1999MNRAS.308.1096L


C.D.S. - SIMBAD4 rel 1.7 - 2020.07.12CEST14:58:06

1999MNRAS.308.1096L - Mon. Not. R. Astron. Soc., 308, 1096-1116 (1999/October-1)

Optical spectroscopy of two overlapping, flux-density-limited samples of radio sources in the North Ecliptic Cap, selected at 38 and 151 MHz.

LACY M., RAWLINGS S., HILL G.J., BUNKER A.J., RIDGWAY S.E. and STERN D.

Abstract (from CDS):

We present the results of optical spectroscopy of two flux-density-limited samples of radio sources selected at frequencies of 38 and 151MHz in the same region around the North Ecliptic Cap, the 8C-NEC and 7C-iii samples respectively. Both samples are selected at flux density levels ~20 times fainter than samples based on the 3C catalogue. They are amongst the first low-frequency selected samples with no spectral or angular size selection for which almost complete redshift information has been obtained, and contain many of the lowest-luminosity z>2 radio galaxies so far discovered. They will therefore provide a valuable resource for understanding the cosmic evolution of radio sources and their hosts and environments. The 151-MHz 7C-iii sample is selected to have S151≥0.5Jy and is the more spectroscopically complete; out of 54 radio sources fairly reliable redshifts have been obtained for 44 objects. The 8C sample has a flux limit of S38≥1.3Jy and contains 58 sources of which 46 have fairly reliable redshifts. We discuss possible biases in the observed redshift distribution, and some interesting individual objects, including a number of cases of probable gravitational lensing. Using the 8C-NEC and 7C-iii samples in conjunction, we form the first sample selected on low-frequency flux in the rest-frame of the source, rather than the usual selection on flux density in the observed frame. This allows us to remove the bias associated with an increasing rest-frame selection frequency with redshift. We investigate the difference this selection makes to correlations of radio source properties with redshift and luminosity by comparing the results from traditional flux-density selection with our new method. We show in particular that flux-density-based selection leads to an overestimate of the steepness of the correlation of radio source size with redshift.

Abstract Copyright: 1999, Royal Astronomical Society

Journal keyword(s): galaxies: active - galaxies: evolution - gravitational lensing - radio continuum: galaxies

