2010ApJ...712...14M

Query : 2010ApJ...712...14M

2010ApJ...712...14M - Astrophys. J., 712, 14-25 (2010/March-3)

Imaging redshift estimates for BL Lacertae objects.

MEISNER A.M. and ROMANI R.W.

Abstract (from CDS):

We have obtained high dynamic range, good natural seeing i' images of BL Lacertae objects (BL Lacs) to search for the active galactic nucleus host and thus constrain the source redshift. These objects are drawn from a sample of bright flat-spectrum radio sources that are either known (via recent Fermi Large Area Telescope observations) gamma-ray emitters or similar sources that might be detected in continuing gamma-ray observations. All had spectroscopic confirmation as BL Lac sources, but no redshift solution. We detected hosts for 25/49 objects. As these galaxies have been argued to be standard candles, our measured host magnitudes provide redshift estimates (ranging from 0.2 to 1.0). Lower bounds are established on the redshifts of non-detections. The mean of the fit redshifts (and lower limits) is higher than those of spectroscopic solutions in the radio-loud and gamma-ray-loud parent samples, suggesting corrections may be needed for the luminosity function and evolution of these sources.

Abstract Copyright: ∼

Journal keyword(s): BL Lacertae objects: general - galaxies: active

Simbad objects: 49

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Number of rows : 49
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 ICRF J000404.9-114858 BLL 00 04 04.91500103 -11 48 58.3862126       19.09   ~ 57 1
2 QSO J0049+0237 BLL 00 49 43.23593957 +02 37 03.7785936 19.56 19.23 19.14 19.07   ~ 92 1
3 QSO B0048-09 BLL 00 50 41.3172421464 -09 29 05.210474100 16.74 16.39 16.22 16.14   ~ 460 2
4 4C 67.04 BLL 01 10 12.8719451560 +68 05 41.224178773           ~ 63 1
5 ICRF J020243.6+420516 BLL 02 02 43.65330020 +42 05 16.3330254       18.80   ~ 31 1
6 6C 015907+721900 BLL 02 03 33.38495695 +72 32 53.6673482     19.2 15.90   ~ 93 1
7 ICRF J021113.1+105134 BLL 02 11 13.1774921592 +10 51 34.798753116 13.96 13.63 13.40 15.42   ~ 137 1
8 ICRF J021921.1-184238 BLL 02 19 21.16176096 -18 42 38.7472956   19.5   18.30   ~ 43 1
9 ICRF J024330.8+712017 BLL 02 43 30.8913278232 +71 20 17.905675416     19.4 18.4   ~ 70 0
10 ICRF J034839.2-161017 BLL 03 48 39.2707791168 -16 10 17.753340180   18.32   16.02   ~ 58 1
11 QSO B0430+2859 BLL 04 33 37.82985981 +29 05 55.4770576   19.0 17.80 17.06   ~ 162 1
12 QSO B0459+135 BLL 05 02 33.21951873 +13 38 10.9588181   20.0 20.5 19.22   ~ 58 0
13 QSO J0509+0541 BLL 05 09 25.9644373872 +05 41 35.333820420 15.32 14.95 14.78 15.12   ~ 458 2
14 QSO J0527+0331 BLL 05 27 32.70544208 +03 31 31.5165613     20.00 18.43   ~ 60 1
15 7C 060336.10+474014.00 BLL 06 07 23.2550008416 +47 39 46.944292500       16.38   ~ 79 1
16 ICRF J061017.8-184740 Bla 06 10 17.8858288680 -18 47 40.089141708       17.29   ~ 47 0
17 2MASS J06125118+4122374 RS* 06 12 51.1851596976 +41 22 37.408102212       15.71   ~ 83 0
