2007ApJ...657..116K

Query : 2007ApJ...657..116K

2007ApJ...657..116K - Astrophys. J., 657, 116-134 (2007/March-1)

Evolution of the X-ray emission of radio-quiet quasars.

KELLY B.C., BECHTOLD J., SIEMIGINOWSKA A., ALDCROFT T. and SOBOLEWSKA M.

Abstract (from CDS):

We report new Chandra observations of seven optically faint, z∼4 radio-quiet quasars (RQQs). We have combined these new observations with previous Chandra observations of RQQs to create a sample of 174 sources. These sources have 0.1<z<4.7, and 1044 ergs/s<νLν(2500 Å)<1048 ergs/s. The X-ray detection fraction is 90%. We find that the X-ray loudness of RQQs decreases with UV luminosity and increases with redshift. The model that is best supported by the data has a linear dependence of optical to X-ray ratio αoxon cosmic time and a quadratic dependence of αox on logLUV, where αoxbecomes X-ray quiet more rapidly at higher logLUV. We find no significant evidence for a relationship between the X-ray photon index Γxand the UV luminosity, and we find marginally significant evidence that the X-ray continuum flattens with increasing z (2 σ). The Γx-z anticorrelation may be the result of X-ray spectral curvature, redshifting of a Compton reflection component into the observed Chandra band, and/or redshifting of a soft excess out of the observed Chandra band. Using the results for Γx, we show that the αox-z relationship is unlikely to be a spurious result caused by redshifting of the observable X-ray spectral region. A correlation between αoxand z implies evolution of the accretion process. We present a qualitative comparison of these new results with models for accretion disk emission.

Abstract Copyright: ∼

Journal keyword(s): Accretion, Accretion Disks - Galaxies: Quasars: General - Ultraviolet: Galaxies - X-Rays: Galaxies

