2005ApJ...635..173S

Query : 2005ApJ...635..173S

2005ApJ...635..173S - Astrophys. J., 635, 173-179 (2005/December-2)

Imaging redshifts of BL Lacertae objects.

SBARUFATTI B., TREVES A. and FALOMO R.

Abstract (from CDS):

The HST snapshot imaging survey of 110 BL Lac objects (Urry et al.) has clearly shown that the host galaxies are massive and luminous ellipticals. The dispersion of the absolute magnitudes is sufficiently small that the measurement of the galaxy brightness becomes a valuable way of estimating their distance. This is illustrated by constructing a Hubble diagram of the 64 resolved objects with known redshift. By means of this relationship, we estimate the redshift of five resolved BL Lac objects of the survey that have no spectroscopic z. The adopted method also allows us to evaluate lower limits to the redshift for 13 objects of still unknown z using the lower limit on the host galaxy magnitude. This technique can be applied to any BL Lac object for which an estimate or a lower limit of the host galaxy magnitude is available. Finally, we show that the distribution of the nuclear luminosity of all the BL Lac objects of the survey indicates that the objects for which both the redshift and the host galaxy are undetected are among the most luminous, and possibly the most highly beamed.

Abstract Copyright: ∼

Journal keyword(s): Galaxies: BL Lacertae Objects: General

Simbad objects: 101

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Number of rows : 101
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 RX J0035.8+5950 BLL 00 35 52.6448284115 +59 50 04.513482441     19.5 17.2   ~ 195 1
2 QSO B0118-272 BLL 01 20 31.6628068344 -27 01 24.636341064   15.89 15.56 15.49   ~ 288 1
3 QSO B0122+09 BLL 01 24 44.5398641328 +09 18 49.289559588     19.98 18.5   ~ 58 0
4 1RXS J014126.8-092857 BLL 01 41 25.83216015 -09 28 43.6742470   16.94 16.55 17.21   ~ 302 1
5 QSO B0145+138 BLL 01 48 29.7013033536 +14 02 17.848330656     17.90 16.7   ~ 45 0
6 RX J0201.1+0034 BLL 02 01 06.1794930072 +00 34 00.135789564   18.99 18.42 18   ~ 113 0
7 RX J0232.8+2017 BLL 02 32 48.6148874688 +20 17 17.486717388     18.00 13.96   ~ 387 1
8 QSO B0235+1624 BLL 02 38 38.93010450 +16 36 59.2745528   16.46 15.50 15.92   ~ 1614 2
9 1RXS J030103.8+344109 BLL 03 01 03.7549027896 +34 41 01.078942128     18.53     ~ 63 0
10 RX J0319.8+1845 BLL 03 19 51.8082475320 +18 45 34.562475432           ~ 223 1
11 1RXS J033311.8-361942 BLL 03 33 12.2677895088 -36 19 46.662911112   19.94   17.99   ~ 59 0
12 QSO B0347-121 BLL 03 49 23.1862105584 -11 59 27.366035532   18.74 18.2 17.46   ~ 245 1
13 NVSS J035154-370341 BLL 03 51 54.5527158480 -37 03 44.193747492       16.4   ~ 48 1
14 PMN J0416+0105 BLL 04 16 52.4945693352 +01 05 23.899102620   16.86 16.38 16   ~ 302 1
15 1RXS J042218.2+195047 BLL 04 22 18.3397702069 +19 50 54.920278805           ~ 90 0
16 WISEA J042840.41-375619.3 BLL 04 28 40.4241894720 -37 56 19.580735832   18.96 19.0 17.21   ~ 343 1
17 RX J0507.9+6737 BLL 05 07 56.1631660632 +67 37 24.225299292       17.2   ~ 196 1
18 1RXS J050938.3-040037 BLL 05 09 38.1791014104 -04 00 45.682814376   19.10   17.92   ~ 78 0
19 ESO 362-21 BLL 05 22 57.98464178 -36 27 30.8512953   15.26 14.62 14.48   ~ 873 2
20 QSO B0537-441 BLL 05 38 50.36155950 -44 05 08.9390233   15.77 16.48 16   ~ 924 2
21 PKS J0550-3216 BLL 05 50 40.5705144672 -32 16 16.484718648   16.07 15.5     ~ 424 1
22 QSO B0607+710 BLL 06 13 43.3821991056 +71 07 26.779488276   19.6 19.61 19.1   ~ 82 0
