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Table 1

Sample and results.

Object Class Thickness log (LX) log (νLν(12 μm)) log (νLν(20 μm) /νLν(30 μm)) τ9.7 EW (PAH 6.2 μm) EW (PAH 11.3 μm) PAH-vs-τ9.7 Steepness
NGC 315 LINER1 NCT 41.8 42.5 −0.070 0.070 ± 0.011 0.026 ± 0.010 0.073 ± 0.004 Weak –
IIIZw035 LINER2 CTc 40.0 43.1 (43.3) -0.803 1.046 ± 0.061 0.339 ± 0.077 0.496 ± 0.042 Strong Steep
NGC 1052 LINER1 NCT 41.2 42.3 (42.2) 0.074 0.179 ± 0.000 0.022 ± 0.003 0.022 ± 0.001 Weak –
NGC 1097 LINER1 NCT 40.8 43.4 (41.3) −0.235 −0.158 ± 0.000 0.405 ± 0.001 0.624 ± 0.001 Strong –
NGC 1291 LINER2 NCT 39.0 41.6 0.007 −0.002 ± 0.000 0.033 ± 0.003 0.226 ± 0.005 Weak –
NGC 2639 LINER1 CTc 40.3 41.9 −0.220 0.628 ± 0.000 0.057 ± 0.018 0.303 ± 0.011 Weak –
NGC 2655 LINER2 NCT 41.2 42.0 (41.8*) −0.128 0.192 ± 0.019 −0.011 ± 0.009 0.190 ± 0.005 Weak –
NGC 2685 LINER2 CTc 39.0 40.6 (39.9*) −0.009 0.017 ± 0.000 0.026 ± 0.014 0.078 ± 0.010 Weak –
UGC0 4881 LINER2 CTc −38.4 43.7 −0.442 0.594 ± 0.013 0.696 ± 0.013 0.793 ± 0.006 Strong Steep
3C218 LINER2 NCT 42.1 43.0 −0.211 1.064 ± 0.000 −0.038 ± 0.043 0.572 ± 0.057 Weak –
NGC 2841 LINER2 NCT 39.2 41.9 0.044 −0.154 ± 0.000 0.037 ± 0.007 0.248 ± 0.008 Weak –
NGC 3079 LINER2 CT 42.1 42.5 −0.609 1.400 ± 0.021 0.434 ± 0.013 0.781 ± 0.038 Deep Steep
NGC 3185 LINER2 CTc 39.4 41.9 (< 41.7) −0.237 0.198 ± 0.026 0.525 ± 0.049 0.563 ± 0.011 Strong –
NGC 3190 LINER2 NCT 39.5 42.3 −0.064 0.107 ± 0.016 0.105 ± 0.007 0.708 ± 0.008 Weak –
NGC 3628 LINER2 NCT 39.9 41.9 (< 40.6) −0.616 2.110 ± 0.000 0.428 ± 0.004 0.783 ± 0.007 Deep Steep
NGC 4125 LINER2 CTc 38.7 42.1 0.119 −0.213 ± 0.000 −0.011 ± 0.008 0.093 ± 0.011 Weak –
NGC 4261 LINER2 NCT 41.1 41.8 (41.6) 0.030 0.081 ± 0.013 −0.069 ± 0.004 0.062 ± 0.002 Weak –
NGC 4321 LINER2 NCT 40.5 41.1 0.019 0.115 ± 0.016 0.042 ± 0.003 0.262 ± 0.004 Weak –
NGC 4374 LINER2 CTc 39.5 41.4 (< 40.8) −0.004 −0.100 ± 0.000 0.024 ± 0.006 0.154 ± 0.008 Weak –
NGC 4438 LINER1 CTc <39.0 41.6 (40.8) −0.304 0.123 ± 0.008 0.206 ± 0.008 0.493 ± 0.004 Weak Steep
NGC 4450 LINER1 NCT 40.3 41.6 0.142 −0.670 ± 0.000 0.119 ± 0.016 0.453 ± 0.012 Weak –
