2006MNRAS.366.1265B

Query : 2006MNRAS.366.1265B

2006MNRAS.366.1265B - Mon. Not. R. Astron. Soc., 366, 1265-1288 (2006/March-2)

CENSORS: A Combined EIS-NVSS Survey of Radio Sources - II. Infrared imaging and the K-z relation.

BROOKES M.H., BEST P.N., RENGELINK R. and ROETTGERING H.J.A.

Abstract (from CDS):

The Combined EIS-NVSS Survey of Radio Sources (CENSORS) is a 1.4-GHz radio survey selected from the National Radio Astronomy Observatories (NRAO) Very Large Array (VLA) Sky Survey (NVSS) and complete to a flux density of 7.2mJy. It targets the European Southern Observatory (ESO) Imaging Survey (EIS) Patch D, which is a 3x2-deg2 field centred on right ascension 09h51m36s.0 and declination -21°00'00{Prime} (J2000). This paper presents K-band imaging of 142 of the 150 CENSORS sources. The primary motivation for beginning infrared imaging of the sample was to identify the host galaxies of ∼30 per cent of sources for which the EIS I-band imaging failed to produce a likely candidate. In addition, K-band magnitudes allow photometric redshift estimation and I - K colours aid the identification of host galaxies (which are typically old, red ellipticals). Of the sources observed in the I and K bands, four remain undetected, possibly indicating high redshifts for the host galaxies, and eight involve complicated radio structures, or several candidate host galaxies, which have yet to be resolved. Thus, the host galaxy identifications are brought to 92 per cent completeness.

In conjunction with spectroscopic observations, the K-band magnitudes have been aperture corrected and used to establish a K-z relation for the CENSORS radio galaxies. This relation is of interest because of its variation, at z > 1, between radio surveys of different flux-density limit. Establishing this relation for CENSORS may shed light on the origin of this variation and will allow an appropriate K-z redshift estimator for any CENSORS source which remains without a spectroscopic redshift. It is shown that whilst the K-z relation for CENSORS is fainter than that of 3CRR at all redshifts, it agrees well with that of 7C over all redshifts studied.


Abstract Copyright: 2006 The Authors. Journal compilation © 2006 RAS

Journal keyword(s): surveys - galaxies: active - radio continuum: galaxies

VizieR on-line data: <Available at CDS (J/MNRAS/366/1265): table1.dat table2.dat table4.dat notes.dat>

CDS comments: Tables 2, 3: the possible optical counterparts (Nos A-E) for CENSORS 70 are not in SIMBAD.