Simbad objects: 157

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Number of rows : 157

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 3C 6.1 rG 00 16 31.60 +79 16 51.7   22       ~ 114 1
2 2C 26 QSO 00 20 25.2227767358 +15 40 54.766010557   17.92 17.62     ~ 317 1
3 3C 20 Sy2 00 43 09.6 +52 03 35   19.0       ~ 200 0
4 87GB 005314.6+260945 BiC 00 55 50.583 +26 24 36.68   18.63   16.26   ~ 196 1
5 2C 94 Sy2 01 08 52.8701245540 +13 20 14.257796477   15.19       ~ 440 2
6 3C 33.1 Sy1 01 09 44.3 +73 11 57   19.5       ~ 137 1
7 3C 34.0 rG 01 10 18.60 +31 47 20.0   21       ~ 160 2
8 3C 35 QSO 01 12 02.216 +49 28 35.24     15.6     ~ 137 0
9 2E 437 Sy1 01 36 24.4206016519 +20 57 27.523115842   18.15 18.10     ~ 345 2
10 3C 55.0 rG 01 57 10.7 +28 51 40   20.8       ~ 144 1
11 3C 61.1 Sy2 02 22 48.3 +86 18 51     19.0     ~ 181 1
12 3C 68.2 rG 02 34 23.80 +31 34 17.0   24       ~ 126 1
13 3C 79.0 Sy2 03 10 00.0932580214 +17 05 58.593728115   19.54 18.75     ~ 242 3
14 2C 349 Sy2 03 58 54.4385123848 +10 26 02.820631972   16.68 15.41     ~ 321 2
15 ICRF J041340.3+111214 Sy1 04 13 40.3430536536 +11 12 14.788657086   18.96 18.01     ~ 294 2
16 NAME Per B AGN 04 37 04.37510272 +29 40 13.8184969   21.7       ~ 470 2
17 3C 132 rG 04 56 42.922 +22 49 23.06   18.5       ~ 143 1
18 ICRF J054236.1+495107 Sy1 05 42 36.13789843 +49 51 07.2337251   18.45 17.80 17.210   ~ 1266 1
19 2C 524 Sy2 06 09 32.701768 +48 04 17.04207   21.198 18.00 18.767   ~ 171 1
20 3C 172 rG 07 02 08.31 +25 13 53.5   20.5       ~ 114 0
21 3C 173.1 rG 07 09 18.124 +74 49 31.80   19.982 18.9 17.540   ~ 127 1
22 2E 1790 Sy1 07 13 02.3 +11 46 15   17.06 16.60     ~ 254 1
23 3C 184 rG 07 39 24.40 +70 23 10.0   21.5       ~ 132 1
24 7C 073432.79+803253.00 Sy1 07 43 01.4 +80 26 26     17.0     ~ 170 1
25 7C 074056.70+380030.00 QSO 07 44 17.4723761217 +37 53 17.249506697   17.5 18.14 17.2   ~ 278 1
26 4C 56.16 rG 07 49 48.1 +55 54 19           ~ 165 1
27 2XMM J080535.0+240951 Sy2 08 05 35.0057673498 +24 09 50.334614040   15.46       ~ 312 1
28 3C 196 Sy1 08 13 36.056090 +48 13 02.63597   18.36 17.79     ~ 482 2
29 3C 200 rG 08 27 25.4 +29 18 45   20       ~ 164 1
30 7C 083318.00+652404.00 QSO 08 37 45.0013672499 +65 13 35.310289376   18.76 18.21     ~ 169 1
31 ICRF J084047.5+131223 Sy1 08 40 47.58841798 +13 12 23.5641152   18.58 18.15 17.622   ~ 385 1
32 3C 208 QSO 08 53 08.6094064845 +13 52 54.843245472   17.76 17.42     ~ 235 1
33 ICRF J090933.4+425346 Sy2 09 09 33.49711097 +42 53 46.4818256   19.98 19.42 18.220   ~ 462 0
34 3C 219 Sy1 09 21 08.6263828902 +45 38 57.345842278   19.56 18.69     ~ 385 2
35 3C 220.1 rG 09 32 39.4 +79 06 30   20.5       ~ 129 1
36 3C 220.3 G 09 39 23.40 +83 15 26.2   20.5   20.140   ~ 87 1
37 7C 093653.10+360601.00 Sy2 09 39 52.7593482853 +35 53 58.921088539   19.51 18.60     ~ 255 1
