2012ApJ...755...89R

Query : 2012ApJ...755...89R

2012ApJ...755...89R - Astrophys. J., 755, 89 (2012/August-3)

Metallicity evolution of damped Lyα systems out to z ∼ 5.

RAFELSKI M., WOLFE A.M., PROCHASKA J.X., NEELEMAN M. and MENDEZ A.J.

Abstract (from CDS):

We present chemical abundance measurements for 47 damped Lyα (DLA) systems, 30 at z > 4, observed with the Echellette Spectrograph and Imager and the High Resolution Echelle Spectrometer on the Keck telescopes. H I column densities of the DLAs are measured with Voigt profile fits to the Lyα profiles, and we find an increased number of false DLA identifications with Sloan Digital Sky Survey at z > 4 due to the increased density of the Lyα forest. Ionic column densities are determined using the apparent optical depth method, and we combine our new metallicity measurements with 195 from previous surveys to determine the evolution of the cosmic metallicity of neutral gas. We find the metallicity of DLAs decreases with increasing redshift, improving the significance of the trend and extending it to higher redshifts, with a linear fit of -0.22±0.03 dex per unit redshift from z to z ∼ 5, despite our sensitivity for finding DLAs with much lower metallicities. However, this floor is not statistically different from a steep tail to the distribution. We also find that the intrinsic scatter of metallicity among DLAs of ∼0.5 dex continues out to z ∼ 5. In addition, the metallicity distribution and the α/Fe ratios of z > 2 DLAs are consistent with being drawn from the same parent population with those of halo stars. It is therefore possible that the halo stars in the Milky Way formed out of gas that commonly exhibits DLA absorption at z > 2.

Abstract Copyright: ∼

Journal keyword(s): Galaxy: halo - galaxies: abundances - galaxies: evolution - galaxies: general - galaxies: ISM - quasars: absorption lines

VizieR on-line data: <Available at CDS (J/ApJ/755/89): table1.dat table2.dat table3.dat table4.dat refs.dat>

Simbad objects: 216

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Number of rows : 216
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 LBQS 2359-0216B QSO 00 01 49.9509602856 -01 59 39.455306448   18 18.0     ~ 112 0
2 QSO J0003-2603 QSO 00 03 22.9531962024 -26 03 18.304471908   18 17.53     ~ 293 0
3 QSO J0007+2417 QSO 00 07 38.6226394608 +24 17 24.835551000     18.69     ~ 14 0
4 LBQS 0010-0012 QSO 00 13 06.1519752552 +00 04 31.948605732   19.29 19.05     ~ 102 0
5 QSO J0013+1358 QSO 00 13 28.2075196056 +13 58 28.013967228   20.65 19.76     ~ 36 0
6 LBQS 0013-0029 QSO 00 16 02.4050159808 -00 12 25.077257064   18.67 18.36     ~ 198 0
