1998A&A...333...48P


C.D.S. - SIMBAD4 rel 1.7 - 2021.04.15CEST14:31:45

1998A&A...333...48P - Astronomy and Astrophysics, volume 333, 48-62 (1998/5-1)

New active galactic nuclei detected in ROSAT All Sky Survey galaxies. I. Verification of selection strategy.

PIETSCH W., BISCHOFF K., BOLLER T., DOEBEREINER S., KOLLATSCHNY W. and ZIMMERMANN H.-U.

Abstract (from CDS):

We present the first results of a program to identify so far unknown active nuclei (AGN) in galaxies. Candidate galactic nuclei have been selected for optical spectroscopy from a cross-correlation of the ROSAT All Sky Survey (RASS) bright source catalog with optical galaxy catalogs. A high X-ray flux has been used as pointer to galaxies with a high probability to contain active nuclei. Only galaxies have been accepted for the program for which no activity was noted in NED. For many of the galaxies no radial velocity was reported before. The optical spectra demonstrate that the galaxies cover a redshift range of 0.014 to 0.13 and that most of them host active nuclei. For 75% of the 33 candidates the X-ray emission is caused by the AGN. In addition several of the remaining candidates host Seyfert 2/LINER nuclei that, however, most certainly cannot explain the X-ray emission alone. Three BL Lac objects have been detected serendipitously in galaxy fields that have been followed up by short ROSAT HRI observations to confirm the X-ray galaxy identification with improved position accuracy and point response function. The sources show X-ray to radio flux ratios typical for X-ray selected BL Lac objects. The results presented in the paper prove the selection strategy as very successful to detect previously unknown AGN of all Seyfert 1 types in nearby galaxies encouraging the extension of this program. The detection of new nearby AGN will be used to initiate a detailed investigation of their multi-wavelength properties and a comparison with the more distant AGN population.

Abstract Copyright:

Journal keyword(s): X-rays: galaxies - galaxies: active - BL Lacertae objects - surveys

Simbad objects: 41

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Number of rows : 41

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 2MASX J00080560+1450227 Sy1 00 08 05.6217705990 +14 50 23.367881952   17.94 17.33     ~ 37 0
2 ESO 540-1 Sy1 00 34 13.637 -21 26 19.04   13.66   12.36 13.5 ~ 96 0
3 2MASX J00423686-1049222 Sy1 00 42 36.8636488632 -10 49 22.096052937   17.03 16.58 13.7   ~ 35 0
4 ESO 113-10 Sy1 01 05 16.8725940848 -58 26 15.265543353   14.63 14.6 13.35   ~ 52 0
5 UGC 716 BiC 01 09 18.448 +13 10 09.02   15.7       ~ 23 0
6 NGC 427 Sy1 01 12 19.2613820194 -32 03 40.132833003   15.06   13.69   ~ 23 0
7 2QZ J011232.7-320142 BLL 01 12 32.7717117277 -32 01 41.813565848     21.10 19.8   ~ 14 0
8 ESO 244-17 Sy1 01 20 19.6843781341 -44 07 42.880335191   14.59 14.75 13.07   ~ 41 0
9 MCG-01-05-031 Sy2 01 45 25.4697307890 -03 49 37.692407895   14 14 12.91   ~ 44 0
10 ESO 80-5 Sy1 01 47 39.2861593794 -66 09 47.465709054   16.05 16.0 14.57   ~ 14 0
11 [VV98] J023454.5-293428 QSO 02 34 54.6041585722 -29 34 27.155936675     17.90     ~ 7 0
12 ESO 416-2 Sy1 02 35 13.4533443933 -29 36 17.246275518   14.92   13.53   ~ 49 0
13 4FGL J0235.6-2939 BLL 02 35 36.7066736756 -29 38 43.044497655       19   ~ 22 0
14 RXC J0255.8+0918 ClG 02 55 51.3 +09 18 48           ~ 21 0
15 IC 1867 Sy2 02 55 52.262 +09 18 42.35   15.0       ~ 26 0
16 NGC 1217 LIN 03 06 06.0419355247 -39 02 10.897090789   13.34   11.46   ~ 39 0
17 NGC 1218 Sy1 03 08 26.2238190 +04 06 39.300921   12.84       ~ 353 1
18 ESO 548-81 Sy1 03 42 03.7180399342 -21 14 39.646540303   12.84 13.68 11.57   ~ 105 0
19 1RXS J042710.2-624712 Sy2 04 27 12.5 -62 47 09     13.0     ~ 5 0
20 ESO 15-11 Sy1 04 35 16.3435484874 -78 01 55.986426083   15.55   14.33   ~ 29 0
21 MCG-02-12-050 Sy2 04 38 14.1908638030 -10 47 45.045766528   10.8   13.81   ~ 50 0
22 UGC 3134 Sy2 04 41 48.2601695179 -01 18 06.775198477   13.7   13.3 13.5 ~ 37 0
23 MCG-01-13-025 Sy1 04 51 41.5187776183 -03 48 33.735505171   15.15 14.18 8.9   ~ 73 1
24 ESO 552-39 Sy1 04 58 40.3118133114 -21 59 30.935620217   16.31 16.3 15.10   ~ 12 0
25 MCG-02-14-009 Sy1 05 16 21.2188391365 -10 33 41.416346872   15.0   13.30   ~ 58 1
26 ESO 120-23 G 05 55 52.524 -61 24 12.64   15.33   14.03   ~ 11 0
27 ESO 254-17 BLL 06 06 35.7336483301 -47 29 54.789509588   14.63 14.6 12.76   ~ 33 0
28 [VV98] J062309.1-643624 BLL 06 23 07.6967637429 -64 36 20.719136879   17.06 14.80 13.59   ~ 73 0
29 2FGL J0630.9-2406 BLL 06 30 59.5216647351 -24 06 46.202439455 16.48 16.22 16.04 16   ~ 71 1
30 ESO 490-26 Sy1 06 40 11.6917875755 -25 53 43.063876738   14.08   12.60   ~ 65 0
31 HD 49798 HXB 06 48 04.7000758397 -44 18 58.432035331 6.758 8.017 8.287 8.391 8.543 sdO6 288 0
32 ESO 122-16 LIN 07 12 03.6726015533 -60 30 26.746962026   14.62   12.80   ~ 19 0
33 ESO 209-12 Sy1 08 01 57.9736077076 -49 46 42.394360438   15.31 15.3 13.78   ~ 66 0
34 NGC 3079 Sy2 10 01 57.80342 +55 40 47.2428 11.57 11.54 10.86     ~ 1284 3
35 M 106 Sy2 12 18 57.620 +47 18 13.39   9.14 8.41 8.11   ~ 2179 3
36 NGC 7158 Sy1 21 56 56.6156156507 -11 39 30.934012748   11.6   10.3   ~ 22 0
37 NGC 7293 PN 22 29 38.5453078023 -20 50 13.746093105 11.894 13.158 13.524 13.689 13.898 DAO.5 908 0
38 ESO 602-31 Sy1 22 36 55.9466233855 -22 13 15.037420126   14.33 13.90 13.41   ~ 36 0
39 IC 5287 Sy2 23 09 20.2681643853 +00 45 23.408925274   14.74 17.08     ~ 58 1
40 MCG-02-59-006 Sy1 23 13 57.1398946660 -11 30 18.727191617   12.8   14.73   ~ 12 0
41 UGC 12492 Sy2 23 18 53.8149360327 -01 03 36.968322094   14.53 14.6 13.30   ~ 29 0

    Equat.    Gal    SGal    Ecl

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2021.04.15-14:31:45

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