NGC4486 LINER2 NCT 40.8 41.7 (41.1) 0.075 −0.141 ± 0.000 0.028 ± 0.025 −0.010 ± 0.022 Weak –
NGC 4552 LINER2 NCT 39.2 41.7 0.196 −0.264 ± 0.000 0.051 ± 0.006 0.014 ± 0.008 Weak –
NGC 4579 LINER1 NCT 41.1 42.5 (41.9) 0.002 −136.483 ± 0.000 0.130 ± 0.008 0.259 ± 0.004 Weak –
NGC 4589 LINER2 CTc 38.9 41.2 0.256 0.221 ± 0.000 0.156 ± 0.009 0.197 ± 0.009 Weak –
NGC 4594 LINER2 NCT 40.0 41.8 (40.1) 0.046 0.200 ± 0.000 0.030 ± 0.002 0.132 ± 0.002 Weak –
NGC 4676A LINER2 NCT 39.9 43.6 −0.397 0.909 ± 0.012 0.334 ± 0.009 0.747 ± 0.004 Strong Steep
NGC 4698 LINER2 CTc 38.7 41.3 (< 40.9) −0.199 −0.222 ± 0.000 0.016 ± 0.016 0.028 ± 0.025 Weak –
NGC 4696 LINER2 NCT 40.0 41.5 0.224 −0.140 ± 0.000 0.010 ± 0.011 0.021 ± 0.014 Weak –
NGC 4736 LINER2 NCT 38.6 42.0 (40.0) −0.300 −0.359 ± 0.000 0.153 ± 0.001 0.680 ± 0.001 Weak Steep
NGC 5005 LINER1 CTc <39.9 42.4 (41.5) −0.437 0.368 ± 0.046 0.200 ± 0.009 0.702 ± 0.014 Weak Steep
MRK 266NE LINER2 CTc 41.7 43.3 (43.2*) −0.325 0.385 ± 0.066 0.405 ± 0.083 0.336 ± 0.022 Strong Steep
NGC 5866 LINER2 CTc 38.3 42.0 (<40.7) −0.144 0.189 ± 0.021 0.057 ± 0.005 0.518 ± 0.006 Weak –
NGC 6240 LINER2 CT 44.3 44.3 (43.5) −0.436 1.184 ± 0.039 0.331 ± 0.017 0.525 ± 0.017 Strong Steep
NGC 6251 LINER2 CTc 41.6 42.9 (42.6*) 0.124 −0.392 ± 0.000 −0.021 ± 0.003 0.025 ± 0.002 Weak –
NGC 7130 LINER2 CT 43.1 43.8 (43.2) −0.260 0.772 ± 0.000 0.240 ± 0.019 0.297 ± 0.020 Strong Steep
NGC 7331 LINER2 CTc 40.5 42.3 −0.143 0.007 ± 0.007 0.124 ± 0.005 0.483 ± 0.003 Weak –
IC 1459 LINER2 NCT 40.5 41.6 (< 41.6) −0.127 0.213 ± 0.000 0.055 ± 0.004 0.108 ± 0.003 Weak –
NPM1G-12.0625 LINER2 NCT <41.5 43.2 −0.243 1.051 ±−0.000 0.006 ± 0.094 0.009 ± 0.042 Weak Steep
NGC 7743 LINER2 CTc <39.5 41.5 (<41.1) −0.252 −0.442 ± 0.000 0.054 ± 0.021 0.463 ± 0.015 Weak Steep
Fairall9 S1 NCT 44.0 44.6 (44.5) 0.201 −0.162 ± 0.000 0.003 ± 0.005 0.013 ± 0.004 Weak –
NGC 526A S1 NCT 43.2 43.6 (43.7) 0.283 −0.096 ± 0.000 −0.008 ± 0.009 0.009 ± 0.007 Weak –
MRK 1066 S2 CT 42.9 43.5 −0.232 0.395 ± 0.033 0.256 ± 0.008 0.422 ± 0.009 Strong –
NGC 1386 S2 CT 41.6 42.4 (42.2) −0.138 0.622 ± 0.036 0.007 ± 0.006 0.057 ± 0.007 Weak –
