2000A&A...357...91F

Query : 2000A&A...357...91F

2000A&A...357...91F - Astronomy and Astrophysics, volume 35791-100 (2000/5-1)

Optical imaging and spectroscopy of BL Lac objects.

FALOMO R. and ULRICH M.-H.

Abstract (from CDS):

We present optical images and spectroscopy for a dozen of BL Lac objects. Most of these objects were not previously studied and we give for the first time the properties of their host galaxies. The properties of the new host galaxies are generally consistent with those derived in previous optical studies. We found a case (1101-23) where the external isophotes of the galaxy are clearly boxy. In addition we gathered spectroscopy for several BL Lac objects with unknown redshift and for companion galaxies. This allowed us to derive a tentative redshift for two new BL Lacs and to investigate the environment around PKS 0829+04. These data complement existing data available in the literature on host galaxies of BL Lacs and their (close) environments.

Abstract Copyright: ∼

Journal keyword(s): galaxies: active - galaxies: BL Lacertae objects: general - galaxies: interactions - galaxies: nuclei - galaxies: photometry - galaxies: structure

Nomenclature: Fig.6: [PFT94] PKS 0829+046 GN (Nos G3-G4) added.

CDS comments: Galaxies are already known in figures and text: G1 and G2 in PKS 0301-243 = [PFT95] PKS 0301-243 G1 and G2, G in PKS 0735+178 = [SFK93] 0735+178 G1, G1 in PKS 0734+100 = [PFT95] PKS 0734+100 G1, G1 to G2 in PKS 0829+046 = [PFT94] PKS 0829+046 G1 to G2.

Simbad objects: 24

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Number of rows : 24
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 1RXS J014126.8-092857 BLL 01 41 25.83216015 -09 28 43.6742470   16.94 16.55 17.21   ~ 302 1
2 [PFT95] PKS 0301-243 G1 G 03 03 26.1 -24 07 15           ~ 2 0
3 PKS J0303-2407 BLL 03 03 26.5025589984 -24 07 11.426291220   16.55 16.18     ~ 249 1
4 USNO-A2.0 0600-01199510 G 03 03 27.7 -24 07 01           ~ 3 0
5 QSO B0338-214 BLL 03 40 35.60785848 -21 19 31.1721373   16.04 17.1 17.07   ~ 182 1
6 1WGA J0353.0-3623 BLL 03 53 05.0447374488 -36 23 08.409059556       18.2   ~ 36 0
7 PKS J0550-3216 BLL 05 50 40.5705144672 -32 16 16.484718648   16.07 15.5     ~ 424 1
8 [SFK93] 0735+178 G1 G 07 38 07.0 +17 42 25           ~ 3 0
9 QSO J0738+1742 BLL 07 38 07.39375312 +17 42 18.9981506   16.76 16.22 15.78   ~ 1045 1
10 QSO B0736+01 Bla 07 39 18.03389906 +01 37 04.6177501   16.90 16.47 16.19   ~ 738 1
11 QSO B0754+10 BLL 07 57 06.64295154 +09 56 34.8522544   15.43 15.00 15.99   ~ 461 1
12 [PFT95] PKS 0754+100 G1 G 07 57 07.31 +09 56 42.6           ~ 2 0
13 QSO B0818-128 BLL 08 20 57.44762374 -12 58 59.1692275   15.30 15.00 16.5   ~ 187 1
14 USNO-A2.0 0900-06019126 G 08 31 43.99 +04 30 06.3           ~ 1 0
15 USNO-A2.0 0900-06019627 G 08 31 47.16 +04 29 50.3           ~ 1 0
16 QSO B0829+047 BLL 08 31 48.8770033992 +04 29 39.086842884   17.10 16.4 14.55   ~ 511 2
17 [PFT94] PKS 0829+046 G1 G 08 31 49.17 +04 29 36.5           ~ 2 0
18 USNO-A2.0 0900-06020087 G 08 31 50.15 +04 29 57.8           ~ 2 0
19 PMN J1103-2329 BLL 11 03 37.6150845072 -23 29 31.203773520   17.00 16.55 16.61   ~ 405 1
20 RX J1315.0-4236 BLL 13 15 03.3912307368 -42 36 49.760844084   18.07   16.59   ~ 114 0
21 1ES 1322-29.7 BLL 13 25 32.8682333328 -30 01 43.506096996     20.00 18.4   ~ 9 0
22 1RXS J133530.6-295031 BLL 13 35 29.7518919576 -29 50 38.921848188   18.13   19.25   ~ 70 0
23 1RXS J174357.3+193505 BLL 17 43 57.8330083440 +19 35 09.018846384     16.80 12.7   ~ 190 1
24 NGC 6994 err 20 59.0 -12 38           ~ 32 0

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