VizieR on-line data: <Available at CDS (J/ApJ/657/116): table2.dat table4.dat>

Simbad objects: 174

goto Full paper

goto View the references in ADS

Number of rows : 174
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 QSO B2359+005 QSO 00 02 30.7160444376 +00 49 59.142934236   19.11 18.65     ~ 37 0
2 LBQS 0004-0032 QSO 00 06 54.1087846872 -00 15 33.401293884   18.75 18.51     ~ 58 0
3 2XMMi J002209.9+001629 Sy1 00 22 09.9564084144 +00 16 29.318525148   17.6 18.23 18.2   ~ 50 0
4 2SLAQ J002752.40+002615.6 Sy1 00 27 52.3978299696 +00 26 15.725679936   19.13 18.72     ~ 47 0
5 LBQS 0028+0017 QSO 00 31 31.4400237816 +00 34 20.213950944   19.12 18.94     ~ 58 0
6 QSO J0050-0053 QSO 00 50 06.3495668808 -00 53 19.234743900   22.45 21.20     ~ 42 0
7 [VV2006] J005701.2+145003 QSO 00 57 01.1293588032 +14 50 03.011650944   19.14 18.95     ~ 27 0
8 QSO J0059+0003 QSO 00 59 22.6502935968 +00 03 01.440525204   23.24 21.11     ~ 57 0
9 QSO B0103+00 QSO 01 06 19.2392271120 +00 48 23.369353992   21.68 20.23     ~ 94 0
10 [VV2006] J011305.6+153146 QSO 01 13 05.6613223848 +15 31 46.493286024   17.7 18.51 18.1   ~ 30 0
11 QSO J0113+1535 QSO 01 13 09.0622794480 +15 35 53.670489720   18.69 18.51     ~ 40 0
12 QSO B0113+000 QSO 01 15 37.7224170672 +00 20 28.681054872   19.56 19.19     ~ 38 0
13 QSO J0133+0400 QSO 01 33 40.3265690928 +04 00 59.844453768     18.30     ~ 74 0
14 QSO J0134+3307 QSO 01 34 21.4863198144 +33 07 56.378382420     18.80     ~ 37 0
15 [VV2006] J014812.2+000154 QSO 01 48 12.2356920816 +00 01 53.313272184   17.93 17.81     ~ 47 0
16 [VV2006] J014821.0-000225 QSO 01 48 20.9616991968 -00 02 25.771575480   18.0 18.60 17.8   ~ 37 0
17 2XMM J015258.6+010507 Sy1 01 52 58.6699733496 +01 05 07.412400708   19.67 19.46     ~ 36 0
18 QSO J0153+0052 QSO 01 53 09.1273392936 +00 52 50.124891468   19.63 19.28     ~ 41 0
19 [VV2006] J015650.3+005308 QSO 01 56 50.2824718320 +00 53 08.493345600   19.03 18.67     ~ 30 0
20 Mrk 1014 Sy1 01 59 50.2534701768 +00 23 40.864244784   16.08 15.87     ~ 606 0
21 [VV2006] J020118.7-091935 QSO 02 01 18.6772269168 -09 19 35.819261832   16.8 17.75 16.8   ~ 44 0
22 QSO B0206+0008 QSO 02 08 45.5408663088 +00 22 36.030753876   17.48 17.26     ~ 60 0
23 QSO J0209+0517 QSO 02 09 44.6218858992 +05 17 13.727761872     17.80     ~ 60 0
24 [VV2006] J023217.7-073120 QSO 02 32 17.6822097552 -07 31 19.926284484   20.06 19.59     ~ 30 0
25 [VV2006] J024105.8-081153 QSO 02 41 05.8408146912 -08 11 53.161848708   19.4 20.33 19.1   ~ 33 0
26 SDSS J024110.03+002301.3 QSO 02 41 10.0298437056 +00 23 01.400664516   20.54 20.37     ~ 29 0
27 QSO B0241-01 QSO 02 44 01.8451874040 -01 34 03.848758680     18.20     ~ 65 0
28 QSO J0248+1802 QSO 02 48 54.2720204400 +18 02 49.274967876     18.4     ~ 49 0
29 2SLAQ J025959.68+004813.6 QSO 02 59 59.6826127512 +00 48 13.609877724     19.65 18.9   ~ 40 0