NGC 2110 S2 NCT 42.4 43.1 (43.0) −0.010 −0.210 ± 0.000 0.015 ± 0.005 0.036 ± 0.006 Weak –
E005-G004 S2 CT 41.9 42.2 (41.6) −0.242 1.199 ± 0.031 0.104 ± 0.012 0.291 ± 0.010 Weak Steep
MRK3 S2 CT 44.4 44.0 (43.7) 0.103 0.547 ± 0.000 0.007 ± 0.006 0.009 ± 0.005 Weak –
NGC 2273 S2 CT 42.2 43.0 −0.133 0.235 ± 0.037 0.154 ± 0.008 0.271 ± 0.012 Weak –
IRAS07145-2914 S2 CT 42.5 42.8 −0.028 0.120 ± 0.029 0.075 ± 0.009 0.201 ± 0.019 Weak –
MCG-5-23-16 S2 NCT 43.0 43.4 (43.4) 0.088 0.084 ± 0.026 0.005 ± 0.012 0.008 ± 0.011 Weak –
NGC 3081 S2 NCT 42.5 43.0 (42.8) 0.019 0.052 ± 0.034 0.009 ± 0.010 0.041 ± 0.005 Weak –
NGC 3281 S2 CT 43.2 43.5 (43.5) −0.128 1.094 ± 0.033 0.020 ± 0.013 0.015 ± 0.020 Weak –
NGC 3393 S2 CT 42.9 42.9 (42.8) −0.100 0.617 ± 0.000 0.027 ± 0.016 0.084 ± 0.008 Weak –
NGC 3621 S2 NCT 39.3 41.6 −0.039 0.004 ± 0.011 0.434 ± 0.010 0.793 ± 0.005 Strong –
NGC 3783 S1 NCT 42.8 43.5 0.065 0.175 ± 0.000 0.000 ± 0.014 0.006 ± 0.005 Weak –
NGC 4388 S2 NCT 41.7 43.2 (42.8) −0.125 0.660 ± 0.028 0.051 ± 0.005 0.116 ± 0.007 Weak –
NGC 4507 S2 NCT 43.1 43.7 (43.7) 0.017 0.148 ± 0.000 0.008 ± 0.006 0.036 ± 0.004 Weak –
NGC 4725 S2 NCT 38.9 41.6 0.277 −3.452 ± 0.000 −0.006 ± 0.008 0.520 ± 0.014 Weak –
NGC 4939 S2 CT 42.6 42.5 0.019 0.235 ± 0.000 0.048 ± 0.025 0.066 ± 0.015 Weak –
NGC 4941 S2 NCT 40.5 41.6 (41.6) −0.048 0.021 ± 0.048 0.028 ± 0.018 0.043 ± 0.014 Weak –
NGC 4945 S2 CT 42.3 42.1 (40.0) −1.018 2.958 ± 0.025 0.406 ± 0.009 0.599 ± 0.021 Deep Steep
NGC 5033 S1 NCT 41.1 42.9 (41.3) −0.118 0.172 ± 0.006 0.313 ± 0.004 0.618 ± 0.002 Strong –
NGC 5135 S2 CT 43.1 43.7 (43.2) −0.281 0.513 ± 0.023 0.292 ± 0.009 0.454 ± 0.008 Strong Steep
NGC 5194 S2 CTc 40.9 42.3 −0.188 0.196 ± 0.003 0.318 ± 0.003 0.658 ± 0.001 Strong –
MCG-6-30-15 S1 NCT 42.8 42.7 (42.8) 0.115 0.147 ± 0.000 0.006 ± 0.008 0.030 ± 0.009 Weak –
IC 4329A S1 NCT 42.4 44.2 (44.2) 0.182 −0.033 ± 0.000 0.006 ± 0.004 0.013 ± 0.009 Weak –
NGC 5347 S2 CT 42.4 43.0 (43.0) 0.054 0.113 ± 0.019 0.037 ± 0.010 0.043 ± 0.006 Weak –
Circinus S2 CT 41.9 42.8 (42.6) −0.373 0.997 ± 0.012 0.051 ± 0.003 0.044 ± 0.003 Weak Steep
NGC 5506 S2 NCT 43.0 43.4 (43.2) −0.038 0.603 ± 0.025 0.012 ± 0.006 0.045 ± 0.004 Weak –