7 QSO B0019-1522 QSO 00 22 08.0390087400 -15 05 39.983288316     19.0     ~ 59 0
8 QSO J0040-0915 BLL 00 40 54.6575670840 -09 15 26.833615164   26.46 22.40     ~ 59 0
9 QSO B0039-3354 QSO 00 42 16.4579582040 -33 37 54.839369172   18.34 17.74     ~ 15 0
10 LBQS 0049-2820 QSO 00 51 27.1928384280 -28 04 33.966262488     18.1     ~ 45 0
11 QSO B0058-292 QSO 01 01 04.6496114136 -28 58 01.682742576     18.7     ~ 46 0
12 PHL 957 QSO 01 03 11.2741573824 +13 16 17.809871484   16.97 16.57     ~ 350 0
13 QSO J0105-1846 QSO 01 05 16.7912097864 -18 46 41.986634736     18.3     ~ 80 0
14 QSO B0112+03 QSO 01 14 53.2286036664 +03 14 56.953353696     18.6     ~ 62 2
15 QSO B0112-30 QSO 01 15 04.8742901280 -30 25 14.952952308           ~ 50 1
16 QSO J0127-0045 QSO 01 27 00.6906783576 -00 45 59.149137528   19.95 18.95     ~ 56 0
17 QSO J0133+0400 QSO 01 33 40.3265690928 +04 00 59.844453768     18.30     ~ 74 0
18 QSO J0134+3307 QSO 01 34 21.4863198144 +33 07 56.378382420     18.80     ~ 37 0
19 QSO J0137-2707 QSO 01 37 54.5560896408 -27 07 36.616431864   18.6       ~ 24 0
20 QSO J0139-0824 QSO 01 39 01.4050523400 -08 24 44.045742600   19.05 18.80     ~ 52 0
21 6C 014940+333547 QSO 01 52 34.5766588080 +33 50 33.159720264   18.5 18.5     ~ 134 1
22 QSO B0201+113 Bla 02 03 46.65705710 +11 34 45.4094619   19.5 19.5 19.41   ~ 216 1
23 7C 020156.39+363507.00 QSO 02 04 55.5959081688 +36 49 17.992097868     18.1     ~ 127 1
24 QSO J0209+0517 QSO 02 09 44.6218858992 +05 17 13.727761872     17.80     ~ 60 0
25 QSO J0210-0018 QSO 02 10 43.1633481288 -00 18 18.444357900   23.49 21.97     ~ 69 0
26 QSO B0216+0803 QSO 02 18 57.3582544488 +08 17 27.346030260     18.1     ~ 94 0
27 QSO J0235+1615 QSO 02 35 56.8839609768 +16 15 24.345385776           ~ 10 1
28 HE 0242-2917 QSO 02 42 00.0 -29 17 00           ~ 6 0
29 QSO J0255+0048 QSO 02 55 18.5784341184 +00 48 47.540744316   21.15 20.00     ~ 84 0
30 QSO B0253+0058 QSO 02 56 07.2504632664 +01 10 38.606304864   19.58 19.11     ~ 69 0
31 QSO B0254-404 QSO 02 56 34.0345534368 -40 13 00.403326228     17.4     ~ 34 0
32 QSO B0300-3152 QSO 03 02 11.3270286552 -31 40 30.385641576   17.7       ~ 17 0
33 QSO J0304-2211 QSO 03 04 49.8652311288 -22 11 51.882127548   16.43 16.40     ~ 111 0
34 QSO J0307-4945 QSO 03 07 22.8949808808 -49 45 48.274545240     18.76     ~ 69 0
35 QSO J0331-0741 QSO 03 31 19.6631898672 -07 41 43.170430344   25.87 22.92     ~ 41 0
36 QSO B0335-122 Bla 03 37 55.4513467728 -12 04 04.551994488   21.018 20.110 20.199   ~ 88 1
37 QSO B0336-017 Bla 03 39 00.98616588 -01 33 17.6076051   20.1 19.1 18.8   ~ 121 2