38 3C 225 rG 09 42 15.4 +13 45 51   19 20.0     ~ 116 2
39 3C 226.0 Sy1 09 44 16.5 +09 46 16   19.5       ~ 123 2
40 7C 094437.60+732735.00 Sy2 09 49 45.967 +73 14 23.25   16.00   11.7   ~ 97 1
41 3C 228 rG 09 50 10.7 +14 19 58   21       ~ 157 2
42 7C 095855.89+290131.00 Sy1 10 01 49.5226070599 +28 47 08.913353395   18.21 17.27     ~ 396 1
43 3C 239 rG 10 11 45.6 +46 28 20   22.5       ~ 144 1
44 3C 244.1 QSO 10 33 33.982 +58 14 35.85   19.0 19.0     ~ 174 1
45 7C 110025.60+771511.00 Sy1 11 04 13.8613944317 +76 58 58.192391742   15.70 15.72 15.40   ~ 510 1
46 3C 252.0 G 11 11 32.0 +35 40 45   22       ~ 119 1
47 3C 254 QSO 11 14 38.7251514286 +40 37 20.333882148   17.62 17.42     ~ 301 2
48 7C 113710.40+660425.00 Sy1 11 39 57.0253396181 +65 47 49.482487703   16.50 16.32     ~ 490 1
49 3C 263.1 QSO 11 43 25.083 +22 06 56.08   20       ~ 136 1
50 3C 265.0 Sy1 11 45 29.0 +31 33 50   20.0       ~ 237 0
51 3C 267 rG 11 49 56.5 +12 47 19   22.5       ~ 146 2
52 3C 268.1 rG 12 00 19.2 +73 00 46   22       ~ 142 1
53 3C 274.1 rG 12 35 31.00 +21 20 51.3   20       ~ 135 1
54 3C 275.1 QSO 12 43 57.6490661384 +16 22 53.396063536   19.23 19.00     ~ 282 1
55 3C 277.2 Sy1 12 53 33.3 +15 42 31   21.5       ~ 145 0
56 2C 1066 SyG 12 56 57.9 +47 20 20   22.0       ~ 268 0
57 4C 64.19 rG 13 50 42.04 +64 29 30.0   20.7 20.7 21.1   ~ 76 1
58 UGC 8782 LIN 13 52 17.765 +31 26 46.10   16.10 15.10     ~ 420 3
59 3C 294 rG 14 06 44.00 +34 11 25.0           ~ 216 1
60 3C 295 Sy2 14 11 20.467 +52 12 09.52   22.34 20.80 18.54   ~ 896 5
61 3C 300 AGN 14 22 59.9 +19 35 37   19.66 18.73     ~ 184 2
62 ICRF J145907.5+714019 Sy1 14 59 07.5831170610 +71 40 19.867413302   17.24 16.78 17.2   ~ 450 1
63 VV 204 AGN 15 04 57.120 +26 00 58.46   15.24       ~ 274 0
64 3C 319.0 rG 15 24 05.60 +54 28 18.4   18.5       ~ 143 1
65 3C 321 Sy2 15 31 43.473 +24 04 18.93   16.0   15.40   ~ 307 1
66 3C 324.0 Sy1 15 49 48.9 +21 25 38   21.5       ~ 300 0
67 7C 154914.09+625020.00 QSO 15 49 59.2 +62 41 18   21.92 20.70     ~ 131 2
68 2MASX J15520913+2005477 G 15 52 09.137 +20 05 47.70   17.87 17.08     ~ 136 1
69 2MASX J15520920+2005237 rG 15 52 09.1940108214 +20 05 23.184343350   17.87 17.08     ~ 126 2
70 3C 326 Rad 15 52 26.60 +20 06 00.0   17.87 17.08     ~ 208 3
71 NAME 3C 330G2 Sy2 16 09 35.0 +65 56 39   20.33       ~ 253 1
72 2E 3648 Sy1 16 20 21.8184966430 +17 36 23.952696503   16.53 16.41 20.5   ~ 388 2
73 3C 349 rG 16 59 32.00 +47 02 16.0   19 19.0     ~ 147 1
74 6C 170404+604844 Sy1 17 04 41.3742389551 +60 44 30.522600868   15.65 15.40 15.30   ~ 723 1
75 7C 1731+6641 rG 17 31 44.4 +66 38 57           ~ 6 0
76 7C 1732+6715 Rad 17 32 47.6 +67 13 59           ~ 3 0
77 7C 173246.79+653526.00 QSO 17 32 53.9946847051 +65 33 25.206807973   17.71 17.38     ~ 33 1