Simbad objects: 160

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Number of rows : 160
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 2MASS J00362964+3742554 * 00 36 29.6500509504 +37 42 55.645352496   15.37 14.32     K2 7 0
2 Feige 11 HS* 01 04 21.6747168600 +04 13 37.054495956 10.847 11.826 12.065 12.183 12.324 sdB2VIHe4 136 0
3 2MASS J06594676-0454337 * 06 59 46.7677690512 -04 54 33.667785144   15.41 14.21     K3 6 0
4 LP 666-11 PM* 08 54 12.3397218238 -08 05 00.233297462   19.16 17.156 15.516 13.448 M6.0V 28 0
5 TYC 2495-850-1 SB* 09 03 20.5060339104 +34 21 02.624451660   12.76 11.99     G8 15 0
6 FS 126 * 09 19 18.7473060994 +10 55 51.103208669   15.620 14.463 14.113   K3 9 0
7 NVSS J094519-214239 Rad 09 45 19.26 -21 42 45.8           ~ 5 1
8 NVSS J094520-220118 Rad 09 45 20.46 -22 01 21.6           ~ 5 1
9 NVSS J094521-204318 Rad 09 45 21.17 -20 43 18.3           ~ 4 0
10 NVSS J094522-203612 Rad 09 45 22.09 -20 36 12.9           ~ 4 0
11 NVSS J094526-215457 rG 09 45 26.51 -21 54 57.3           ~ 4 0
12 NVSS J094526-203352 rG 09 45 26.88 -20 33 52.8         16.73 ~ 6 1
13 NVSS J094527-205747 Rad 09 45 27.50 -20 57 47.8           ~ 4 0
14 NVSS J094529-211848 rG 09 45 29.03 -21 18 54.8           ~ 6 1
15 NVSS J094538-211112 rG 09 45 38.34 -21 11 12.1           ~ 5 0
16 CENSORS 52 QSO 09 45 42.7 -21 15 43           ~ 5 0
17 NVSS J094548-215908 rG 09 45 48.05 -21 59 07.2           ~ 5 1
18 NVSS J094552-201441 rG 09 45 52.01 -20 14 41.8           ~ 5 0
19 NVSS J094556-212048 Rad 09 45 55.87 -21 20 50.2           ~ 5 1
20 NVSS J094556-202831 Rad 09 45 56.53 -20 28 31.3         16.41 ~ 6 1
21 WISH B0943.6-2102 QSO 09 45 57.079 -21 16 47.56   23.38 23.54     ~ 8 1
22 NVSS J094602-215140 Rad 09 46 02.57 -21 51 40.4           ~ 4 0
23 NVSS J094604-211508 Rad 09 46 04.37 -21 15 15.8           ~ 6 1
24 NVSS J094618-203758 rG 09 46 18.92 -20 37 58.4         17.41 ~ 5 0
25 NVSS J094631-202610 rG 09 46 31.15 -20 26 12.7           ~ 5 1
26 NVSS J094641-202926 rG 09 46 41.10 -20 29 27.5           ~ 7 1
27 NVSS J094649-211647 rG 09 46 49.75 -21 16 47.0           ~ 4 0
28 PMN J0946-2020 rG 09 46 50.21144168 -20 20 44.4538240           ~ 19 1
29 NVSS J094651-205317 Rad 09 46 51.453 -20 53 14.81           ~ 7 1
30 NVSS J094703-205002 rG 09 47 03.30 -20 50 04.8           ~ 6 1
31 NVSS J094710-203553 Rad 09 47 10.23 -20 35 53.0           ~ 6 1
32 NVSS J094724-210505 rG 09 47 24.86 -21 05 01.7           ~ 10 1
33 CENSORS 10 QSO 09 47 27.0028789920 -21 26 34.121075028   19.15 18.73     ~ 7 1
34 NVSS J094728-212835 Rad 09 47 28.89 -21 28 35.8           ~ 4 0
35 NVSS J094734-212658 Rad 09 47 34.67 -21 26 58.5           ~ 4 0
36 NVSS J094744-211229 rG 09 47 44.72 -21 12 29.8           ~ 4 0
37 NVSS J094746-212744 Rad 09 47 46.11 -21 27 44.3           ~ 4 0
38 NVSS J094748-210044 QSO 09 47 47.9 -21 00 45           ~ 5 0