38 QSO B0347-383 QSO 03 49 43.6603590912 -38 10 30.825444900     17.3     ~ 196 0
39 QSO J0407-4410 QSO 04 07 18.0880236912 -44 10 13.983623724   17.6 17.6     ~ 103 1
40 QSO B0421-2624 QSO 04 23 53.9629367304 -26 18 01.098294768     18.1     ~ 17 0
41 QSO B0424-2209 QSO 04 26 10.3253549256 -22 02 17.793957984     17.94     ~ 37 0
42 QSO B0425-5214 QSO 04 26 44.5187583816 -52 08 19.796703972   17.8 17.8     ~ 15 0
43 QSO B0432-440 Bla 04 34 03.2139497184 -43 55 47.757093672   19.8 19.60 19.7   ~ 43 1
44 QSO B0438-43 Bla 04 40 17.17997576 -43 33 08.6043290   19.31 19.5 18.2   ~ 302 2
45 QSO B0449-1645 QSO 04 52 14.2529886192 -16 40 16.386415284   18.0 17.0 17.8   ~ 48 1
46 QSO J0453-1305 QSO 04 53 13.5744238944 -13 05 55.085318988   13.2 16.5     ~ 94 2
47 QSO B0454+0356 Bla 04 56 47.1747907776 +04 00 52.946102484   16.76 16.53 16.26   ~ 247 1
48 4C -02.19 Bla 05 01 12.80988538 -01 59 14.2564557   19.1 18.06 19.04   ~ 624 1
49 QSO B0528-2505 Bla 05 30 07.9627395840 -25 03 29.900044512   18.17 17.34 17.7   ~ 429 1
50 QSO B0551-36 QSO 05 52 46.1824785360 -36 37 27.608212524   17.72 17.57     ~ 98 0
51 QSO B0642-5038 QSO 06 43 27.0080170248 -50 41 12.811001244     18.5     ~ 47 0
52 6C 073759+311929 Bla 07 41 10.70330407 +31 12 00.2291151   17.02 16.89 16.322   ~ 468 1
53 QSO J0745+4734 QSO 07 45 21.7878198936 +47 34 36.191801820   16.76 16.44     ~ 103 0
54 QSO J0747+2739 QSO 07 47 11.1466907592 +27 39 03.365989812     17.20     ~ 74 0
55 QSO J0747+4434 QSO 07 47 49.7379630144 +44 34 17.086179108   22.88 21.15     ~ 58 0
56 SDSS J075907.58+180054.7 QSO 07 59 07.5819618072 +18 00 54.766391148   26.34 23.48     ~ 30 0
57 QSO B0805+5224 QSO 08 08 49.4238903240 +52 15 15.242663556   21.79 20.40     ~ 58 0
58 QSO J0812+32 QSO 08 12 40.6859242632 +32 08 08.579336496   18.16 17.75     ~ 106 0
59 QSO J0813+3508 QSO 08 13 33.3272185776 +35 08 10.787201808   24.72 22.54     ~ 48 1
60 3C 196 Sy1 08 13 36.0561170112 +48 13 02.644966020   18.36 17.79     ~ 578 2
61 QSO J0814+5029 QSO 08 14 35.1945299352 +50 29 46.365896904   20.04 19.07     ~ 50 0
62 QSO J0817+1351 QSO 08 17 40.5276736104 +13 51 34.564098852           ~ 34 0
63 QSO J0825+5127 QSO 08 25 35.1937162776 +51 27 06.374726748   19.77 18.92     ~ 49 0
64 QSO J0825+3544 QSO 08 25 40.1247290304 +35 44 14.244803304   20.56 19.39     ~ 36 0
65 QSO J0826+3148 QSO 08 26 19.7049044064 +31 48 48.019135932   18.29 17.99     ~ 49 0
66 7C 082754.29+242103.00 Bla 08 30 52.08619250 +24 10 59.8202919   17.62 17.26 16.30   ~ 563 1
67 [VV2006] J083122.6+404623 QSO 08 31 22.5760969488 +40 46 23.417454036   24.03 21.99     ~ 37 0
