2003A&A...407..503D

Query : 2003A&A...407..503D

2003A&A...407..503D - Astronomy and Astrophysics, volume 407, 503-513 (2003/8-4)

Chandra observations of the X-ray environment of BL Lacs.

DONATO D., GLIOZZI M., SAMBRUNA R.M. and PESCE J.E.

Abstract (from CDS):

We present Chandra observations of the X-ray environment of a sample of 6 BL Lacertae objects. The improved sensitivity of the ACIS experiment allows us to separate the core X-ray emission from the contribution of diffuse emission from the host galaxy/cluster scales. Within the short (2-6ks) ACIS exposures, we find evidence for diffuse X-ray emission in 3 sources (BL Lac, PKS 0548-322, and PKS 2005-489). The diffuse emission can be modeled with a King profile with β∼0.3-0.6, core radii rc∼15-28kpc, and 0.4-5keV luminosities in the range 1041-1042erg/s. In the remaining 3 sources, one (3C 371) has a radial profile entirely consistent with an unresolved source, while two (1ES 2344+514 and 1ES 2321+419) show evidence for weak diffuse emission on kpc scales. These results support current models for radio-loud AGN unifying BL Lacs and FRI radio galaxies through the orientation of their jets. In PKS 0548-322 and PKS 2005-489, we also find evidence for diffuse emission on cluster scales, although the spatial properties of this emission are not constrained. The temperature (kT∼3-5keV) and luminosity (L0.4–5keV∼1042erg/s) of the cluster gas are typical of normal clusters. Interestingly, these are the two brightest sources of the sample, suggesting a link between environment and nuclear activity.

Abstract Copyright: ∼

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

Nomenclature: Table 5: [DGS2003] PKS 0548-322 A (Nos A-G), [DGS2003] 3C 371 A (Nos A-G), [DGS2003] PKS 2005-489 A (Nos A-G), [DGS2003] BL Lac A (Nos A-L, J, K missing), [DGS2003] 1ES 2321+514 A (Nos A-M, J, K missing), [DGS2003] 1ES 2344+514 A (Nos A-G).