30 QSO J0311-1722 QSO 03 11 15.2117927712 -17 22 47.669854188     17.73     ~ 37 0
31 2MASS J03142746-0111523 Sy1 03 14 27.4623857040 -01 11 52.323386712   18.10 17.98     ~ 36 0
32 QSO J0403-1703 QSO 04 03 56.6606313000 -17 03 21.923360028     18.7     ~ 35 0
33 QSO J0419-5716 QSO 04 19 50.9421498024 -57 16 12.986233104     17.78     ~ 21 0
34 2MASS J07550211+2203465 QSO 07 55 02.1188861064 +22 03 46.840154004   19.36 19.24     ~ 25 0
35 [VV2006] J075535.6+405802 QSO 07 55 35.6140025904 +40 58 02.991995220   19.28 19.06     ~ 37 0
36 [VV2006] J075540.0+411118 QSO 07 55 40.0086594000 +41 11 19.066886952   18.0 17.98 18.3   ~ 28 0
37 QSO J0755+4056 QSO 07 55 45.6071116488 +40 56 43.602318924   19.63 19.39     ~ 36 0
38 [VV2006] J081951.5+364951 Sy1 08 19 51.4255561944 +36 49 50.877749244   18.9 19.27 19.1   ~ 26 0
39 [VV2006] J083205.9+524358 QSO 08 32 05.9554919472 +52 43 59.198921364   19.91 19.70     ~ 28 0
40 [VV2006] J084526.6+343101 QSO 08 45 26.5607845320 +34 31 01.904859732   20.23 20.03     ~ 21 0
41 [VV2006] J084905.1+445715 QSO 08 49 05.0720835432 +44 57 14.726399724   20.79 20.38 19.540   ~ 44 0
42 US 1728 Sy1 08 49 43.7075568144 +45 00 24.223571172   19.02 18.69     ~ 49 0
43 [VV2006] J091029.0+542718 QSO 09 10 29.0305494480 +54 27 19.024472412   18.86 18.81 18.480   ~ 50 0
44 [VV2006] J091210.4+054742 QSO 09 12 10.3520703600 +05 47 42.136511712   18.96 18.51     ~ 41 0
45 QSO B0910+564 QSO 09 14 39.3579390480 +56 13 20.367548796   20.95 20.87     ~ 34 1
46 2MASS J09182859+5139321 Sy1 09 18 28.5874448448 +51 39 32.112199116   18.03 17.65     ~ 40 0
47 [VV2006] J091847.5+064705 QSO 09 18 47.5366255368 +06 47 04.680763440   17.9 19.15 18.7   ~ 29 0
48 [VV2006] J093359.4+551550 QSO 09 33 59.3431475520 +55 15 50.704610976   19.47 19.26     ~ 48 0
49 [VV98] J094133.7+594811 QSO 09 41 33.6886133016 +59 48 11.200552560   16.89 16.62     ~ 37 0
50 [VV2006] J095024.1+561946 QSO 09 50 24.0349736352 +56 19 46.751492604   20.89 20.74     ~ 28 0
51 [VV2006] J095130.2+594037 QSO 09 51 30.2319495600 +59 40 37.137042624   19.44 19.09     ~ 23 0
52 [VV2006] J095151.5+594430 QSO 09 51 51.5571634080 +59 44 30.094375668   19.90 19.83     ~ 32 0
53 [VV2006] J095240.2+515250 QSO 09 52 40.1759848392 +51 52 49.940342940   18.54 18.54     ~ 37 0
54 [VV2006] J095243.0+515121 QSO 09 52 43.0493664216 +51 51 21.052578528   18.17 17.97     ~ 31 0
55 [VV2006] J095505.7+593517 QSO 09 55 05.6379291936 +59 35 17.474207244   19.46 19.22     ~ 27 0
56 QSO J0955+5940 QSO 09 55 11.3292372432 +59 40 30.651561732   21.12 19.74     ~ 47 0
57 [VV2006] J095542.1+411654 QSO 09 55 42.1252454280 +41 16 55.317685476   20.68 20.07     ~ 43 0
58 [VV2006] J095548.1+410955 QSO 09 55 48.1400540496 +41 09 55.313520804   19.24 19.09     ~ 40 0
