1999ApJS..121..473B

Query : 1999ApJS..121..473B

1999ApJS..121..473B - Astrophys. J., Suppl. Ser., 121, 473-482 (1999/April-0)

A three-dimensional diagnostic diagram for Seyfert 2 galaxies: probing X-ray absorption and Compton thickness.

BASSANI L., DADINA M., MAIOLINO R., SALVATI M., RISALITI G., DELLA CECA R., MATT G. and ZAMORANI G.

Abstract (from CDS):

We present and discuss a three-dimensional diagnostic diagram for Seyfert 2 galaxies obtained using X-ray and [O III] data on a large sample of objects (reported in the Appendix). The diagram shows the Kα iron line equivalent width as a function of both the column density derived from the photoelectric cutoff and the 2-10 keV flux normalized to the [O III] optical-line flux (the latter corrected for extinction and assumed to be a true indicator of the source intrinsic luminosity). We find that the hard X-ray properties of type 2 objects depend on a single parameter, the absorbing column density along the line of sight, in accordance with the unified model. The diagram can be used to identify Compton-thick sources and to isolate and study peculiar objects. From this analysis we have obtained a column density distribution of Seyfert 2 galaxies that is thought to be a good approximation of the real distribution. A large population of heavily absorbed objects is discovered, including many Compton-thick candidates. Our results indicate that the mean log NH.cm–2 in type 2 Seyfert galaxies is 23.5 and that as many as 23%-30% of sources have NH≥1024 cm–2.

Abstract Copyright: ∼

Journal keyword(s): Galaxies: Seyfert - X-Rays: Galaxies

VizieR on-line data: <Available at CDS (J/ApJS/121/473): table1.dat table2.dat ref.dat>