NGC 5548 S1 NCT 42.8 43.6 (43.3) 0.097 −0.064 ± 0.000 0.014 ± 0.008 0.046 ± 0.005 Weak –
NGC 5643 S2 CT 42.6 42.3 (42.3) −0.183 0.100 ± 0.028 0.185 ± 0.011 0.243 ± 0.007 Weak –
NGC 5728 S2 CT 43.0 42.7 (42.1) −0.393 0.784 ± 0.051 0.228 ± 0.017 0.595 ± 0.013 Weak Steep
ESO103-G035 S2 NCT 43.4 43.8 (43.7) 0.032 0.590 ± 0.029 0.005 ± 0.006 0.003 ± 0.006 Weak –
E138-G001 S2 CT 42.5 43.6 (41.6) 0.133 0.118 ± 0.000 0.012 ± 0.005 0.038 ± 0.021 Weak –
H1846-786 S1 NCT 44.6 44.2 −0.035 0.029 ± 0.060 0.048 ± 0.023 0.039 ± 0.012 Weak –
IRAS19254-7245 S2 CT 44.5 44.8 −0.236 0.649 ± 0.023 0.074 ± 0.009 0.131 ± 0.012 Weak –
MRK 509 S1 NCT 42.9 44.3 (44.2) 0.108 −0.029 ± 0.000 0.019 ± 0.006 0.057 ± 0.005 Weak –
NGC 7172 S2 CT 42.7 43.0 (42.9) −0.213 2.069 ± 0.035 0.039 ± 0.006 0.174 ± 0.013 Deep –
NGC 7213 S1 NCT 42.2 42.8 (42.6) 0.205 −0.433 ± 0.000 0.007 ± 0.007 0.043 ± 0.005 Weak –
NGC 7314 S2 NCT 42.3 42.1 (41.9) −0.122 0.546 ± 0.056 0.019 ± 0.015 0.067 ± 0.019 Weak –
MCG-2-58-22 S1 NCT 44.3 44.1 0.093 −0.024 ± 0.000 0.000 ± 0.011 0.019 ± 0.009 Weak –
NGC 7582 S2 CT 42.6 42.6 (42.8) −0.301 0.296 ± 0.040 0.284 ± 0.037 0.315 ± 0.013 Strong Steep
PG0026+129 PG QSO NCT 44.5 44.5 (44.6) 0.322 −0.151 ± 0.000 −0.014 ± 0.012 0.008 ± 0.015 Weak –
PG0050+124 PG QSO NCT 43.9 45.0 0.020 −0.224 ± 0.000 0.006 ± 0.005 0.013 ± 0.004 Weak –
PG0052+251 PG QSO NCT 44.6 44.9 (44.7) 0.328 −0.233 ± 0.000 −0.000 ± 0.025 0.022 ± 0.016 Weak –
PG0804+761 PG QSO NCT 44.5 45.0 0.212 −0.359 ± 0.000 −0.005 ± 0.006 −0.000 ± 0.005 Weak –
PG0838+770 PG QSO NCT 43.5 44.6 −0.002 −0.098 ± 0.000 0.007 ± 0.007 0.020 ± 0.012 Weak –
PG0844+349 PG QSO NCT 43.7 44.2 (44.0) 0.237 −0.333 ± 0.000 0.004 ± 0.008 0.014 ± 0.011 Weak –
PG1001+054 PG QSO NCT 43.0 44.7 0.131 −0.126 ± 0.000 0.032 ± 0.013 0.039 ± 0.022 Weak –
PG1116+215 PG QSO NCT 44.5 45.2 0.201 −0.174 ± 0.000 −0.015 ± 0.028 0.019 ± 0.021 Weak –
PG1126-041 PG QSO NCT 43.1 44.3 0.055 0.174 ± 0.000 −0.007 ± 0.008 0.038 ± 0.052 Weak –
PG1211+143 PG QSO NCT 43.7 44.8 0.224 −0.216 ± 0.000 −0.000 ± 0.008 0.002 ± 0.006 Weak –