68 QSO J0834+2140 QSO 08 34 29.4445334088 +21 40 24.676327776   23.27 21.83     ~ 35 0
69 [VV2006] J083920.6+352459 QSO 08 39 20.5358988240 +35 24 59.388807132   24.11 22.39     ~ 35 0
70 QSO B0836+1122 QSO 08 39 32.9958412872 +11 12 06.594966828     18.8     ~ 93 0
71 QSO B0841+129 BLL 08 44 24.2445546984 +12 45 46.526286780   18.28 18.5     ~ 121 0
72 QSO B0900+42 QSO 09 00 33.5091652824 +42 15 47.031009948   17.63 17.18     ~ 85 0
73 [VV2006] J090940.7+330347 QSO 09 09 40.6676257560 +33 03 47.652068484   20.29 19.46     ~ 38 0
74 QSO B0913+003 BLL 09 15 51.69513598 +00 07 13.3089688   21.7 21.70 19.5   ~ 45 1
75 QSO J0929+2825 QSO 09 29 14.4966601344 +28 25 29.140690656   18.94 18.25     ~ 43 0
76 9C J0933+2845 QSO 09 33 37.2819249600 +28 45 32.315668668   19.63 17.94 17.50   ~ 83 1
77 QSO B0933-333 BLL 09 35 09.2297465736 -33 32 37.715739216   19.7 20.00 18.9   ~ 40 1
78 QSO B0933+733 QSO 09 37 48.8931145824 +73 01 58.080158076     17.3     ~ 60 0
79 US 796 QSO 09 38 57.0175740480 +41 28 21.216772452   16.94 16.75     ~ 144 1
80 US 987 QSO 09 48 35.9613489240 +43 23 02.600924892   18.54 18.37     ~ 57 0
81 QSO B0951-0450 QSO 09 53 55.7485789920 -05 04 18.968856168     19.0     ~ 61 0
82 QSO B0952+179 QSO 09 54 56.82361677 +17 43 31.2221518   17.31 17.23     ~ 222 1
83 QSO B0952-0115 QSO 09 55 00.1037541106 -01 30 06.549307797     18.7     ~ 150 0
84 QSO B0953+47 QSO 09 56 25.1645972520 +47 34 42.468198132     19.47     ~ 66 1
85 QSO B0957+33 QSO 09 57 44.4641685312 +33 08 20.768397468   20.70 19.42     ~ 66 0
86 [VV2006] J100416.1+434739 QSO 10 04 16.1285833632 +43 47 39.079029408   24.66 22.67     ~ 31 0
87 QSO J1007+0042 QSO 10 07 15.5351196552 +00 42 58.354186932   19.33 19.11     ~ 34 0
88 6C 100542+363832 QSO 10 08 41.2336002792 +36 23 19.347154440   18.55 18.17     ~ 53 1
89 QSO J1009+0713 QSO 10 09 02.0682581400 +07 13 43.900917312   17.41 17.27     ~ 72 1
90 2QZ J101018.2+000350 QSO 10 10 18.1897291872 +00 03 51.281497008   18.80 18.54     ~ 49 0
91 [VV2006] J101336.3+424026 QSO 10 13 36.3342625008 +42 40 26.500156140   25.37 23.09     ~ 34 0
92 QSO B1011+4315 QSO 10 14 47.1891688176 +43 00 30.167514324   17.39 17.05     ~ 74 0
93 QSO B1013+0035 QSO 10 15 49.0046761680 +00 20 20.010036984   22.25 20.79     ~ 72 0
94 6C 101357+613120 Bla 10 17 25.88756462 +61 16 27.4965040   18.74 18.44 17.87   ~ 101 1
95 QSO J1021+3001 QSO 10 21 56.5562383920 +30 01 40.456636248     17.48     ~ 56 0
96 QSO J1035+5440 QSO 10 35 14.2201778880 +54 40 40.215568800   18.77 18.45     ~ 37 0
97 QSO B1036-2257 QSO 10 39 09.5068714968 -23 13 26.396602392   18.0 18.0     ~ 46 0