18 ICRF J062518.2+444001 BLL 06 25 18.26537500 +44 40 01.6261460     16.80 18.71   ~ 100 1
19 QSO B0647+250 BLL 06 50 46.4900658984 +25 02 59.625654828 16.17 15.97 15.79 16.3   ~ 156 2
20 2MASS J07124368+5033230 Mi* 07 12 43.6836455760 +50 33 22.708727208       18.68   ~ 93 1
21 ICRF J074305.1+171424 BLL 07 43 05.10681081 +17 14 24.4118780   18.89 18.32 19.12   ~ 30 0
22 7C 081008.69+644025.00 BLL 08 14 39.1902610224 +64 31 22.026175032       16.81   ~ 77 1
23 ICRF J081749.7-093330 BLL 08 17 49.7493705648 -09 33 30.523860972 18.38 17.96 17.61 17.51   ~ 71 1
24 2MASS J08354322+0937177 BLL 08 35 43.2119638416 +09 37 17.979053988       18.1   ~ 37 1
25 ICRF J090754.0-202649 AGN 09 07 54.04044022 -20 26 49.4749546       15.29   ~ 27 1
26 ICRF J090939.8+020005 BLL 09 09 39.8480034240 +02 00 05.263770168   20.23 19.68 18.62   ~ 71 1
27 Ton 397 BLL 09 15 52.4015550384 +29 33 24.042671532   16.79 16.39 16.085   ~ 224 1
28 ATO J148.2612-08.6717 BLL 09 53 02.7095643576 -08 40 18.360856776 16.99 16.73 16.69 17.4   ~ 76 0
29 QSO J1008+0621 BLL 10 08 00.81616040 +06 21 21.2160257 17.61 17.17 17.85 16.73   ~ 110 1
30 87GB 103431.3+572750 BLL 10 37 44.3078432736 +57 11 55.629345156   17.05 16.54 16.7   ~ 119 1
31 QSO B1056-112 BLL 10 59 12.4263597024 -11 34 22.779475140     17.5 16.2   ~ 79 0
32 Ton 116 BLL 12 43 12.7362011736 +36 27 43.997592204   17.41 17.11 16.4   ~ 103 1
33 6C 125058+531749 BLL 12 53 11.9204702472 +53 01 11.737422696   18.07 17.51 16.4   ~ 127 1
34 7C 1424+2401 BLL 14 27 00.3917926224 +23 48 00.037510776 14.52 14.34 14.95 14.5   ~ 367 1
35 2MASS J14405293+0610162 BLL 14 40 52.9387587024 +06 10 16.192432236 17.77 17.41 17.34     ~ 66 1
36 QSO B1542+614 BLL 15 42 56.9436243096 +61 29 55.346749080   16.9 16.25 16.6   ~ 136 1
37 7C 162332.79+565907.00 BLL 16 24 32.1794532480 +56 52 28.002722844   18.76 18.13 17.82   ~ 44 1
38 ICRF J174900.3+432151 BLL 17 49 00.36038214 +43 21 51.2873300     18.21 19.84   ~ 97 1
39 ICRF J181333.4+061542 BLL 18 13 33.4116177456 +06 15 42.035846688       17.48   ~ 65 1
40 ICRF J190311.6+554038 BLL 19 03 11.6077129056 +55 40 38.450387568   18.1   16.4   ~ 102 1
41 6C 192647+611105 BLL 19 27 30.4428785736 +61 17 32.878880988   17.5 17.5 16.99   ~ 126 1
42 4C 72.28 BLL 20 09 52.3047264984 +72 29 19.351077612   19.0   19.40   ~ 117 1
43 6C 202345+760123 BLL 20 22 35.5757966424 +76 11 26.171152728     18.10 17.54   ~ 97 1
44 QSO B2047+03 BLL 20 50 06.2404902768 +04 07 48.889251300   19.8   19.00   ~ 92 1
45 ICRF J220014.1+213757 BLL 22 00 14.1974732424 +21 37 57.038959488       19.04   ~ 32 1
46 ICRF J224107.2+412011 BLL 22 41 07.2051716400 +41 20 11.617123020       18.89   ~ 48 1
47 87GB 224130.7+200514 BLL 22 43 54.7436079792 +20 21 03.775386276     16.00 16.1   ~ 99 0
48 ICRF J230517.5+824249 BLL 23 05 17.53959611 +82 42 49.1559387       20.47   ~ 23 0
49 2MASS J23462556+8007552 BLL 23 46 25.6104840840 +80 07 55.238884896       19.51   ~ 22 1

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