2007ApJ...667..673G

Query : 2007ApJ...667..673G

2007ApJ...667..673G - Astrophys. J., 667, 673-703 (2007/October-1)

The FIRST-2MASS Red Quasar Survey.

GLIKMAN E., HELFAND D.J., WHITE R.L., BECKER R.H., GREGG M.D. and LACY M.

Abstract (from CDS):

Combining radio observations with optical and infrared color selection, demonstrated in our pilot study to be an efficient selection algorithm for finding red quasars, we have obtained optical and infrared spectroscopy for 120 objects in a complete sample of 156 candidates from a sky area of 2716 deg2. Consistent with our initial results, we find that our selection criteria (J-K>1.7, R-K>4.0) yield a ∼50% success rate for discovering quasars substantially redder than those found in optical surveys. Comparison with UVX- and optical color-selected samples shows that ≳10% of the quasars are missed in a magnitude-limited survey. Simultaneous two-frequency radio observations for part of the sample indicate that a synchrotron continuum component is ruled out as a significant contributor to reddening the quasars' spectra. We go on to estimate extinctions for our objects assuming that their red colors are caused by dust. Continuum fits and Balmer decrements suggest E(B-V) values ranging from near zero to 2.5 mag. Correcting the K-band magnitudes for these extinctions, we find that for K≤14.0, red quasars make up between 25% and 60% of the underlying quasar population; owing to the incompleteness of 2MASS at fainter K-band magnitudes, we can only set a lower limit to the radio-detected red quasar population of >20%-30%.

Abstract Copyright: ∼

Journal keyword(s): ISM: Dust, Extinction - Galaxies: Quasars: General - Surveys

VizieR on-line data: <Available at CDS (J/ApJ/667/673): table1.dat table2.dat obscode.dat>

Nomenclature: Tables 1, 2: F2M JHHMMSS.ss+DDMMSS.s N=137 added.