23 1RXS J062338.8-525750 BLL 06 23 37.8767751144 -52 57 56.162758536       17.7   ~ 38 0
24 RX J0650.7+2502 BLL 06 50 46.4900658984 +25 02 59.625654828 16.17 15.97 15.79 16.3   ~ 175 2
25 RX J0710.5+5908 BLL 07 10 30.0683697888 +59 08 20.371772544   17.38 16.52 15.1   ~ 249 1
26 QSO B0715-259 BLL 07 18 04.8016416552 -26 08 11.601539664     18.00     ~ 17 0
27 8C 0716+714 BLL 07 21 53.4482942664 +71 20 36.363846516   15.5 15.50 14.27   ~ 1388 1
28 QSO J0738+1742 BLL 07 38 07.39375312 +17 42 18.9981506   16.76 16.22 15.78   ~ 1045 1
29 QSO B0737+744 BLL 07 44 05.3750968872 +74 33 58.256429832     16.89 16.6   ~ 144 0
30 4C 54.15 BLL 07 53 01.38457270 +53 52 59.6370830   18.5   16.77   ~ 173 1
31 QSO B0754+10 BLL 07 57 06.64295154 +09 56 34.8522544   15.43 15.00 15.99   ~ 461 1
32 RX J0809.8+5218 BLL 08 09 49.1868285744 +52 18 58.249938744   16.11 15.59 14.6   ~ 302 1
33 7C 081451.89+423206.00 BLL 08 18 15.99961476 +42 22 45.4148987   18.88 18.18 17.81   ~ 429 1
34 4C 22.21 BLL 08 23 24.7592164368 +22 23 03.287299236   20.22 19.57 19.7   ~ 186 1
35 QSO B0829+047 BLL 08 31 48.8770033992 +04 29 39.086842884   17.10 16.4 14.55   ~ 511 2
36 6C 082850+492334 BLL 08 32 23.21674252 +49 13 21.0382979   20.17 19.63     ~ 173 1
37 PG 0851+202 BLL 08 54 48.8749846272 +20 06 30.639583620   15.649 15.146 15.446   ~ 2513 1
38 7C 092302.70+745857.00 BLL 09 28 02.9215998024 +74 47 19.291770312   19.8 19.74 19.2   ~ 50 1
39 RX J0930.6+4950 BLL 09 30 37.5737660328 +49 50 25.549611036   18.81 18.25 17.3   ~ 128 0
40 6C 095456+654857 BLL 09 58 47.2451872176 +65 33 54.819354600     17.0 15.75   ~ 771 1
41 QSO B0958+210 BLL 10 01 42.4110018648 +20 48 18.289244880     19.84 18.6   ~ 33 0
42 RX J1015.0+4926 BLL 10 15 04.1396533776 +49 26 00.706055496   16.56 16.15 14.58   ~ 400 3
43 RX J1031.3+5053 BLL 10 31 18.5251007784 +50 53 35.817278064   17.25 16.98 16.3   ~ 210 2
44 RX J1047.7+5437 BLL 10 47 45.8223598944 +54 37 41.150886636   20.42 19.73 19.9   ~ 23 0
45 Z 184-50 BLL 11 04 27.3140835504 +38 12 31.798495872   13.50 12.90 8.31   ~ 2841 1
46 QSO B1106+244 BLL 11 09 16.1671846680 +24 11 20.151320064     18.7 17.4   ~ 52 0
47 QSO B1133+16 BLL 11 36 17.5377147576 +16 01 52.252739544     20.04 19.5   ~ 39 0
48 Z 334-43 BLL 11 36 26.4090783600 +70 09 27.309071232   15.16 14.49 10.51   ~ 394 1
49 QSO B1144-3755 BLL 11 47 01.37071212 -38 12 11.0235229   19.03 16.2 16.72   ~ 320 1
50 7C 1147+2434 BLL 11 50 19.21218244 +24 17 53.8352318   16.26 15.74 15.80   ~ 294 1
51 RX J1210.3+3929 BLL 12 10 26.5907045256 +39 29 08.635546104   20.77 20.3 19.9   ~ 116 0
52 PMN J1215+0732 BLL 12 15 10.9765816512 +07 32 04.676330688     16.0 14.8   ~ 114 1
53 Ton 605 HB* 12 16 53.6748432768 +30 04 08.692883544   16.110 15.98     B 223 0
54 RX J1217.8+3007 BLL 12 17 52.0819904040 +30 07 00.634936872   16.07 15.62 13.47   G7 516 1
55 PG 1218+304 BLL 12 21 21.9426947832 +30 10 37.158534012   16.50 15.85 15.7   ~ 497 1
56 RX J1224.4+2436 BLL 12 24 24.1862962656 +24 36 23.499792828   17.93 17.37     ~ 162 1
57 QSO B1229+6430 BLL 12 31 31.3949261640 +64 14 18.280701600   18.36 17.62 14.3   ~ 160 2
58 RX J1241.8+0636 BLL 12 41 48.2721377400 +06 36 01.127632284   18.97 18.52 19.4   ~ 52 0
59 LB 2449 BLL 12 48 18.7847605224 +58 20 28.717260720   16.10 15.78 15.19   ~ 215 1
60 1RXS J125135.2-295824 BLL 12 51 34.8343469232 -29 58 43.146193476       18.5   ~ 32 0
61 NAME 1ES 1249+17.4W Bla 12 51 46.740 +17 11 13.93     18.5 18.4   ~ 17 1