78 7C 1733+6719 AGN 17 32 54.7 +67 17 36           ~ 6 0
79 NVSS J173637+650232 rG 17 36 37.20 +65 02 32.7           ~ 11 1
80 7C 173643.90+671017.00 Rad 17 36 39.9 +67 08 35           ~ 4 0
81 NVSS J174042+663844 rG 17 40 42.4 +66 38 44           ~ 11 1
82 7C 1741+6704 G 17 41 07.80 +67 03 14.5           ~ 8 1
83 7C 1742+6346 Rad 17 43 04.7 +63 45 09           ~ 4 0
84 7C 1743+6344 G 17 43 23.096 +63 42 58.62           ~ 5 0
85 7C 1743+6431 G 17 43 42.58 +64 30 18.9           ~ 9 1
86 7C 174357.50+663923.00 G 17 43 56.982 +66 38 13.84           ~ 10 1
87 87GB 174504.4+641541 Sy2 17 45 22.9 +64 14 24           ~ 13 1
88 7C 174556.60+662415.00 Rad 17 45 57.8 +66 23 14           ~ 5 0
89 87GB 174550.5+642251 SyG 17 46 06.67810 +64 21 49.6604           ~ 19 1
90 4C 65.22 QSO 17 47 13.910 +65 32 35.59     21.2     ~ 21 1
91 8C 1748+670 G 17 48 09.30 +67 03 03.5           ~ 12 1
92 7C 174817.40+665716.00 Rad 17 48 14.4 +66 56 25           ~ 4 0
93 7C 174843.60+673125.00 G 17 48 43.242 +67 30 45.20           ~ 7 0
94 8C 1751+681C Rad 17 50 22.522 +68 04 52.64           ~ 3 0
95 7C 1751+6809 rG 17 50 49.859 +68 08 25.97           ~ 15 0
96 8C 1751+676 G 17 50 54.6 +67 41 16           ~ 5 1
97 NVSS J175152+645431 Rad 17 51 52.80 +64 54 31.9           ~ 8 1
98 NVSS J175331+662724 Rad 17 53 31.5 +66 27 25           ~ 6 1
99 NVSS J175335+631048 rG 17 53 35.20 +63 10 48.0           ~ 12 1
100 7C 175336.29+654308.00 BLL 17 53 42.0914258693 +65 42 39.804916332           ~ 18 1
101 7C 175412.20+642040.00 Rad 17 54 26.722 +64 20 11.76           ~ 7 0
102 8C 1754+631 QSO 17 54 58.693 +63 10 54.64     21.10     ~ 7 0
103 NVSS J175539+683036 Rad 17 55 38.00 +68 32 12.9           ~ 10 1
104 NVSS J175557+631411 Rad 17 55 57.80 +63 14 11.1           ~ 7 1
105 NVSS J175705+651953 rG 17 57 05.5 +65 19 54           ~ 28 2
106 8C 1757+676 AGN 17 57 44.60 +67 41 11.0           ~ 9 1
107 NVSS J175824+653537 Rad 17 58 18.20 +65 35 09.5           ~ 10 1
108 7C 1758+6553 G 17 58 31.38 +65 53 58.2           ~ 6 1
109 7C 1758+6719 rG 17 58 47.189 +67 19 46.01           ~ 9 0
110 7C 175835.10+630755.00 QSO 17 58 57.4 +63 07 48     21.10     ~ 11 1
111 7C 1801+6902 QSO 18 01 14.6357378166 +69 02 43.698237670     19.4     ~ 17 1
112 4C 13.66 G 18 01 38.96 +13 51 23.9           ~ 46 1
113 7C 1802+6456 rG 18 02 22.071 +64 56 44.93           ~ 11 0
114 8C 1803+661 rG 18 03 50.851 +66 05 19.02           ~ 11 0
115 7C 1804+6625 QSO 18 04 37.0955048535 +66 25 30.582465836     20.20     ~ 10 1
116 3C 368.0 rG 18 05 06.30 +11 01 32.0   21.5       ~ 241 1
117 NVSS J180512+631335 Rad 18 05 10.80 +63 13 42.0           ~ 8 1
118 NVSS J180556+633313 rG 18 05 57.1 +63 33 14           ~ 19 1
119 7C 180706.40+683110.00 G 18 06 50.20 +68 31 40.0           ~ 13 1
120 NVSS J180713+671943 rG 18 07 13.38 +67 19 42.0           ~ 10 1
