2008A&A...477..473T

Query : 2008A&A...477..473T

2008A&A...477..473T - Astronomy and Astrophysics, volume 477473-479 (2008/1-2)

Optical spectroscopy of active galactic nuclei in SA57.

TREVESE D., ZITELLI V., VAGNETTI F., BOUTSIA K. and STIRPE G.M.

Abstract (from CDS):

The cosmological evolution of X-ray-selected and optically selected active galactic nuclei (AGNs) show different behaviours interpreted in terms of two different populations. The difference is evident mainly for low luminosity AGNs (LLAGNs), many of which are lost by optical photometric surveys. We are conducting a spectroscopical study of a composite sample of AGN candidates selected in SA57 following different searching techniques, to identify low luminosity AGNs and break down the sample into different classes of objects. AGN candidates were obtained through optical variability and/or X-ray emission. Of special interest are the extended variable objects, which are expected to be galaxies hosting LLAGNs. Among the 26 classified objects a fair number (9) show typical AGN spectra. Ten objects show Narrow Emission Line Galaxy spectra, and in most of them (8/10) optical variability suggests the presence of LLAGNs.

Abstract Copyright: ∼

Journal keyword(s): galaxies: active - galaxies: nuclei - galaxies: Seyfert - X-rays: galaxies

Simbad objects: 27

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Number of rows : 27
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 LEDA 167011 Q? 13 07 13.8 +29 20 40           ~ 5 0
2 [K80] SA 57 12472 G 13 07 29.20 +29 26 25.4   22.58   20.93   ~ 2 0
3 [K80] SA 57 16338 Sy2 13 07 30.3 +29 32 22           ~ 3 0
4 T89 598 Sy1 13 07 53.1 +29 34 16           ~ 4 0
5 SDSS J130756.68+292738.1 QSO 13 07 56.689 +29 27 38.20   21.53 21.30     ~ 7 0
6 [K80] SA 57 14260 G 13 07 58.37 +29 29 08.2           ~ 1 0
7 NGC 11426 4 Sy1 13 08 03.3865633704 +29 29 08.850855408   20.39   18.78   ~ 15 0
8 LEDA 3084991 Sy1 13 08 05.8938103776 +29 06 53.430538248     20.37     ~ 17 1
9 SA57X 38 G 13 08 13.52 +29 18 12.5   20.83   19.01   ~ 2 0
10 [K80] SA 57 6825 G 13 08 22.19 +29 18 07.8   22.92   21.26   ~ 2 0
11 SA57X 115 Sy1 13 08 24.0 +29 28 19   22.76   22.64   ~ 3 0
12 [BTK98] 918 Q? 13 08 34.14 +29 19 26.2           ~ 2 0
13 SA 57- reg 13 08 38 +29 23.1           ~ 179 0
14 [K80] SA 57 10953 G 13 08 50.34 +29 24 15.0           ~ 1 0
15 NGC 10432 6 Sy1 13 08 53.6 +29 14 06     21.33     ~ 9 0
16 SA57X 61 G 13 08 55.51 +29 21 10.5   20.96   19.05   ~ 2 0
17 [K80] SA 57 9820 G 13 08 56.74 +29 22 29.0           ~ 1 0
18 [K80] SA 57 9342 Sy2 13 08 56.8 +29 21 50           ~ 2 0
19 SA57X 81 * 13 09 00.1924902240 +29 22 58.654005852   20.18   18.47   ~ 3 0
20 NGPFG 49151 Q? 13 09 03.78 +29 33 05.3           ~ 3 0
21 KKC 66 Sy1 13 09 17.1 +29 31 04   21.89   21.15   ~ 7 0
22 2MASS J13093458+2923282 Q? 13 09 34.59 +29 23 28.3           ~ 3 0
23 [K80] SA 57 3873 G 13 09 36.84 +29 13 23.9           ~ 1 0
24 [K80] SA 57 2688 G 13 09 42.82 +29 11 24.7           ~ 1 0
25 NGC 10533 4 Sy2 13 09 44.0 +29 15 47           ~ 7 0
26 [BTK98] 1714 Q? 13 09 49.26 +29 28 00.4           ~ 2 0
27 T89 414 Q? 13 09 51.57 +29 26 16.2           ~ 2 0

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