98 SDSS J104242.40+310713.2 QSO 10 42 42.4106725080 +31 07 13.140059556   23.55 21.89     ~ 27 0
99 QSO J1051+3107 QSO 10 51 22.4674763160 +31 07 49.420074540           ~ 29 0
100 QSO J1051+3545 QSO 10 51 23.0335815072 +35 45 34.298215236   25.68 22.77     ~ 46 0
101 QSO J1057+4555 QSO 10 57 56.2610108784 +45 55 53.070401748   20.19 18.80 17.2 16.8 ~ 118 0
102 QSO B1055-301 Bla 10 58 00.42743188 -30 24 55.0274126   19.4 19.5 19.33   ~ 48 1
103 QSO J1100+1122 QSO 11 00 45.2300513352 +11 22 39.148223880   23.42 22.09     ~ 39 0
104 QSO J1101+0531 QSO 11 01 34.3595432208 +05 31 33.915664740   25.48 22.93     ~ 42 0
105 QSO B1104-181 QSO 11 06 33.3845199936 -18 21 23.829049296   15.8 15.9 15.7   ~ 338 1
106 QSO J1107+0048 QSO 11 07 29.0354645832 +00 48 11.289550860   17.89 17.54     ~ 59 0
107 QSO B1108-07 QSO 11 11 13.600 -08 04 02.00     18.10     ~ 85 0
108 SDSS J111126.65+350921.4 QSO 11 11 26.6482363632 +35 09 21.484104480   22.18 21.06     ~ 29 0
109 QSO B1113+4134A QSO 11 16 11.7332268768 +41 18 21.543299640   19.05 18.65     ~ 47 1
110 QSO B1117-1329 QSO 11 20 10.3163354592 -13 46 25.946998500     18.00     ~ 59 0
111 QSO B1122-168 QSO 11 24 42.8658917592 -17 05 17.389038732   16.5 16.5 16.1   ~ 132 1
112 QSO J1131+6044 QSO 11 31 30.4190850480 +60 44 20.760045180   18.45 18.08     ~ 46 0
113 QSO B1132+2243 QSO 11 35 08.0964488976 +22 27 15.600908232   17.7       ~ 52 0
114 QSO J1137+3907 QSO 11 37 09.5044356960 +39 07 23.411978616   18.34 17.99     ~ 45 0
115 QSO J1146+4037 QSO 11 46 57.7910518704 +40 37 08.602166820   24.80 22.78     ~ 60 0
116 2MASS J11552633+3510525 QSO 11 55 26.3481926736 +35 10 52.747187700   18.98 18.61     ~ 31 0
117 QSO B1157+014 QSO 11 59 44.8278142392 +01 12 06.985999764   17.87 17.52     ~ 228 1
118 QSO B1158+465 QSO 12 00 36.7346890920 +46 18 50.324566608   24.07 22.42     ~ 64 0
119 QSO J1200+4015 QSO 12 00 39.8150742264 +40 15 56.156311692   19.48 18.93     ~ 41 0
120 QSO J1201+2117 QSO 12 01 10.3124544696 +21 17 58.588803744   23.93 22.04     ~ 37 0
121 QSO J1202+3235 QSO 12 02 07.7828841960 +32 35 38.772889728   26.50 23.29     ~ 50 0
122 QSO J1204-0021 QSO 12 04 41.7296276952 -00 21 49.533353712   25.41 22.94     ~ 82 0
123 QSO B1202-074 QSO 12 05 23.1360370080 -07 42 32.759842896     17.5     ~ 389 5
124 [VV2006] J120802.6+630329 QSO 12 08 02.6643022584 +63 03 28.783413432   17.96 17.73     ~ 36 0
125 QSO B1209+0919 QSO 12 11 34.9526605296 +09 02 20.852132964   19.61 19.15     ~ 107 0
126 LBQS 1210+1731 QSO 12 13 03.0135468360 +17 14 23.237180160   18.21 18.03     ~ 91 0
127 QSO J1217+3305 Bla 12 17 32.5421411376 +33 05 38.030803980     17.5 17.7   ~ 122 1