Simbad objects: 54

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Number of rows : 54
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2024 		#notes
1 [DGS2003] PKS 0548-322 E * 05 50 21.6680899200 -32 16 48.815078052   18.9       ~ 1 0
2 [DGS2003] PKS 0548-322 D * 05 50 27.207 -32 13 49.27   20.7       ~ 1 0
3 2MASXI J0550366-321733 G 05 50 31.5446442624 -32 17 38.857717752   20.1       ~ 2 0
4 2MASX J05503659-3217323 Sy1 05 50 36.6349433784 -32 17 33.169841916   17.3       ~ 7 0
5 QSO B0548-322 BLL 05 50 40.5705144672 -32 16 16.484718648   16.07 15.5     ~ 408 1
6 [DGS2003] PKS 0548-322 A * 05 50 52.2039130536 -32 10 52.762193400   16.8       ~ 1 0
7 2XMM J055113.3-322547 AG? 05 51 13.26 -32 25 47.5           ~ 2 0
8 TYC 7062-808-1 * 05 51 14.7041365968 -32 13 02.314500348   13.19 12.17     ~ 1 0
9 [DGS2003] 3C 371 G * 18 06 03.3815967816 +69 51 17.605518048   19.3       ~ 1 0
10 [DGS2003] 3C 371 D X 18 06 50.17 +69 46 13.8           ~ 1 0
11 3C 371 BLL 18 06 50.6802916920 +69 49 28.109609256   14.77 14.22 11.39   ~ 856 2
12 [DGS2003] 3C 371 F X 18 06 58.78 +69 43 59.0           ~ 1 0
13 [DGS2003] 3C 371 C X 18 07 04.30 +69 49 32.8           ~ 1 0
14 [DGS2003] 3C 371 B * 18 07 26.5925515248 +69 46 27.216910344   19.2       ~ 1 0
15 [DGS2003] 3C 371 E X 18 07 27.11 +69 45 32.1           ~ 1 0
16 [DGS2003] 3C 371 A X 18 07 37.87 +69 51 12.1           ~ 1 0
17 [DGS2003] PKS 2005-489 G X 20 08 30.15 -48 50 33.2           ~ 1 0
18 HD 190857 ** 20 09 07.1234200 -48 55 34.365651   10.746 10.172     F7/G0V 16 0
19 QSO B2005-489 BLL 20 09 25.3903899240 -48 49 53.725051056   15.75 12.81 11.41   ~ 576 2
20 [DGS2003] PKS 2005-489 F * 20 09 30.3075089520 -48 56 18.590992836   19.9       ~ 1 0
21 [DGS2003] PKS 2005-489 E * 20 09 36.4917651864 -48 42 02.379002688   19.4       ~ 1 0
22 [DGS2003] PKS 2005-489 A X 20 09 41.06 -48 47 22.9           ~ 1 0
23 [DGS2003] PKS 2005-489 D * 20 09 52.6029743712 -48 56 08.146661424   19.0       ~ 1 0
24 [DGS2003] BL Lac D X 22 02 14.64 +42 13 53.4           ~ 1 0
25 [DGS2003] BL Lac L X 22 02 18.88 +42 22 28.9           ~ 1 0
26 [DGS2003] BL Lac I X 22 02 30.81 +42 11 29.2           ~ 1 0
27 NAME BL Lac BLL 22 02 43.2913536816 +42 16 39.979416792   15.66 14.72     ~ 2258 1
28 [DGS2003] BL Lac C X 22 02 43.81 +42 13 45.3           ~ 1 0
29 2MASS J22025103+4213026 * 22 02 51.0547964424 +42 13 02.595792576   18.2       ~ 1 0
30 UCAC4 662-103512 * 22 02 53.6418350844 +42 17 48.178621509   14.258 13.279 13.018   ~ 1 0
31 2MASS J22025396+4211006 * 22 02 53.9648587440 +42 11 00.885386292   18.1       ~ 1 0
32 [DGS2003] BL Lac G X 22 03 03.50 +42 14 01.2           ~ 1 0
33 [DGS2003] BL Lac F * 22 03 09.8702242776 +42 13 37.069988880   15.0       ~ 1 0
34 [DGS2003] BL Lac E X 22 03 11.04 +42 14 36.9           ~ 1 0
35 [DGS2003] 1ES 2321+514 M X 23 23 11.51 +42 06 36.6           ~ 1 0
36 [DGS2003] 1ES 2321+514 L X 23 23 26.60 +42 05 53.7           ~ 1 0
37 [DGS2003] 1ES 2321+514 G X 23 23 27.33 +42 08 45.9           ~ 1 0
38 [DGS2003] 1ES 2321+514 D X 23 23 33.08 +42 07 42.1           ~ 1 0
39 [DGS2003] 1ES 2321+514 C X 23 23 35.36 +42 05 51.8           ~ 1 0
40 [DGS2003] 1ES 2321+514 B * 23 23 40.5712173624 +42 05 28.822355808   18.6       ~ 1 0
41 [DGS2003] 1ES 2321+514 I * 23 23 43.3738844952 +42 01 42.697522704   18.6       ~ 1 0
42 2E 4725 BLL 23 23 52.0756006920 +42 10 58.553658012     17.00 19.9   ~ 92 0
43 [DGS2003] 1ES 2321+514 H X 23 24 01.26 +42 00 46.5           ~ 1 0
44 [DGS2003] 1ES 2321+514 F * 23 24 02.1859828512 +42 05 22.473176316   17.1       ~ 1 0
45 [DGS2003] 1ES 2321+514 A X 23 24 06.48 +42 11 52.9           ~ 1 0
46 [DGS2003] 1ES 2321+514 E X 23 24 16.16 +42 14 28.7           ~ 1 0
47 [DGS2003] 1ES 2344+514 C X 23 46 36.64 +51 42 30.5           ~ 1 0
48 QSO B2344+514 BLL 23 47 04.8372110928 +51 42 17.877513168     15.50 10.7   ~ 461 0
49 [DGS2003] 1ES 2344+514 B * 23 47 10.3265442240 +51 40 32.121622920   17.9       ~ 1 0
50 [DGS2003] 1ES 2344+514 E X 23 47 23.94 +51 41 36.8           ~ 1 0
51 [DGS2003] 1ES 2344+514 A * 23 47 27.0760457688 +51 40 18.865496964   19.1       ~ 1 0
52 [DGS2003] 1ES 2344+514 G X 23 47 32.77 +51 34 42.0           ~ 1 0
53 TYC 3650-158-1 * 23 47 34.4979536208 +51 43 52.762717596   11.85 11.17     ~ 2 0
54 [DGS2003] 1ES 2344+514 F X 23 48 06.02 +51 40 16.9           ~ 1 0

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