39 NVSS J094748-204835 rG 09 47 48.82 -20 48 35.2           ~ 7 1
40 NVSS J094750-214217 Rad 09 47 50.04 -21 42 17.2           ~ 4 0
41 NVSS J094753-214719 Rad 09 47 53.64 -21 47 19.2           ~ 4 0
42 NVSS J094758-212150 Rad 09 47 58.95 -21 21 52.7           ~ 5 1
43 NVSS J094801-200911 Rad 09 48 01.68 -20 09 14.1           ~ 5 1
44 NVSS J094804-214736 Rad 09 48 04.06 -21 47 36.5           ~ 5 1
45 NVSS J094804-203435 Rad 09 48 04.23 -20 34 35.9           ~ 5 0
46 NVSS J094810-200158 Rad 09 48 10.05 -20 01 58.1           ~ 5 0
47 NVSS J094813-195954 rG 09 48 13.10 -19 59 54.7           ~ 4 0
48 CENSORS 29 QSO 09 48 15.7300060776 -21 40 06.449631996   19.23 19.02     ~ 7 1
49 NVSS J094822-210508 Rad 09 48 22.17 -21 05 08.4           ~ 4 0
50 CENSORS 39 QSO 09 48 36.10 -21 06 23.7   21.61 21.73     ~ 6 1
51 NVSS J094842-215226 Rad 09 48 42.39 -21 52 27.2           ~ 5 1
52 NVSS J094855-210357 Rad 09 48 55.38 -21 03 58.5           ~ 4 1
53 NVSS J094859-205007 Rad 09 48 59.96 -20 50 07.9           ~ 5 1
54 NVSS J094902-211504 Rad 09 49 02.26 -21 15 05.0           ~ 4 0
55 NVSS J094902-201609 Rad 09 49 02.62 -20 16 09.8           ~ 4 0
56 ESO 566-14 Sy1 09 49 10.832 -20 21 53.00   14.86   13.98   ~ 41 0
57 NVSS J094912-220029 Rad 09 49 12.22 -22 00 29.2           ~ 4 0
58 NVSS J094918-205452 rG 09 49 18.12 -20 54 52.5         17.10 ~ 6 1
59 CENSORS 37 QSO 09 49 19.80 -21 51 36.4   24.52 24.55     ~ 7 1
60 NVSS J094922-211819 Rad 09 49 22.34 -21 18 19.5           ~ 6 1
61 NVSS J094924-211110 rG 09 49 24.70 -21 11 10.0           ~ 6 1
62 NVSS J094925-200518 rG 09 49 25.57 -20 05 22.7           ~ 6 1
63 NVSS J094925-203724 rG 09 49 25.95 -20 37 24.5           ~ 6 0
64 NVSS J094929-212938 Rad 09 49 29.71 -21 29 38.8           ~ 5 0
65 NVSS J094930-202333 rG 09 49 30.67 -20 23 30.3           ~ 6 1
66 NVSS J094933-212707 Rad 09 49 33.24 -21 27 07.7           ~ 4 0
67 NVSS J094935-215808 Rad 09 49 35.26 -21 58 08.4           ~ 4 0
68 NVSS J094935-215623 rG 09 49 35.38 -21 56 23.2         18.28 ~ 6 0
69 NVSS J094942-203744 rG 09 49 42.89 -20 37 44.5           ~ 5 1
70 CENSORS 62 rG 09 49 45.86 -21 50 06.5           ~ 5 0
71 NVSS J094949-213432 rG 09 49 49.04 -21 34 32.8           ~ 6 0
72 PMN J0949-2156b rG 09 49 53.697 -21 56 17.43           ~ 11 1
73 NVSS J094959-212719 rG 09 49 59.71 -21 27 18.3           ~ 4 0
74 MCG-04-24-001 GiG 09 50 27.682 -21 48 09.29   14.08   13.10 13.6 ~ 31 0
75 PMN J0950-2102 rG 09 50 31.33 -21 02 44.6           ~ 6 1
76 NVSS J095038-214115 rG 09 50 38.48 -21 41 15.1           ~ 5 0
77 CENSORS 56 Rad 09 50 43.23 -21 26 37.6           ~ 4 0
78 NVSS J095046-213251 Rad 09 50 46.78 -21 32 51.1           ~ 4 0
79 NVSS J095048-215455 Rad 09 50 48.32 -21 55 01.2           ~ 5 1
80 NVSS J095053-213301 Rad 09 50 53.40 -21 33 01.4           ~ 4 0
