 21 0.042 3.80 45.0
233 J122254.57+154916.4 J122254.6+154916 0106860201 10 473 ± 32 0.005 2.01 0.8
246 J085735.33+274605.1 J085735.4+274607 0210280101 68 256 ± 18 0.007 2.51 0.2
251 J123520.04+393109.1 J123519.9+393110 0204400101 26 97 ± 8 0.021 1.31 0.5

Notes. Left to right: numeric identifier of the source, SDSS object name where the full name should be “SDSS ...”, 2MM object name where the full name should be “2XMM J...”, XMM-Newton’s observation number, XMM-Newton’s exposure time in units of ks, the total counts in the EPIC pn monitor, Galactic column density from Dickey & Lockman (1990) in units of 1020 cm-2, and the hard X-ray luminosity. The last column give references about its classification for some sources: (a) Foschini et al. (2004); (b) Dewangan et al. (2008); (c) Piconcelli et al. (2005); (d) Gallo et al. (2006); (e) Maitra & Miller (2010); (f) Grupe et al. (2010); (g) Crummy et al. (2006) (among others).

(*)

These sources could not be analysed owing to the unreliability quality of the data statistics (number of EPIC-pn counts less than 50).

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