PG1229+204 PG QSO NCT 43.5 44.2 0.158 −0.055 ± 0.000 −0.012 ± 0.008 0.004 ± 0.014 Weak –
PG1244+026 PG QSO NCT 43.2 43.8 0.022 −0.026 ± 0.000 0.029 ± 0.011 0.027 ± 0.009 Weak –
PG1307+085 PG QSO NCT 44.1 44.9 0.268 −0.003 ± 0.000 −0.052 ± 0.056 0.012 ± 0.037 Weak –
PG1309+355 PG QSO NCT 43.8 45.3 0.235 −0.295 ± 0.000 0.042 ± 0.061 0.018 ± 0.025 Weak –
PG1351+640 PG QSO NCT 43.1 45.0 0.063 −0.493 ± 0.000 0.026 ± 0.010 0.030 ± 0.006 Weak –
PG1402+261 PG QSO NCT 44.1 45.1 0.002 −0.172 ± 0.000 0.009 ± 0.013 0.017 ± 0.014 Weak –
PG1411+442 PG QSO NCT 43.4 44.7 0.197 −0.125 ± 0.000 0.007 ± 0.007 0.012 ± 0.008 Weak –
PG1426+015 PG QSO NCT 44.1 44.7 0.132 −0.180 ± 0.000 0.004 ± 0.007 0.024 ± 0.009 Weak –
PG1435-067 PG QSO NCT 44.0 44.5 0.223 −0.106 ± 0.000 0.012 ± 0.017 0.006 ± 0.014 Weak –
PG1440+356 PG QSO NCT 43.8 44.6 −0.027 −0.076 ± 0.000 0.034 ± 0.006 0.099 ± 0.013 Weak –
PG1448+273 PG QSO NCT 43.3 44.2 0.177 −0.102 ± 0.000 0.019 ± 0.010 0.046 ± 0.006 Weak –
PG1501+106 PG QSO NCT 43.7 44.2 0.142 −0.060 ± 0.000 −0.001 ± 0.008 0.005 ± 0.008 Weak –
PG1613+658 PG QSO NCT 44.2 45.1 0.007 -0.114 ± 0.000 0.020 ± 0.008 0.044 ± 0.009 Weak –
PG1626+554 PG QSO NCT 44.2 44.3 0.411 -0.426 ± 0.000 −0.009 ± 0.008 0.010 ± 0.016 Weak –
PG2130+099 PG QSO NCT 43.5 44.7 (44.6) 0.107 0.059 ± 0.000 0.007 ± 0.007 0.009 ± 0.007 Weak –
PG2214+139 PG QSO NCT 43.7 44.3 0.247 −0.260 ± 0.000 0.003 ± 0.004 0.009 ± 0.008 Weak –
NGC 520 SB NCT 40.0 42.7 −0.592 1.379 ± 0.030 0.371 ± 0.017 0.776 ± 0.014 Deep Steep
NGC 0855 SB NCT 37.9 40.5 −0.366 0.369 ± 0.053 0.475 ± 0.101 0.549 ± 0.020 Strong Steep
NGC 0925 SB NCT 38.3 41.0 −0.159 0.757 ± 0.000 0.454 ± 0.040 0.616 ± 0.015 Strong –
IC342 SB NCT 39.0 41.4 −0.237 0.890 ± 0.000 0.414 ± 0.009 0.478 ± 0.005 Strong –
NGC 1482 SB NCT 39.4 43.2 −0.329 0.432 ± 0.003 0.468 ± 0.002 0.764 ± 0.001 Strong Steep
NGC 1614 SB NCT 41.3 44.1 (< 43.7) −0.181 0.325 ± 0.051 0.445 ± 0.018 0.374 ± 0.023 Strong –
NGC 1808 SB NCT 39.7 42.6 (42.1) −0.295 0.132 ± 0.037 0.497 ± 0.009 0.677 ± 0.008 Strong Steep
NGC 2146 SB NCT 39.0 42.6 −0.414 0.762 ± 0.038 0.544 ± 0.014 0.758 ± 0.008 Strong Steep
NGC 2798 SB NCT 39.6 43.2 −0.297 0.008 ± 0.003 0.469 ± 0.005 0.599 ± 0.002 Strong Steep
