2003A&A...399...77D

Query : 2003A&A...399...77D

2003A&A...399...77D - Astronomy and Astrophysics, volume 399, 77-90 (2003/2-3)

The intrinsic emission of Seyfert galaxies observed with BeppoSAX/PDS. I. Comparison of the average spectra of the three classes of Seyfert galaxies.

DELUIT S. and COURVOISIER T.J.-L.

Abstract (from CDS):

We present a study of the hard X-ray spectrum (>15 keV) of different classes of Seyfert galaxies observed with BeppoSAX/PDS. Using hard X-ray data, we avoid absorption effects modifying the Seyfert emission and have direct access to the central engine of these sources. The aim of this study is first to characterize the general properties of the hard X-ray spectrum of Seyfert 1, 1.5 and 2 galaxies and secondly to compare their intrinsic emission to test unified models according to which all the classes have the same nucleus. We compute the average spectrum of 14 Sy 1, 9 Sy 1.5 and 22 Sy 2 galaxies observed by the PDS (15-136 keV). The average spectrum of Sy 1 differs from that of Sy 2, the first requiring the presence of a high energy cutoff which is absent in the second. We also show that the reflection component is possibly more important in the Sy 2 emission. The nature of Sy 1.5 galaxies is ambiguous as they have a negligible reflection component (like Sy 1) and do not require a cutoff (like Sy 2).

Abstract Copyright: ∼

Journal keyword(s): galaxies: active - galaxies: nuclei - galaxies: Seyfert - gamma rays: observations - methods: data analysis - methods: statistical

Simbad objects: 45

Full paper

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Number of rows : 45

N	Identifier	Otype	ICRS (J2000) RA	ICRS (J2000) DEC	Mag U	Mag B	Mag V	Mag R	Mag I	Sp type	#ref 1850 - 2023	#notes
1	Mrk 335	Sy1	00 06 19.5372339024	+20 12 10.617404076		14.19	13.85			~	1228	0
2	2MASX J00215355-7910077	Sy2	00 21 53.5554103848	-79 10 08.025602016		17.33	16.3	15.19		~	77	0
3	Mrk 1152	Sy1	01 13 50.0743327440	-14 50 44.359466892		15.80	15.00	9.9		~	111	0
4	ESO 113-45	Sy1	01 23 45.7631533440	-58 48 20.808928944		14.08	13.83	13.34		~	855	0
5	NGC 526	Sy1	01 23 54.3772245792	-35 03 55.710850788		14.76	14.60	13.46		~	320	1
6	NGC 985	Sy1	02 34 37.882	-08 47 17.02		14.64	14.28	12.9		~	399	0
7	NGC 1358	Sy2	03 33 39.6807616872	-05 05 22.213915692		14.10	13.05	11.76		~	196	1
8	LB 1727	Sy1	04 26 00.7188165240	-57 12 01.769902992	13.68	14.58	14.37	14.8		~	271	0
9	LEDA 17155	Sy2	05 21 01.3994605776	-25 21 45.321827832		15.47	14.75			~	486	0
10	NGC 2110	Sy2	05 52 11.3768668776	-07 27 22.507465392		14.77	13.51	11.86		~	649	1
11	UGC 3374	Sy1	05 54 53.6080860768	+46 26 21.624853488		15.37	14.62			~	515	2
12	IC 450	Sy1	06 52 12.3346265592	+74 25 37.121227716		15.16	14.19			~	555	1
13	Mrk 110	Sy1	09 25 12.8479065576	+52 17 10.386311208		16.82	16.41			~	589	0
14	MCG+05-23-016	LIN	09 34 06.3274325304	+27 20 59.506582524		16				~	67	0
15	NGC 2992	Sy2	09 45 42.045	-14 19 34.90	13.54	13.14	12.18	12.6	12.2	~	864	3
16	Z 212-25	Sy1	10 34 38.5982990352	+39 38 28.187042604		17.37	16.90			~	353	1
17	NGC 3516	Sy1	11 06 47.4632200800	+72 34 07.298374656		13.12	12.40			~	1522	0
18	NGC 3783	Sy1	11 39 01.7096819040	-37 44 19.009642992		12.46	13.43	11.33	12.1	~	1618	0
19	NGC 4051	Sy1	12 03 09.6101337312	+44 31 52.682601288		11.08	12.92	9.94		~	2142	1
20	LEDA 90164	Sy2	12 09 45.1187842872	-05 01 13.431047484		17.52	17.8	16.56		~	102	1
21	NGC 4253	Sy1	12 18 26.5163572920	+29 48 46.531535472		14.34	13.57			~	1023	1
22	NGC 4388	Sy2	12 25 46.820	+12 39 43.45	11.91	11.76	11.02			~	1309	2
23	NGC 4507	Sy2	12 35 36.6338976888	-39 54 33.710416272		12.95	13.54	11.70	12.4	~	480	0
24	NGC 4593	Sy1	12 39 39.4435107024	-05 20 39.034988448		13.95	13.15			~	1065	0
25	NGC 4939	Sy2	13 04 14.3280524928	-10 20 22.300454724		14.81	13.80	10.92		~	297	1
26	IC 4271	Sy2	13 29 21.4493074392	+37 24 50.460172056		15.6				~	125	1
27	NGC 5252	Sy2	13 38 15.8707724328	+04 32 33.521265600		15.21	14.21			~	468	0
28	ESO 445-50	Sy1	13 49 19.2601801224	-30 18 34.213815504		13.81	13.66	12.18	12.35	~	783	0
29	NGC 5506	AGN	14 13 14.8761010056	-03 12 27.556909272		15.25	14.38			~	1073	0
30	NGC 5548	Sy1	14 17 59.5400291832	+25 08 12.603122268		14.35	13.73			~	2649	0
31	NGC 5674	Sy1	14 33 52.2788150880	+05 27 30.117378924		13.7	13.70			~	174	0
32	Mrk 841	Sy1	15 04 01.1935384104	+10 26 15.780409692		14.50	14.27			~	635	0
33	NGC 6300	Sy2	17 16 59.5418094960	-62 49 13.946588832		10.88	13.08	9.44	10.2	~	418	0
34	FRL 49	Sy2	18 36 58.2335883144	-59 24 08.282326320		11.1		14.19		~	234	0
35	ESO 103-35	Sy2	18 38 20.3204821536	-65 25 39.141804936		14.75	14.53	13.24		~	305	0
36	ESO 141-55	Sy1	19 21 14.1473895816	-58 40 12.982437480		14.36	13.64	13.28		~	352	0
37	IRAS 20210+1121	Sy2	20 23 25.35647	+11 31 35.2200		15.83				~	51	0
38	Mrk 509	Sy1	20 44 09.7504483224	-10 43 24.727155528		13.35	13.12	10.7		~	1252	0
39	NGC 7172	Sy2	22 02 01.897	-31 52 11.60		12.72	13.61	11.15	25.10	~	516	1
40	NGC 7213	Sy1	22 09 16.2100443720	-47 10 00.115999716		10.97	12.08	10.50	10.6	~	643	0
41	NGC 7314	Sy1	22 35 46.1985355872	-26 03 01.564993476		11.62	13.11	10.61	11.4	~	553	0
42	NGC 7469	Sy1	23 03 15.6	+08 52 26	12.60	13.00	12.34			~	2064	3
43	LEDA 70560	Sy2	23 08 33.9537309816	+05 21 29.751752412						~	147	0
44	NGC 7582	GiP	23 18 23.6	-42 22 13	11.62	10.92	10.62			~	885	2
45	NGC 7679	Sy2	23 28 46.6613717400	+03 30 41.013578196		13.2				~	262	1

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