128 [VV2006] J122042.0+444218 QSO 12 20 42.0025086528 +44 42 18.288586080   24.10 22.39     ~ 26 0
129 QSO J1224+0037 QSO 12 24 14.3016914568 +00 37 09.061204656   19.09 18.91     ~ 38 0
130 QSO J1225+0035 QSO 12 25 56.6186938080 +00 35 35.174880960   19.41 19.06     ~ 43 1
131 LBQS 1223+1753 QSO 12 26 07.1946195816 +17 36 49.921603812   18.93 18.59     ~ 115 0
132 QSO B1228-113 Bla 12 30 55.5556807872 -11 39 09.791771256   22.010   19.115   ~ 81 1
133 QSO B1230-1008 Bla 12 33 13.16488603 -10 25 18.4373962   19.7 19.80 19.1   ~ 54 1
134 LBQS 1232+0815 QSO 12 34 37.5514444464 +07 58 43.367750796     18.4     ~ 128 0
135 2MASS J12384093+3437035 QSO 12 38 40.9355211312 +34 37 03.405802296   19.05 18.84     ~ 35 0
136 QSO J1240+1455 QSO 12 40 20.9116339536 +14 55 35.634530316   20.15 19.57     ~ 49 0
137 [VV98] J124138.3+461717 QSO 12 41 38.3445927000 +46 17 17.086681140   19.13 18.95     ~ 34 0
138 QSO J1248+3110 QSO 12 48 20.2099865544 +31 10 43.304516364   22.27 21.06     ~ 41 0
139 QSO J1253-0228 QSO 12 53 36.3528737088 -02 28 07.744660284     18.80     ~ 42 0
140 QSO J1253+1046 QSO 12 53 53.3451523872 +10 46 03.133845768   24.63 22.71     ~ 29 0
141 QSO J1257-0111 QSO 12 57 59.2191767280 -01 11 30.304749804   20.90 19.82     ~ 43 0
142 [VV2006] J130215.7+550553 QSO 13 02 15.7228771800 +55 05 53.480734080   22.37 20.94     ~ 32 0
143 QSO J1304+1202 QSO 13 04 26.1527243616 +12 02 45.594735432   18.76 18.46     ~ 45 0
144 SDSS J131234.08+230716.3 QSO 13 12 34.0835956416 +23 07 16.261638816   25.02 22.71     ~ 19 0
145 LBQS 1320-0006 QSO 13 23 23.7871066608 -00 21 55.244828772   18.70 18.22     ~ 88 0
146 3C 286 Sy1 13 31 08.2883506368 +30 30 32.960091564   17.51 17.25     ~ 4558 2
147 QSO B1331+170 Bla 13 33 35.7827544072 +16 49 04.013500728   16.84 16.71 16.41   ~ 469 1
148 QSO B1337+11 QSO 13 40 02.5419344664 +11 06 30.181521168     18.7     ~ 120 0
149 QSO B1346-033 QSO 13 49 16.6595971512 -03 37 15.649009140   21.23 19.91     ~ 40 0
150 QSO J1353+5328 QSO 13 53 17.1121243056 +53 28 25.522388616   18.66 18.37     ~ 43 0
151 QSO J1356-1101 Bla 13 56 46.8321231864 -11 01 29.227444572   19.0 19.20 17.7   ~ 54 1
152 QSO B1354-174 Bla 13 57 06.07420758 -17 44 01.9049954   19 19 18   ~ 93 1
153 7C 1354+2552 QSO 13 57 06.5354509152 +25 37 24.494694024   19.13 18.93     ~ 101 1
154 QSO J1410+5111 QSO 14 10 30.6149316336 +51 11 13.644749184   19.28 18.82     ~ 39 0
155 SDSS J141209.96+062406.8 QSO 14 12 09.9691953864 +06 24 06.868135080   22.56 21.35     ~ 43 1
156 QSO B1409+0930 QSO 14 12 17.2929417480 +09 16 24.707943048     18.6     ~ 65 0