59 [VV2006] J095640.4+411043 QSO 09 56 40.3791277392 +41 10 43.485942252   21.04 20.87     ~ 29 0
60 [VV2006] J095820.5+073436 QSO 09 58 20.5035342600 +07 34 36.013590408   18.93 18.76     ~ 32 0
61 [VV2006] J095822.6+074747 QSO 09 58 22.6213333152 +07 47 47.709497148   20.83 20.53     ~ 29 0
62 [VV2006] J095836.6+074556 QSO 09 58 36.6028177248 +07 45 56.295919728   19.72 19.52     ~ 27 0
63 QSO B0958+559 QSO 10 02 05.3569751208 +55 42 57.917027808   18.76 18.38     ~ 53 0
64 QSO B1000+4751 QSO 10 03 52.8479755584 +47 36 53.404376652   20.08 19.86     ~ 30 0
65 2MASS J10131485-0052338 Sy1 10 13 14.8587569952 -00 52 33.636789840   18.12 17.86     ~ 40 0
66 QSO B1015+4752 QSO 10 19 02.0193382032 +47 37 14.579417460   19.76 19.46     ~ 36 0
67 [VV2006] J102351.0+041541 QSO 10 23 50.9414218824 +04 15 42.142755168   19.68 19.57     ~ 40 0
68 [VV2006] J103031.7+052455 QSO 10 30 31.6492057752 +05 24 54.948102624   18.30 18.00     ~ 38 0
69 [VV2006] J103227.9+573822 QSO 10 32 27.9358703448 +57 38 22.546696416   20.70 20.64 20.67   ~ 45 0
70 SDSS J103236.22+580034.0 QSO 10 32 36.2273258448 +58 00 34.002367848   20.21 19.99 19.83   ~ 31 0
71 QSO B1033-033 QSO 10 36 23.7457432848 -03 43 18.929156772     18.5     ~ 74 0
72 QSO B1035+4743 QSO 10 38 08.6754937704 +47 27 34.877250684   19.10 18.77     ~ 27 0
73 QSO B1039+0117 QSO 10 42 30.6628140696 +01 00 01.614966948   18.99 18.73     ~ 31 0
74 [VV2006] J104454.9+592134 QSO 10 44 54.9063927144 +59 21 34.148633904   19.81 19.49     ~ 31 0
75 [VV2006] J104921.5+575037 QSO 10 49 21.4960004064 +57 50 36.653735004   19.40 19.07     ~ 33 0
76 [VV2006] J105015.6+570255 QSO 10 50 15.5913537864 +57 02 55.717614456   20.86 20.46 20.09   ~ 34 0
77 [VV2006] J105050.1+573820 QSO 10 50 50.1349912512 +57 38 20.017503240   19.61 19.32     ~ 39 0
78 [VV98] J105239.6+572432 QSO 10 52 39.5958253296 +57 24 31.425574788   18.39 18.07     ~ 76 0
79 [VV98] J105316.9+573552 QSO 10 53 16.7644541304 +57 35 50.730680004   19.97 19.47     ~ 69 0
80 [VV2006] J105404.1+574019 QSO 10 54 04.1053976304 +57 40 19.726433436   18.49 18.24     ~ 47 0
81 [VV2006] J105422.6+572031 QSO 10 54 22.5549379248 +57 20 30.975206136   20.56 20.21     ~ 33 0
82 [VV2006] J105518.1+570423 QSO 10 55 18.0837617808 +57 04 23.564566452   19.06 18.90     ~ 31 0
83 2MASS J10564457+5722333 Sy1 10 56 44.5315516272 +57 22 33.318822864   19.58 19.13     ~ 17 0
84 QSO J1057+4555 QSO 10 57 56.2610108784 +45 55 53.070401748   20.19 18.80 17.2 16.8 ~ 118 0
85 [VV2006] J110905.3+090048 QSO 11 09 05.2889056704 +09 00 48.679558380   20.04 19.82     ~ 23 0
86 [VV2006] J111132.1+553240 QSO 11 11 32.1238394952 +55 32 40.156913472   18.92 18.67     ~ 26 0
87 [VV2006] J111452.8+531531 QSO 11 14 52.8451758624 +53 15 31.727150964   20.08 19.50     ~ 33 0
88 [VV2006] J111520.7+530921 QSO 11 15 20.7335142288 +53 09 22.110732360   18.43 18.26     ~ 31 0