Simbad objects: 159

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Number of rows : 159
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2024 		#notes
1 2MASS J00234792-0145424 G 00 23 47.9451851256 -01 45 42.369752772   21.44   19.71   ~ 2 0
2 FIRST J003659.8-011332 QSO 00 36 59.8312535184 -01 13 32.518899516   21.63 20.76 20.023 18.630 ~ 10 0
3 2MASS J00440277-1054186 G 00 44 02.77 -10 54 18.6   22.34   19.10   ~ 4 0
4 3C 22.0 Sy1 00 50 56.3 +51 12 03   22.0       ~ 150 0
5 NAME SMC G 00 52 38.0 -72 48 01   2.79 2.2     ~ 11146 1
6 2MASS J01171276-0127558 G 01 17 12.77 -01 27 55.8   22.50   20.80   ~ 3 0
7 QSO B0132-097 QSO 01 34 35.6657627616 -09 31 02.903742300   24.52 22.70 20.80   ~ 110 1
8 2MASS J01585993-0128022 Q? 01 58 59.9288824368 -01 28 01.808469912   21.95   19.51   ~ 2 0
9 4C -02.09 QSO 02 15 42.01728739 -02 22 56.7526546   21.8 21.8 19.71   ~ 75 1
10 2MASS J02295065-0842353 QSO 02 29 50.6390619528 -08 42 35.367006636   20.28   19.18   ~ 3 0
11 7C 022927.30+341049.00 QSO 02 32 28.8769824336 +34 23 46.713498468   20.70 19     ~ 194 1
12 2MASS J02475925-0834085 Q? 02 47 59.2961522976 -08 34 08.961680856   20.33   19.10   ~ 2 0
13 F2M J070110.72+523012.0 G 07 01 10.72 +52 30 12.0   21.4   19.3   ~ 1 0
14 2MASS J07242399+2626446 G 07 24 24.00 +26 26 44.7   21.27   20.80   ~ 2 0
15 2MASS J07291035+3336344 QSO 07 29 10.3407294624 +33 36 34.341085188   22.12   20.16   ~ 9 0
16 2MASS J07305104+2538593 AGN 07 30 51.0529633776 +25 38 59.251765056   20.83 19.99 19.20   ~ 4 0
17 2MASS J07333960+4525211 G 07 33 39.60 +45 25 21.1   22.50   19.09   ~ 3 0
18 2MASS J07380606+2141031 AGN 07 38 06.06 +21 41 03.1   22.50   20.80   ~ 4 0
19 QSO J0738+2750 QSO 07 38 20.0980570896 +27 50 45.297215268   23.21 21.82 20.80   ~ 30 0
20 2MASS J07384974+3156114 Sy2 07 38 49.747 +31 56 11.48   21.66 20.54 19.19   ~ 15 0
21 2MASS J07534112+2506391 QSO 07 53 41.121 +25 06 39.20   21.62   19.42   ~ 3 0
22 F2M J075527.61+244644.5 Q? 07 55 27.61 +24 46 44.5   20.3   19.4   ~ 1 0
23 2MASS J08102971+1603096 G 08 10 29.7118236024 +16 03 08.995713624   21.55   19.15   ~ 2 0
24 7C 080735.29+414300.00 Bla 08 10 58.99422809 +41 34 02.8068333   18.84 18.75 18.44   ~ 64 1
25 2MASS J08170549+1958428 G 08 17 05.4948 +19 58 42.931   19.88   19.07   ~ 10 1
26 2MASS J08173959+4354199 Sy1 08 17 39.5809057368 +43 54 20.230011648   21.29 20.29 18.66   ~ 9 0
27 7C 081451.89+423206.00 BLL 08 18 15.99961476 +42 22 45.4148987   18.88 18.18 17.81   ~ 400 1
28 2MASS J08183093+1305277 AGN 08 18 30.936 +13 05 27.73   21.80   19.27   ~ 3 0
29 2MASS J08202593+4728026 Q? 08 20 25.934 +47 28 02.61   21.09   19.36   ~ 2 0
30 4C 22.21 BLL 08 23 24.7592164368 +22 23 03.287299236   20.22 19.57 19.7   ~ 180 1
31 QSO J0825+4716 QSO 08 25 02.059 +47 16 51.99   21.19 20.77 20.45   ~ 14 0
32 2MASS J08301113+3759517 QSO 08 30 11.1448924152 +37 59 51.748147140   20.07   18.80   ~ 12 0
33 QSO J0834+3506 QSO 08 34 06.9392869320 +35 06 02.825208216   21.41 20.56 18.96   ~ 24 0
34 QSO J0841+3604 QSO 08 41 04.981 +36 04 50.34   22.05 21.29 20.80   ~ 13 0
35 2MASS J08433233+4921161 QSO 08 43 32.3097926640 +49 21 16.443550656   20.34   19.50   ~ 7 0
36 FIRST J084622.2+182250 Q? 08 46 22.289 +18 22 50.01           ~ 1 0
37 F2M J084938.56+143910.8 G 08 49 38.56 +14 39 10.8   20.7   19.4   ~ 1 0
38 F2M J090355.86+202019.0 Q? 09 03 55.86 +20 20 19.0       19.5   ~ 1 0
39 2MASS J09045051-0145247 QSO 09 04 50.5230872856 -01 45 24.767995356   21.26   20.36   ~ 6 0
40 7C 090323.89+500501.00 QSO 09 06 51.50598467 +49 52 35.9494236   21.63 21.31 20.80   ~ 22 1
41 2MASS J09130378+1942344 G 09 13 03.788 +19 42 34.46   22.50   19.96   ~ 2 0
42 2MASS J09150172+2418121 Sy1 09 15 01.7199333984 +24 18 12.092683104   20.69 20.38 20.80   ~ 29 0