Simbad objects: 71

goto Full paper

goto View the references in ADS

Number of rows : 71
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 MCG-01-01-043 Sy1 00 10 09.9800222568 -04 42 37.925414892   14.5 13.8 14.6   ~ 63 0
2 NGC 262 Bla 00 48 47.14147900 +31 57 25.0845702 14.04 13.90 13.06 8.53   ~ 778 2
3 IC 1631 Sy2 01 08 44.8711696416 -46 28 33.245044536   14.22       ~ 32 0
4 NGC 526 Sy2 01 23 54.3772245792 -35 03 55.710850788   14.76 14.60 13.46   ~ 354 2
5 M 77 Sy2 02 42 40.7091669408 -00 00 47.859690204 9.70 9.61 8.87 10.1 9.9 ~ 4897 2
6 NGC 1275 Bla 03 19 48.1599902040 +41 30 42.108850836   13.10 12.48 11.09   ~ 4243 3
7 NGC 1365 Sy1 03 33 36.458 -36 08 26.37 10.48 10.08 9.63 8.79 9.7 ~ 1987 2
8 NGC 1386 Sy1 03 36 46.238 -35 59 57.39 12.42 12.16 11.23 10.76   ~ 553 1
9 MCG-01-12-006 G 04 25 55.5454098216 -08 34 07.958576820   15.5       ~ 19 1
10 NGC 1672 SyG 04 45 42.552 -59 14 50.68 10.29 10.53 9.68 9.53 10.2 ~ 461 2
11 NGC 1667 Sy2 04 48 37.1804579280 -06 19 11.824427712   13.66 12.86 11.72   ~ 384 2
12 2E 1166 Sy1 04 51 37.3606577928 -18 18 44.828437104   19.0 18.5     ~ 41 0
13 ESO 33-2 Sy2 04 55 58.93368 -75 32 28.2336   14.61 14.60 13.39   ~ 177 1
14 NGC 1808 Sy2 05 07 42.343 -37 30 46.98 11.05 10.80 9.94 9.36 10.2 ~ 756 3
15 IRAS 05189-2524 Sy2 05 21 01.3994605776 -25 21 45.321827832   15.47 14.75     ~ 545 0
16 NGC 2110 Sy2 05 52 11.3768668776 -07 27 22.507465392   14.77 13.51 11.86   ~ 712 1
17 Z 329-24 Sy2 06 15 36.2812259376 +71 02 14.837219808 14.21 14.03 12.97     ~ 960 2
18 NGC 2273 Sy1 06 50 08.6691789600 +60 50 44.864645136   14.50 13.54     ~ 566 2
19 Z 31-36 Sy2 08 04 05.8608218112 +05 06 49.823376120   14.55 13.7     ~ 340 2
20 IRAS 09104+4109 Sy2 09 13 45.4951283928 +40 56 28.215343572   19.69 19.21     ~ 260 1
21 NGC 2992 Sy2 09 45 42.045 -14 19 34.90 13.54 13.14 12.18 12.6 12.2 ~ 951 3
22 MCG-05-23-016 Sy2 09 47 40.1332188528 -30 56 55.960779696   14.10 13.69 12.44   ~ 611 0
23 M 81 Sy2 09 55 33.1726556496 +69 03 55.062505368   7.89 6.94     ~ 4725 3
24 NGC 3081 Sy2 09 59 29.5437024336 -22 49 34.747341960   13.06 13.55 11.67 12.1 ~ 509 0
25 NGC 3079 Sy2 10 01 57.8789863992 +55 40 47.449758324 11.57 11.54 10.86     ~ 1476 3
26 NGC 3147 Sy2 10 16 53.6388580752 +73 24 02.641798224   11.43 10.61     ~ 533 2
27 NGC 3281 Sy2 10 31 52.086 -34 51 13.40   12.62 14.02 11.17   ~ 392 1
28 Z 333-49 Sy2 10 44 08.5546976016 +70 24 19.184554080   15.5       ~ 71 1
29 NGC 3393 Sy2 10 48 23.4653152920 -25 09 43.487648784   13.10 13.95 11.67 12.2 ~ 471 1
30 M 106 Sy2 12 18 57.620 +47 18 13.39   9.14 8.41 8.11   ~ 2512 4
31 NGC 4388 Sy2 12 25 46.820 +12 39 43.45 11.91 11.76 11.02     ~ 1433 2
32 NGC 4507 Sy2 12 35 36.6338976888 -39 54 33.710416272   12.95 13.54 11.70 12.4 ~ 532 1
33 M 58 Sy2 12 37 43.59747 +11 49 05.1240 10.80 10.48 9.66     ~ 1140 2
34 M 104 LIN 12 39 59.43185902 -11 37 22.9961800 9.51 9.55 8.00 8.05   ~ 1465 2
35 NGC 4941 Sy2 13 04 13.1036380320 -05 33 05.752803672   13.18 12.23 10.74   ~ 410 0
36 NGC 4939 Sy2 13 04 14.3280524928 -10 20 22.300454724   14.81 13.80 10.92   ~ 332 1
37 NGC 4945 Sy2 13 05 27.279 -49 28 04.44   9.31 14.40 7.55   ~ 1582 2
38 NGC 4968 Sy2 13 07 05.976 -23 40 37.34   13.78 14.79 12.46 12.78 ~ 198 2
39 NGC 5033 Sy2 13 13 27.535 +36 35 37.14   11.01 12.03 9.73   ~ 909 1
40 2MFGC 10568 Sy2 13 15 01.1718547416 +31 41 29.081482872   17.25   15.62   ~ 25 0
41 MCG-03-34-064 Sy2 13 22 24.4583154360 -16 43 42.481822404   14   13.16   ~ 345 2
42 NAME Centaurus A BLL 13 25 27.61521044 -43 01 08.8050291   8.18 6.84 6.66   ~ 4774 3
43 NGC 5135 Sy2 13 25 44.059 -29 50 01.24   12.58 13.35 11.53 12.2 ~ 500 1
44 NGC 5252 Sy2 13 38 15.8707724328 +04 32 33.521265600   15.21 14.21     ~ 514 1
45 Z 271-60 Sy2 13 44 42.1883001099 +55 53 13.596220922   15.68 14.91     ~ 958 3
46 Mrk 463E Sy1 13 56 02.88573 +18 22 18.8440   15.01 14.22     ~ 158 1
47 NAME Circinus Galaxy Sy2 14 13 09.906 -65 20 20.47   10.89 9.84 10.6 10.0 ~ 1331 1
48 NGC 5506 Bla 14 13 14.8761010056 -03 12 27.556909272   15.25 14.38     ~ 1173 1
49 NGC 5643 Sy2 14 32 40.778 -44 10 28.60   11.03 13.60 9.92 10.6 ~ 652 1
50 NGC 5674 Sy2 14 33 52.2788150880 +05 27 30.117378924   13.7 13.70     ~ 197 0
51 Z 273-23 Sy2 14 40 38.0960806920 +53 30 15.961505184   16.05 15.03     ~ 341 1
52 NGC 6251 Bla 16 32 31.96989253 +82 32 16.3999044 15.24 14.66 12.89 7.62   ~ 772 1
53 NGC 6240 Sy2 16 52 58.9 +02 24 03   14.31 13.37     ~ 1734 2
54 6C 170204+454510 Sy1 17 03 30.3824218008 +45 40 47.166180564   16.0       ~ 170 2
55 Mrk 507 Sy1 17 48 38.33640 +68 42 16.0560   16.33 15.45     ~ 157 1
56 LEDA 60982 Sy2 17 49 50.7150571536 +68 23 09.344524128   16 14.07 4.96   ~ 24 0
57 NGC 6552 Sy2 18 00 07.2518347776 +66 36 54.360343188   14.6 13.74     ~ 184 1
58 FRL 49 Sy2 18 36 58.2335883144 -59 24 08.282326320   11.1   14.19   ~ 270 1
59 ESO 103-35 Sy2 18 38 20.3204821536 -65 25 39.141804936   14.75 14.53 13.24   ~ 342 0
60 MCG+07-41-003 Bla 19 59 28.35656837 +40 44 02.0972325   16.22 15.10     ~ 2537 2
61 IRAS 20210+1121 Sy2 20 23 25.35647 +11 31 35.2200   15.83       ~ 56 1
62 IRAS 20460+1925 Sy1 20 48 17.2470227976 +19 36 55.956994560   13.93       ~ 76 0
63 IC 5063 Bla 20 52 02.15 -57 04 06.7   12.92 13.60 11.30   ~ 710 1
64 IC 1368 Sy2 21 14 12.5737106256 +02 10 40.891041444   14.3       ~ 65 2
65 NGC 7172 Sy2 22 02 01.897 -31 52 11.60   12.72 13.61 11.15 25.10 ~ 572 2
66 NGC 7314 Sy2 22 35 46.1985355872 -26 03 01.564993476   11.62 13.11 10.61 11.4 ~ 601 0
67 NGC 7319 Sy2 22 36 03.602 +33 58 33.18   14.57 13.53 12.65   ~ 325 0
68 IRAS 23060+0505 Sy1 23 08 33.9537309816 +05 21 29.751752412           ~ 160 0
69 NGC 7582 Sy2 23 18 23.60 -42 22 13.3 11.62 10.92 10.62     ~ 978 3
70 NGC 7590 Sy1 23 18 54.7949760192 -42 14 20.515300476   12.12 13.76 11.06 11.8 ~ 290 1
71 NGC 7674 Sy1 23 27 56.6973043968 +08 46 44.253707772 13.84 13.92 13.23 12.64   ~ 738 2

To bookmark this query, right click on this link: simbad:objects in 1999ApJS..121..473B and select 'bookmark this link' or equivalent in the popup menu