NGC 2903 SB NCT 39.9 42.4 −0.300 0.016 ± 0.000 0.495 ± 0.018 0.663 ± 0.007 Strong Steep
NGC 2976 SB NCT 36.6 40.3 −0.075 0.885 ± 0.000 0.548 ± 0.036 0.612 ± 0.008 Strong –
NGC 3184 SB NCT 38.0 40.2 −0.138 1.220 ± 0.000 −0.151 ± 0.017 0.688 ± 0.015 Weak –
NGC 3198 SB NCT 38.2 41.9 −0.329 1.623 ± 0.008 0.255 ± 0.017 0.654 ± 0.009 Deep Steep
NGC 3256 SB NCT 40.8 43.7 (43.6) −0.321 0.233 ± 0.035 0.473 ± 0.008 0.479 ± 0.014 Strong Steep
NGC 3310 SB NCT 40.0 42.5 −0.359 0.029 ± 0.032 0.470 ± 0.017 0.614 ± 0.007 Strong Steep
NGC 3367 SB NCT 40.9 42.9 −0.009 0.226 ± 0.000 0.251 ± 0.039 0.138 ± 0.011 Strong –
M108 SB NCT 39.3 42.0 −0.489 0.272 ± 0.059 0.404 ± 0.028 0.618 ± 0.015 Strong Steep
MRK52 SB NCT 38.0 42.6 −0.074 0.633 ± 0.000 0.460 ± 0.033 0.259 ± 0.009 Strong –
NGC 7252 SB NCT 40.6 43.2 −0.318 0.274 ± 0.037 0.496 ± 0.019 0.830 ± 0.012 Strong Steep

Notes. We divided the sample according to their optical classifications by horizontal lines. Columns: (1) target name; (2) object type; (3) Compton-thickness. CT: Compton-thick; NCT: No Compton-thick (i.e. Compton-thin); CTc: Compton-thick candidate using indirect arguments (see text); (4) Logarithm of the intrinsic X-ray luminosity in the 2−10 keV band; (5) logarithmic of the mid-IR luminosity obtained with Spitzer at 12 μm. In parenthesis, the mid-IR luminosity obtained with ground-based observations is shown, when available. Those mid-IR luminosities with asterisks are presented here for the first time, using proprietary CanariCam/GTC observations; (6) mid-IR steepness expressed as the ratio between the mid-IR luminosity at 20 and 30 μm, log (νLν(20 μm) /νLν(30 μm)); (7) silicate attenuation strength at 9.7 μm; (8 and 9) equivalent width of the PAH features at 6.2 and 11.3 μm; (10) classification according to the EW(PAH 6.2 μm) and the τ9.7. Weak: EW(PAH 6.2 μm) < 0.233 μm. Strong: EW(PAH 6.2 μm) > 0.233 μm. Deep: τ9.7 μm> 1.25. (11) classification according to the steepness of the mid-IR spectrum (i.e. log (νLν(20 μm) /νLν(30 μm))). Steep: log (νLν(20 μm) /νLν(30 μm)) > −0.24.

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