89 [VV2006] J112943.9-013752 QSO 11 29 43.9082980200 -01 37 52.228309908   18.73 18.40     ~ 25 0
90 [VV2006] J112951.2-015038 QSO 11 29 51.2090635200 -01 50 37.311181404   20.39 20.32     ~ 28 0
91 [VV2006] J113621.2+015927 QSO 11 36 21.2449129920 +01 59 27.850783884   19.55 19.36     ~ 26 0
92 LBQS 1133+0214 QSO 11 36 31.8732075504 +01 58 01.047101232   18.34 18.07     ~ 38 0
93 2MASS J11363308+0207475 Sy1 11 36 33.0906922848 +02 07 47.639014284   18.90 18.31     ~ 28 1
94 LEDA 90159 Sy1 12 02 26.7665445864 -01 29 15.399814956   17.81 17.54 17.534   ~ 101 0
95 QSO J1204+0150 QSO 12 04 36.6317128464 +01 50 25.516993344   19.00 18.79     ~ 40 0
96 [VV2006] J120829.5+001642 QSO 12 08 29.5647730752 +00 16 42.715886952   19.41 19.12     ~ 31 0
97 2XMM J121342.9+025248 Sy1 12 13 42.9602513928 +02 52 48.923372244   19.53 19.39     ~ 35 0
98 2QZ J121415.1+005510 Sy1 12 14 15.1611021648 +00 55 11.551902564   18.70 18.65     ~ 34 0
99 [VV2006] J121540.5-003433 QSO 12 15 40.4989808976 -00 34 33.729225528   19.59 19.48     ~ 27 0
100 [VV2006] J121836.0+054628 QSO 12 18 36.0884516808 +05 46 28.167953916   19.48 19.15     ~ 35 0
101 2QZ J122004.3-002540 Sy1 12 20 04.3746430800 -00 25 38.997437844   19.35 19.09     ~ 34 0
102 [VV2006] J122307.6+103448 QSO 12 23 07.5234413832 +10 34 48.194118228   19.20 18.98     ~ 41 0
103 [VV2006] J122652.0-001200 QSO 12 26 52.0145319624 -00 11 59.567659512   18.52 18.14     ~ 29 0
104 [VV2006] J122818.1+441301 QSO 12 28 18.0302576856 +44 13 01.977762180   17.3 18.34 17.5   ~ 29 0
105 [VV2006] J122853.7+441153 QSO 12 28 53.7135188760 +44 11 52.835342748   19.45 19.15     ~ 30 0
106 [VV2006] J123005.8+030204 QSO 12 30 05.8556278752 +03 02 04.361150544   19.29 19.07     ~ 25 0
107 [VV2006] J123025.9+030535 QSO 12 30 25.8770674848 +03 05 35.506616748   20.14 19.76     ~ 24 0
108 [VV2006] J123027.4+030627 QSO 12 30 27.4048333632 +03 06 27.550705464   18.91 18.75     ~ 29 0
109 [VV2006] J123039.9+030857 QSO 12 30 39.8962715136 +03 08 57.379563276   19.77 19.62     ~ 25 0
110 SDSS J123054.71+030537.1 QSO 12 30 54.7158203592 +03 05 37.202453952   19.84 19.47     ~ 20 0
111 QSO B1234+6231 QSO 12 36 22.9397294472 +62 15 26.681258664 20.56 20.5002   20.5 20.5072 ~ 77 0
112 QSO B1235+6219 QSO 12 37 16.0012375248 +62 03 23.351091948 19.9 20.55 20.19 19.9 19.5 ~ 64 0
113 [VV2006] J124255.3+024957 QSO 12 42 55.3172310768 +02 49 56.935644492   19.64 19.39     ~ 35 0
114 LBQS 1243-0011 QSO 12 45 40.9941953712 -00 27 44.864241876   18.97 18.75     ~ 49 0
115 [VV2006] J125535.1+565239 QSO 12 55 35.1146166096 +56 52 39.535609188   19.59 19.44     ~ 41 0
116 [VV2006] J125536.3+564959 QSO 12 55 36.2328655968 +56 49 59.965898052   20.50 20.24     ~ 25 0
117 [VV2006] J125849.8-014303 QSO 12 58 49.8385384248 -01 43 03.322837956   17.73 17.38     ~ 38 0