62 RX J1257.5+2412 BLL 12 57 31.9330943592 +24 12 40.164677136       15.7   ~ 91 0
63 RX J1404.8+0402 BLL 14 04 50.9113762032 +04 02 02.209070292   16.93 16.61     ~ 142 1
64 RX J1409.3+5939 BLL 14 09 23.4933928320 +59 39 40.624242444   19.60 19.05     ~ 83 1
65 6C 141804+543700 BLL 14 19 46.5974051952 +54 23 14.787857796   16.17 15.65 14.16   ~ 630 1
66 RX J1422.6+5801 BLL 14 22 38.8822521768 +58 01 55.514940024   18.49 18.15 17.7   ~ 86 0
67 PG 1424+240 BLL 14 27 00.3917926224 +23 48 00.037510776 14.52 14.34 14.95 14.5   ~ 420 1
68 RX J1428.5+4240 BLL 14 28 32.6090008440 +42 40 21.048123396   16.95 16.45 14.4   ~ 549 1
69 PG 1437+398 BLL 14 39 17.4789214824 +39 32 42.807064020   17.36 17.10 16.5   ~ 125 2
70 RX J1442.8+1200 BLL 14 42 48.2771008152 +12 00 40.348597716   18.34 17.63 15.2   ~ 189 1
71 RX J1501.0+2238 BLL 15 01 01.8350446584 +22 38 06.373155444   16.29 15.79     ~ 139 1
72 ESO 514-1 BLL 15 17 41.8134049824 -24 22 19.482207024   15.13 14.00 13.95   ~ 815 3
73 RX J1517.7+6525 BLL 15 17 47.5882526184 +65 25 23.285593704       16.7   ~ 131 1
74 QSO B1519-273 BLL 15 22 37.67599511 -27 30 10.7855131   18.72 18.5 17.42   ~ 313 1
75 RX J1535.0+5320 BLL 15 35 00.7962236712 +53 20 37.302992988   19.18 18.75 18.8   ~ 73 1
76 RX J1536.7+0137 BLL 15 36 46.7546783544 +01 38 00.077346276           ~ 72 1
77 RX J1540.2+8155 BLL 15 40 15.8786533752 +81 55 05.781420660       15.8   ~ 90 1
78 4C 14.60 BLL 15 40 49.49151924 +14 47 45.8846989   17.72 17.30 17.240   ~ 448 1
79 PG 1553+113 BLL 15 55 43.0440048528 +11 11 24.365649948 14.91 14.72 14.57 13.99   ~ 672 1
80 Z 225-7 BLL 16 53 52.21668403 +39 45 36.6088754 14.09 14.15 13.29 8.26   ~ 2304 2
81 RX J1705.5+6042 BLL 17 05 34.8446318376 +60 42 15.870294504           ~ 59 0
82 RX J1725.0+1152 BLL 17 25 04.3409350008 +11 52 15.471967296   16.29 15.77 14.45   ~ 221 1
83 ZW I 187 BLL 17 28 18.6242294352 +50 13 10.469553996   16.55 15.97 12.95   ~ 396 1
84 7C 173836.20+473929.00 BLL 17 39 57.12907095 +47 37 58.3614787   18.5 19.5 18.88   ~ 147 2
85 QSO B1745+502 BLL 17 46 32.3255876088 +50 28 10.311214152       19.4   ~ 13 0
86 RX J1748.5+7005 BLL 17 48 32.8402992264 +70 05 50.768819304   17.46 17.01 15.48   ~ 456 2
87 4C 09.57 BLL 17 51 32.81857326 +09 39 00.7284066   17.46 16.78 15.57   ~ 1007 1
88 RX J1757.2+7033 BLL 17 57 13.0521071712 +70 33 37.820087172       18   ~ 87 1
89 PMN J1917-1921 BLL 19 17 44.8192343976 -19 21 31.608315216       15.24   ~ 135 1
90 PKS J2009-4849 BLL 20 09 25.3903899240 -48 49 53.725051056   15.75 12.81 11.41   ~ 604 1
91 RX J2039.3+5219 BLL 20 39 23.5181915742 +52 19 50.035414651     19.0 16.2   ~ 84 1
92 4C -02.81 BLL 21 34 10.30958988 -01 53 17.2389056   18.6 19.00 18.87   ~ 431 1
93 PMN J2145+0720 BLL 21 45 52.2999532008 +07 19 27.205685508       16   ~ 120 1
94 QSO B2150+173 BLL 21 52 24.81939266 +17 34 37.7950210     17.9 17.98   ~ 186 2
95 NAME BL Lac BLL 22 02 43.2913536816 +42 16 39.979416792   15.66 14.72     ~ 2397 1
96 Z 403-19 BLL 22 04 17.6521146096 +04 40 02.027503020   16.20 15.2 10.2   ~ 223 2
97 QSO B2240-260 BLL 22 43 26.4084975168 -25 44 30.680406312   18.59   16.80   ~ 205 1
98 QSO B2254+0727 BLL 22 57 17.30311778 +07 43 12.3025633   17.07 16.36     ~ 317 1
99 QSO B2326+174 BLL 23 29 03.3191370096 +17 43 30.526001112     16.8 16.7   ~ 33 2
100 QSO B2344+514 BLL 23 47 04.8372110928 +51 42 17.877513168     15.50 10.7   ~ 500 1
101 QSO B2356-309 BLL 23 59 07.9034996184 -30 37 40.671098544   18.414 16.44 16.795   ~ 318 2

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