157 QSO J1419+5923 QSO 14 19 06.3130746264 +59 23 12.312356640   18.19 18.00     ~ 49 0
158 QSO B1418-064 Bla 14 21 07.75560722 -06 43 56.3557864   20.4 18.50 19.1   ~ 78 1
159 QSO B1425+606 QSO 14 26 56.1849081360 +60 25 50.813373324   16.82 16.54     ~ 148 0
160 QSO J1432+3940 QSO 14 32 24.7687190352 +39 40 24.541195152   23.01 21.19     ~ 46 0
161 QSO J1438+4314 QSO 14 38 35.9520037080 +43 14 59.236782756   22.03 20.39     ~ 46 0
162 QSO J1443+2724 QSO 14 43 31.1697928632 +27 24 36.768781008     19.3     ~ 94 0
163 [VV2006] J144617.4-010130 QSO 14 46 17.3554825536 -01 01 31.149859872   21.65 20.48     ~ 37 0
164 QSO B1451+123 QSO 14 54 18.5811696336 +12 10 53.897535696     18.6     ~ 88 0
165 QSO J1501+0019 QSO 15 01 23.4543047160 +00 19 40.036329804   18.28 18.12     ~ 46 0
166 QSO J1502+4837 QSO 15 02 26.8997425752 +48 37 11.336800512   19.58 19.28 18.24   ~ 47 1
167 QSO J1506+5220 QSO 15 06 54.5506795824 +52 20 04.744002588   21.72 20.14     ~ 57 0
168 [VV2006] J150726.3+440649 QSO 15 07 26.3201969040 +44 06 49.241849328   18.73 18.35     ~ 35 0
169 SDSS J151320.89+105807.3 QSO 15 13 20.9002218240 +10 58 07.366239048           ~ 22 0
170 QSO J1535+2943 QSO 15 35 53.8007550912 +29 43 13.680850512   22.17 20.48     ~ 39 0
171 QSO J1541+3153 QSO 15 41 53.4694925040 +31 53 29.397182856   18.21 17.93     ~ 45 0
172 QSO J1607+1604 QSO 16 07 34.2221892672 +16 04 17.439735180   24.78 22.53     ~ 26 0
173 4C 23.43 Bla 16 24 39.0838297968 +23 45 12.223370412   17.91 17.47     ~ 343 1
174 QSO J1626+2751 QSO 16 26 26.5027122120 +27 51 32.474301588   25.41 23.37     ~ 50 0
175 QSO J1654+2227 QSO 16 54 36.8596056120 +22 27 33.751477476   22.43 21.11     ~ 41 0
176 SDSS J165902.12+270935.1 QSO 16 59 02.1168040992 +27 09 35.099848296   26.06 23.37     ~ 36 0
177 QSO J1715+3809 QSO 17 15 39.4554152376 +38 09 09.936798876     18.56     ~ 19 1
178 QSO J1723+2243 QSO 17 23 23.1074068680 +22 43 57.140264100     18.17     ~ 42 0
179 QSO J1727+5302 QSO 17 27 39.0275674728 +53 02 29.280756336   18.72 18.42     ~ 55 0
180 QSO J1733+5533 QSO 17 33 23.0009461896 +55 33 00.840609108   18.36 18.12     ~ 38 0
181 QSO J1737+5828 QSO 17 37 44.8816610544 +58 28 29.588650716   25.47 22.95     ~ 52 0
182 NAME Galactic Center reg 17 45 39.60213 -29 00 22.0000           ~ 16269 0
183 QSO B1759+7539 BLL 17 57 46.3590423768 +75 39 16.181909928     16.50     ~ 90 0
184 QSO J1802+5616 QSO 18 02 48.8363975640 +56 16 50.442963780     18.30     ~ 25 0
185 QSO J2036-0553 QSO 20 36 42.2919965400 -05 53 00.276303984   19.01 18.80     ~ 43 0
186 [VV2006] J214129.4+111957 QSO 21 41 29.3875953048 +11 19 58.283450184   19.36 19.06     ~ 26 0