118 2QZ J125943.5+010254 Sy1 12 59 43.5959834136 +01 02 55.085858520   18.71 18.47     ~ 32 0
119 2QZ J131108.4+003151 Sy1 13 11 08.4809919456 +00 31 51.771187812   18.14 17.98     ~ 44 0
120 QSO J1317+3531 QSO 13 17 43.1304151704 +35 31 31.964624292   22.58 20.95     ~ 43 0
121 QSO J1321+0038 QSO 13 21 10.8210785904 +00 38 21.621816744   24.05 22.60     ~ 42 0
122 [VV2006] J134425.9-000056 QSO 13 44 25.9507317600 -00 00 56.187446472   18.98 18.73     ~ 41 0
123 [VV2006] J141104.1+521756 QSO 14 11 04.1391817344 +52 17 55.449031452   19.49 19.28     ~ 35 0
124 [VV2006] J141104.8+520517 QSO 14 11 04.8699019728 +52 05 16.798061688   19.58 19.25     ~ 36 0
125 QSO J1413+0000 QSO 14 13 15.3675271440 +00 00 32.338894212   21.89 20.68     ~ 46 0
126 LEDA 51016 Sy1 14 17 00.8224797456 +44 56 06.336360024   16.93 16.63     ~ 275 0
127 [VV2000] J141951.9+470902 QSO 14 19 51.8475971880 +47 09 01.292548428   18.16 17.83     ~ 45 0
128 [VV2006] J142414.1+421400 QSO 14 24 14.0878795224 +42 14 00.037624308   19.56 19.37     ~ 8 0
129 HS 1422+4224 QSO 14 24 35.9762180040 +42 10 30.471656088   17.99 17.82     ~ 54 0
130 LBQS 1430-0046 QSO 14 32 44.4416657448 -00 59 15.086271948   17.81 17.49     ~ 56 1
131 [VV2006] J143335.3+022718 QSO 14 33 35.3326927272 +02 27 18.254391012   20.32 20.10     ~ 26 0
132 [VV2006] J143407.4+022704 QSO 14 34 07.4756251440 +02 27 04.622699988   19.80 19.58     ~ 32 0
133 QSO J1438+0341 QSO 14 38 41.9569096512 +03 41 10.398731316   18.81 18.51 17.82   ~ 42 0
134 [VV2006] J143859.0+033547 QSO 14 38 59.0558134680 +03 35 47.451663420   18.4 18.62 18.2   ~ 29 0
135 [VV2006] J144231.7+011055 QSO 14 42 31.7221836498 +01 10 55.413109732   23.45 22.04     ~ 38 0
136 [VV2006] J144340.7+585653 QSO 14 43 40.7011811832 +58 56 53.241710964   20.45 19.22     ~ 38 0
137 QSO J1444-0123 QSO 14 44 28.6293273096 -01 23 44.061469764   21.73 20.55     ~ 41 0
138 [VV2006] J144554.8+012903 QSO 14 45 54.7590223920 +01 29 03.289600824   20.24 20.13     ~ 37 0
139 QSO B1447+4750 QSO 14 48 53.4209398320 +47 38 21.233150232   19.99 19.67     ~ 33 0
140 LBQS 1446+0027 QSO 14 48 56.7103649304 +00 15 10.285740612   19.08 18.89     ~ 37 0
141 2QZ J144913.5+002406 Sy1 14 49 13.5050189496 +00 24 06.902791560   19.49 19.19     ~ 30 0
142 2MASS J14521558+4304485 Sy1 14 52 15.5926657872 +43 04 48.704604060   19.65 19.13 17.910   ~ 29 0
143 7C 145049.60+432031.00 QSO 14 52 40.9134673080 +43 08 14.373346776   19.71 19.63     ~ 30 2
144 [VV98] J145300.6+335206 QSO 14 53 00.6255321840 +33 52 07.663469196   23.34 21.91     ~ 12 0
145 [VV2006] J151126.5+565934 QSO 15 11 26.4595050936 +56 59 34.806647472   17.92 17.70     ~ 32 0
146 [VV2006] J151504.8+552107 QSO 15 15 04.8922490784 +55 21 07.292753856   20.75 20.63     ~ 24 0