81 NVSS J095058-211418 Rad 09 50 58.91 -21 14 18.1           ~ 5 1
82 CENSORS 38 QSO 09 51 16.8972406608 -20 56 37.600675836           ~ 6 1
83 NVSS J095121-212954 Rad 09 51 21.17 -21 29 54.6           ~ 5 1
84 NVSS J095122-215152 Rad 09 51 21.90 -21 52 03.3           ~ 5 1
85 PMN J0951-2050 rG 09 51 29.151 -20 50 29.49           ~ 12 1
86 NVSS J095129-202540 Rad 09 51 29.20 -20 25 40.9           ~ 4 0
87 NVSS J095129-201641 rG 09 51 29.85 -20 16 43.2           ~ 6 1
88 NVSS J095132-210027 rG 09 51 32.39 -21 00 28.9           ~ 4 0
89 NVSS J095141-201117 rG 09 51 41.09 -20 11 16.0           ~ 5 1
90 PSO J147.9316-21.3996 Bla 09 51 43.6019146934 -21 23 58.619030572   18.40 18.65     ~ 15 1
91 NVSS J095148-203153 Rad 09 51 48.71 -20 31 53.4           ~ 4 0
92 NVSS J095148-213337 rG 09 51 48.92 -21 33 37.2           ~ 4 0
93 NVSS J095150-212514 rG 09 51 50.39 -21 25 14.4           ~ 4 0
94 NVSS J095201-202454 rG 09 52 01.26 -20 24 54.0         17.15 ~ 5 0
95 NVSS J095201-211550 Rad 09 52 01.39 -21 15 53.8           ~ 5 1
96 NVSS J095210-205008 Rad 09 52 10.86 -20 50 08.2           ~ 5 0
97 NVSS J095212-214027 Rad 09 52 12.69 -21 40 27.6           ~ 4 0
98 NVSS J095212-210236 Rad 09 52 12.81 -21 02 33.7           ~ 5 1
99 NVSS J095217-200835 Rad 09 52 17.61 -20 08 35.6           ~ 5 1
100 NVSS J095226-200105 rG 09 52 26.41 -20 01 07.1           ~ 6 0
101 NVSS J095242-195820 rG 09 52 43.02 -19 58 20.1           ~ 6 1
102 NVSS J095250-213147 Rad 09 52 50.42 -21 31 47.6           ~ 4 0
103 NVSS J095255-205207 QSO 09 52 55.86 -20 52 07.0           ~ 5 0
104 NVSS J095259-214841 rG 09 52 59.09 -21 48 41.0           ~ 6 1
105 NVSS J095304-204409 rG 09 53 04.49 -20 44 11.1           ~ 5 1
106 NVSS J095309-200122 rG 09 53 09.47 -20 01 17.9           ~ 6 1
107 NVSS J095320-214358 rG 09 53 20.59 -21 43 58.8           ~ 4 0
108 CENSORS 49 Sy1 09 53 23.2 -20 13 43   20.55 20.57     ~ 5 0
109 [VV2010] J095329.6-200213 QSO 09 53 29.51689 -20 02 13.1303           ~ 11 1
110 NVSS J095330-213558 Rad 09 53 30.34 -21 35 58.9           ~ 5 1
111 PMN J0953-2136 rG 09 53 44.260 -21 35 53.40           ~ 6 1
112 NVSS J095357-203652 rG 09 53 57.43 -20 36 51.1           ~ 5 0
113 NVSS J095403-202513 rG 09 54 03.05 -20 25 13.1           ~ 4 0
114 NVSS J095410-215800 rG 09 54 10.51 -21 58 01.5           ~ 4 0
115 NVSS J095416-212912 Rad 09 54 16.90 -21 29 12.4           ~ 5 1
116 2MASX J09542145-2148062 EmG 09 54 21.456 -21 48 06.21   16.22   15.18 16.92 ~ 8 0
117 CENSORS 44 QSO 09 54 27.0571625136 -20 29 46.606438248   20.80 20.48     ~ 5 0
118 CENSORS 48 QSO 09 54 28.2920402544 -20 39 26.794126656           ~ 6 1
119 NVSS J095428-215653 rG 09 54 29.469 -21 56 53.39           ~ 10 1
120 NVSS J095431-203540 Rad 09 54 31.12 -20 35 40.0           ~ 4 0
121 NVSS J095436-214437 Rad 09 54 36.25 -21 44 37.9           ~ 5 1