121 7C 180747.20+684125.00 G 18 07 29.90 +68 41 55.1           ~ 10 1
122 8C 1808+677 G 18 07 48.553 +67 44 05.78           ~ 3 0
123 7C 1811+6321 G 18 11 54.73 +63 22 50.3           ~ 7 1
124 NVSS J181203+681457 Rad 18 12 02.66 +68 14 56.2           ~ 7 1
125 7C 1813+6846 QSO 18 12 44.2203486524 +68 47 35.499925101     19.70     ~ 12 0
126 7C 1813+6439 QSO 18 13 56.029 +64 40 47.83     22.00     ~ 11 1
127 NVSS J181412+670344 rG 18 14 12.60 +67 03 43.0       24.1   ~ 13 1
128 8C 1814+657 QSO 18 14 34.6913581366 +65 51 29.539746943     20.0     ~ 7 0
129 7C 1814+6529 Rad 18 15 06.1 +65 30 51           ~ 3 0
130 6C 181539+680522 Sy1 18 15 24.9534226992 +68 06 31.991465184           ~ 15 1
131 7C 1815+6815 Rad 18 15 28.932 +68 18 33.00           ~ 8 0
132 4C 67.28 G 18 16 26.10 +67 12 10.0           ~ 11 1
133 87GB 181655.2+660517 G 18 16 58.40 +66 06 17.0           ~ 10 1
134 7C 181929.40+655032.00 G 18 19 34.60 +65 51 54.0           ~ 9 1
135 NVSS J182037+665842 Rad 18 20 37.36 +66 58 41.8           ~ 6 1
136 7C 182105.40+644201.00 Rad 18 21 18.4 +64 43 34           ~ 3 0
137 8C 1821+643B GiC 18 21 55.16 +64 21 17.6   19.0       ~ 8 0
138 ClG 1821+64 ClG 18 21 56.7276 +64 20 55.841           ~ 492 1
139 2E 4066 Sy1 18 21 57.2365 +64 20 36.226   14.23 14.24     ~ 534 1
140 7C 182258.90+660150.00 G 18 23 02.768 +66 03 25.21           ~ 6 0
141 7C 1825+6602 Rad 18 25 51.633 +66 04 16.10           ~ 6 0
142 7C 182640.70+670449.00 Sy1 18 26 37.5376520871 +67 06 44.730395491     17.70     ~ 22 1
143 7C 182631.60+651044.00 G 18 26 41.20 +65 12 43.0           ~ 10 1
144 7C 182729.60+670952.00 G 18 27 26.490 +67 11 46.37           ~ 6 0
145 7C 182759.40+651744.00 Rad 18 28 08.9 +65 19 46           ~ 3 0
146 ICRF J182931.7+484446 Sy1 18 29 31.7812801678 +48 44 46.158815781   17.05 16.81 16.860   ~ 629 1
147 2MASX J18334627+4727027 Sy1 18 33 46.2946109378 +47 27 02.568353862   18.64 17.24     ~ 194 1
148 ICRF J183503.3+324146 Sy1 18 35 03.3896681512 +32 41 46.856048508   16.50 15.39 10.50   ~ 578 1
149 ICRF J184208.9+794617 Sy1 18 42 08.9910523393 +79 46 17.129210139   16.06 15.38     ~ 1207 0
150 3C 388.0 SyG 18 44 02.417 +45 33 29.81   16.91 15.56     ~ 301 1
151 3C 401 SyG 19 40 25.2 +60 41 34   19.1       ~ 193 1
152 3C 427.1 rG 21 04 07.3 +76 33 08   23.3 21.1     ~ 145 1
153 3C 436 AGN 21 44 11.720 +28 10 18.86   18.5       ~ 174 1
154 2MASX J21555232+3800285 SyG 21 55 52.324 +38 00 28.51   19.20       ~ 214 1
155 NGC 7237 BiC 22 14 46.885 +13 50 27.13   15       ~ 87 1
156 3C 452 Sy2 22 45 48.787 +39 41 15.36   17.60 16.56     ~ 338 1
157 3C 457 QSO 23 12 07.590 +18 45 41.51   19.5       ~ 89 1

    Equat.    Gal    SGal    Ecl

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2020.07.12-14:58:06

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