147 2MASS J15394761+4313408 QSO 15 39 47.6231103840 +43 13 41.615886684   19.14 18.90     ~ 21 0
148 3XMM J154316.3+540526 Sy1 15 43 16.4247899016 +54 05 26.078942076   18.51 18.18     ~ 34 0
149 PG 1543+489 Sy1 15 45 30.2358624864 +48 46 08.976390420   16.92 16.73     ~ 247 0
150 [VV2006] J160517.8-010955 QSO 16 05 17.7624198840 -01 09 55.472049756   19.78 19.40     ~ 22 0
151 [VV2006] J161834.0+345625 QSO 16 18 34.0080765384 +34 56 25.512339048   19.53 19.07     ~ 39 0
152 [VV2006] J164025.0+464448 QSO 16 40 25.0344632304 +46 44 49.132337424   18.64 18.51     ~ 36 0
153 [VV2006] J164110.5+464911 QSO 16 41 10.5503589720 +46 49 11.839916964   18.8 19.33 19.1   ~ 29 0
154 QSO B1640+401 QSO 16 41 54.2342964648 +40 00 33.127945128   17.6 18.05 17.2   ~ 51 0
155 [VV2006] J165713.3+352439 QSO 16 57 13.2500696808 +35 24 39.335083848   19.64 19.50     ~ 40 0
156 HS 1700+6416 QSO 17 01 00.6194059368 +64 12 09.118892376   16.39 16.17     ~ 382 0
157 [VV2006] J170224.5+340538 QSO 17 02 24.5230378104 +34 05 39.142128516   19.43 19.15     ~ 32 0
158 2E 3824 Sy1 17 03 55.7918446920 +60 45 11.766054168   19.47 19.02     ~ 32 0
159 [VV2006] J170817.9+615448 QSO 17 08 17.8613389008 +61 54 48.599863308   18.55 18.15     ~ 32 0
160 [VV2006] J171927.3+273246 QSO 17 19 27.2532379104 +27 32 46.847891256   19.44 19.01     ~ 22 0
161 [VV2006] J172026.5+263816 QSO 17 20 26.4774774864 +26 38 16.053646344   19.56 19.30     ~ 35 0
162 [VV2006] J173551.9+535516 QSO 17 35 51.9230348376 +53 55 15.643190352   17.8 18.20 18.0   ~ 29 0
163 [VV2006] J173716.6+582839 QSO 17 37 16.5322850184 +58 28 39.493124004   19.35 19.20     ~ 29 0
164 [VV2006] J173836.2+583748 QSO 17 38 36.1562135304 +58 37 48.514573164   18.53 18.08     ~ 27 0
165 QSO J2215-1611 QSO 22 15 27.2920172928 -16 11 33.057278052     18.10     ~ 58 0
166 QSO J2238-0921 QSO 22 38 19.7656691904 -09 21 06.110018208   19.18 18.65     ~ 38 0
167 SDSS J223854.68-093736.2 QSO 22 38 54.6814610400 -09 37 36.217713756   19.93 19.50     ~ 22 0
168 SDSS J223917.30-093340.9 QSO 22 39 17.3019609600 -09 33 40.920822324   19.67 19.45     ~ 25 0
169 SDSS J224903.28-080841.7 QSO 22 49 03.2870480040 -08 08 41.703650088   19.71 19.54     ~ 23 0
170 [VV2006] J233718.0+002551 QSO 23 37 18.0762868680 +00 25 50.658997188   19.68 19.40     ~ 35 0
171 [VV2006] J233722.0+002239 QSO 23 37 22.0223586912 +00 22 38.904489192   19.80 19.43     ~ 38 0
172 [VV2006] J233739.1+002656 QSO 23 37 39.1272394368 +00 26 56.190627996   19.25 19.06     ~ 41 0
173 PB 5542 QSO 23 48 40.0548681240 +01 07 53.495969556   18.64 18.46 18.390   ~ 37 0
174 [VV2006] J235718.4+004350 QSO 23 57 18.3619645248 +00 43 50.431495872   23.01 21.43     ~ 47 0

To bookmark this query, right click on this link: simbad:objects in 2007ApJ...657..116K and select 'bookmark this link' or equivalent in the popup menu