122 NVSS J095438-210425 rG 09 54 38.08 -21 04 28.0           ~ 9 1
123 NVSS J095441-204947 Rad 09 54 41.98 -20 49 47.1           ~ 5 0
124 NVSS J095447-205943 Rad 09 54 47.24 -20 59 48.4           ~ 5 1
125 NVSS J095451-213017 rG 09 54 51.97 -21 30 16.6           ~ 4 0
126 NVSS J095452-211928 rG 09 54 52.43 -21 19 28.8           ~ 5 1
127 NVSS J095453-211512 rG 09 54 53.20 -21 15 12.9           ~ 4 0
128 NVSS J095511-203020 Rad 09 55 11.87 -20 30 20.6         17.52 ~ 5 0
129 LEDA 828986 Sy2 09 55 13.5880518576 -21 23 02.831364996   17.30   15.90 14.88 ~ 16 0
130 NVSS J095523-213002 Rad 09 55 23.96 -21 30 02.9           ~ 4 0
131 NVSS J095527-204607 rG 09 55 26.95 -20 46 05.9           ~ 5 0
132 NVSS J095541-203939 Rad 09 55 41.88 -20 39 38.2           ~ 4 0
133 NVSS J095545-212527 Rad 09 55 45.86 -21 25 27.0         15.11 ~ 5 0
134 NVSS J095559-204253 Rad 09 55 59.27 -20 42 53.2           ~ 5 1
135 NVSS J095602-215602 Rad 09 56 02.35 -21 56 02.9           ~ 6 1
136 CENSORS 114 QSO 09 56 04.4 -21 44 37   23.68 23.62     ~ 5 0
137 NVSS J095607-200540 Rad 09 56 07.01 -20 05 40.6           ~ 4 0
138 NVSS J095628-204844 Rad 09 56 28.15 -20 48 44.5           ~ 5 1
139 NVSS J095629-200130 Rad 09 56 30.13 -20 01 34.0           ~ 6 1
140 NVSS J095637-201902 rG 09 56 37.01 -20 19 02.6         16.94 ~ 5 0
141 NVSS J095638-201044 Rad 09 56 38.86 -20 10 44.1           ~ 4 0
142 NVSS J095642-211941 Rad 09 56 42.22 -21 19 41.8           ~ 5 1
143 NVSS J095649-203523 rG 09 56 49.78 -20 35 25.8         17.09 ~ 5 0
144 NVSS J095702-215650 rG 09 57 02.06 -21 56 50.7           ~ 4 0
145 NVSS J095715-203034 Rad 09 57 15.62 -20 30 34.0           ~ 4 0
146 NVSS J095722-210103 Rad 09 57 22.22 -21 01 03.4           ~ 4 0
147 NVSS J095724-202236 rG 09 57 24.53 -20 22 36.3           ~ 6 0
148 NVSS J095726-201304 rG 09 57 26.12 -20 13 04.3           ~ 6 1
149 CENSORS 8 Rad 09 57 30.06 -21 30 58.9         17.77 ~ 5 0
150 NVSS J095730-213237 Rad 09 57 30.82 -21 32 37.7           ~ 5 0
151 NVSS J095731-212025 rG 09 57 31.82 -21 20 25.4           ~ 4 0
152 NVSS J095735-202931 QSO 09 57 35.04 -20 29 31.7           ~ 4 0
153 NVSS J095739-200318 Rad 09 57 39.46 -20 03 18.5           ~ 6 1
154 NVSS J095743-200636 rG 09 57 42.62 -20 06 44.4           ~ 6 1
155 NVSS J095746-212326 rG 09 57 46.06 -21 23 27.7         17.23 ~ 5 0
156 NVSS J095751-213321 rG 09 57 51.25 -21 33 25.4           ~ 12 1
157 EGGR 70 WD* 10 33 42.7629604320 -11 41 38.340637314 11.851 12.847 13.012 13.138 13.278 DA1.9 123 0
158 LP 551-59 PM* 11 05 10.3771084091 +07 06 49.639384795   20.2   18.0   M5V 20 0
159 EGGR 76 WD* 11 07 59.9504280373 -05 09 26.034289695 12.397 13.093 13.057 13.141 13.215 DA3 172 0
160 Cl* NGC 6205 KAD 185 * 16 40 41.29 +36 21 13.1   15.38 14.70     G8IV/V 31 0

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