187 LBQS 2138-4427 QSO 21 41 59.5007724552 -44 13 25.930211268   19.17 18.20     ~ 70 1
188 QSO J2151-0707 QSO 21 51 17.0008138464 -07 07 53.357903148   19.43 19.21     ~ 30 0
189 QSO J2155+1358 QSO 21 55 02.0017063296 +13 58 25.712205816     18.00     ~ 50 0
190 LBQS 2206-1958A QSO 22 08 52.0729138920 -19 43 59.866776948   17.49 17.33     ~ 223 0
191 QSO B2223+20 QSO 22 25 36.9183374016 +20 40 15.316288356     18.60     ~ 29 1
192 QSO B2222-396 QSO 22 25 40.4396409888 -39 24 36.652870116     17.9     ~ 31 0
193 QSO B2228-399 QSO 22 31 35.3063849208 -39 38 54.315382236     18.3     ~ 23 0
194 LBQS 2230+0232 QSO 22 32 35.2154152488 +02 47 55.814764596   18.387 18.038     ~ 98 0
195 LBQS 2230-0015 QSO 22 34 08.9971751592 +00 00 01.703853180   18.09 17.39 17.3   ~ 142 0
196 SDSS J223438.52+005730.0 QSO 22 34 38.5279266888 +00 57 30.016587060   20.30 19.88 19.2   ~ 33 0
197 QSO J2238+0016 Sy1 22 38 43.5714295944 +00 16 47.949283164   20.65 19.74     ~ 44 0
198 QSO B2237-0607 QSO 22 39 53.6812264896 -05 52 19.996061772     18.3     ~ 120 0
199 QSO J2241+1352 QSO 22 41 47.7573429024 +13 52 02.741146356   22.20 20.66     ~ 52 0
200 QSO J2246-6015 QSO 22 47 08.9258659440 -60 15 45.299400480           ~ 74 0
201 SDSS J225246.43+142525.8 QSO 22 52 46.4418440712 +14 25 25.860136512   25.41 23.01     ~ 30 0
202 QSO J2315+1456 QSO 23 15 43.5656821392 +14 56 06.400539564   19.58 18.97     ~ 43 0
203 QSO J2315+0921 QSO 23 15 59.1311325480 +09 21 43.180860096     19.10     ~ 15 0
204 QSO B2314-409 Bla 23 16 46.91990359 -40 41 21.0863175   17.9 17.9     ~ 76 1
205 QSO J2323+2758 QSO 23 23 40.9006391448 +27 58 01.198261056     18.51     ~ 18 0
206 QSO J2328+0022 QSO 23 28 20.3832928800 +00 22 38.176896792   18.39 18.06     ~ 69 0
207 QSO B2332-094 QSO 23 34 46.4045250120 -09 08 12.250650732   19.21 18.62 18.07   ~ 89 1
208 QSO J2340-0053 QSO 23 40 23.6700032496 -00 53 27.001299696   18.26 17.93     ~ 109 1
209 QSO J2343+1410 QSO 23 43 52.6291457496 +14 10 14.595664728   18.92 18.62     ~ 38 0
210 QSO J2344+0342 QSO 23 44 03.1101598920 +03 42 26.725817304     18.20     ~ 51 0
211 QSO B2342+3417 QSO 23 44 51.2526572424 +34 33 48.696770052     19.1     ~ 67 1
212 QSO B2343+125 QSO 23 46 28.200 +12 49 00.00     17.5     ~ 143 2
213 QSO B2344+125 QSO 23 46 32.80 +12 45 40.0     17.0     ~ 88 1
214 QSO B2348-0108 QSO 23 50 57.8771296800 -00 52 09.886281492   19.23 18.77 18.7   ~ 152 0
215 QSO B2348-147 BLL 23 51 29.8153792680 -14 27 56.840819544     16.9     ~ 81 1
216 LBQS 2350-0045B QSO 23 53 21.6243455328 -00 28 40.657166148   17.5 18.13 17.9   ~ 60 0

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