43 2MASS J09150954+1819239 G 09 15 09.540 +18 19 23.91   20.89   19.42   ~ 2 0
44 2MASS J09154373+2850350 AGN 09 15 43.732 +28 50 35.07   20.38   19.35   ~ 3 0
45 2MASS J09160852-0319390 QSO 09 16 08.5208887608 -03 19 39.067300560   21.54   19.54   ~ 6 0
46 4C 38.28 QSO 09 16 48.90457434 +38 54 28.1463634   19.92 19.38 18.77   ~ 143 1
47 2MASS J09192061+1531520 G 09 19 20.615 +15 31 52.03   20.81   18.87   ~ 2 0
48 2MASS J09194668+2258228 Q? 09 19 46.683 +22 58 22.80   22.0   20.2   ~ 2 0
49 2MASS J09212216+3029104 G 09 21 22.163 +30 29 10.40   21.59   19.029   ~ 4 0
50 [VV2006] J092145.7+191812 QSO 09 21 45.7126491576 +19 18 16.142183856   22.63 22.17 20.12   ~ 9 0
51 F2M J092204.17+132153.5 Q? 09 22 04.17 +13 21 53.5   20.5   18.7   ~ 1 0
52 2MASS J09235708+1538301 Q? 09 23 57.086 +15 38 30.15   22.50   19.20   ~ 2 0
53 FIRST J092422.3+322355 Q? 09 24 22.34 +32 23 55.1   21.6   19.5   ~ 1 0
54 2MASS J09274442+3930378 QSO 09 27 44.4325602648 +39 30 37.772749368   20.74   18.70   ~ 8 0
55 87GB 093518.5+180941 Q? 09 38 05.71355190 +17 55 50.3999713   20.1   18.8   ~ 9 0
56 9C J0940+2603 BLL 09 40 14.72278286 +26 03 29.9461593   20.32 19.62 19.21   ~ 48 1
57 2MASS J09432045+3654444 BiC 09 43 20.458 +36 54 44.50   21.69   20.06   ~ 4 0
58 2MASS J09445193+3113526 G 09 44 51.94 +31 13 52.7   22.50   19.65   ~ 2 0
59 2MASS J09445413+4156587 Q? 09 44 54.136 +41 56 58.79   19.1       ~ 2 0
60 F2M J094642.55+184034.0 AGN 09 46 42.6 +18 40 32   22.50   20.80   ~ 3 0
61 2MASS J09494735+2325229 AGN 09 49 47.359 +23 25 22.94   21.18   19.27   ~ 3 0
62 2MASS J09503246+1852232 G 09 50 32.47 +18 52 23.2   22.50   19.64   ~ 3 0
63 F2M J095213.18+250059.0 Q? 09 52 13.18 +25 00 59.0   21.1   18.9   ~ 1 0
64 2MASS J09585362+1238231 Q? 09 58 53.63 +12 38 23.1   20.74   19.34   ~ 4 0
65 F2M J100006.47+454950.0 Q? 10 00 06.47 +45 49 50.0           ~ 1 0
66 2MASS J10012535+4445598 G 10 01 25.357 +44 45 59.88   22.21   19.28   ~ 2 0
67 2MASS J10041177+2943281 AGN 10 04 11.774 +29 43 28.11   21.94   20.80   ~ 3 0
68 QSO J1004+1229 QSO 10 04 24.8871 +12 29 22.245   24.83 23.23 20.80   ~ 52 1
69 2MASS J10105715+3000215 G 10 10 57.154 +30 00 21.53   22.50   19.40   ~ 2 0
70 QSO J1012+2825 QSO 10 12 30.507 +28 25 27.52   22.78 21.85 20.80   ~ 11 0
71 FIRST J101348.2+172039 Q? 10 13 48.294 +17 20 39.08   20.7   19.8   ~ 1 0
72 F2M J101431.77-022053.4 Q? 10 14 31.77 -02 20 53.4   21.1   19.2   ~ 1 0
73 2MASS J10152856+1207517 Sy2 10 15 28.56 +12 07 51.8   22.15 22.15 19.56   ~ 5 0
74 2MASS J10181316+1903039 G 10 18 13.1638086984 +19 03 04.164940260   20.70   19.95   ~ 4 1
75 2XMM J101829.7+213530 Sy1 10 18 29.7274206600 +21 35 29.900831712   20.37 19.49 18.33   ~ 9 0
76 2MASS J10205403+1627032 Q? 10 20 54.033 +16 27 03.28   22.12   19.43   ~ 2 0
77 2MASS J10222934+1929385 Sy2 10 22 29.3646998448 +19 29 39.094591056   21.92 20.61 19.20   ~ 11 0
78 2MASS J10225744+1628405 AGN 10 22 57.4518854736 +16 28 40.527547644   21.19   20.42   ~ 3 0
79 2MASS J10363355+2828212 QSO 10 36 33.5487248160 +28 28 21.111011256   21.70 21.05 20.01   ~ 18 0
80 F2M J103819.65+221847.4 Q? 10 38 19.65 +22 18 47.4   19.0   19.6   ~ 1 0
81 2MASS J10433571+1928213 G 10 43 35.711 +19 28 21.31   21.94   19.62   ~ 2 0
82 2MASS J10435532+2157182 G 10 43 55.321 +21 57 18.30   21.32   19.65   ~ 2 0
83 F2M J104642.55+160417.4 QSO 10 46 42.5871592488 +16 04 16.871483604   22.2   19.9   ~ 3 0
84 2MASS J10490298+4010315 AGN 10 49 02.985 +40 10 31.56   24.07 22.86 19.66   ~ 4 0
85 2MASS J10491824+1544586 G 10 49 18.240 +15 44 58.66   22.50   20.80   ~ 4 0
86 ICRF J110607.2+281247 Sy1 11 06 07.26174303 +28 12 47.0650016   19.20 18.75 20.02   ~ 83 0
87 FIRST J110622.4+202135 Q? 11 06 22.477 +20 21 35.58   21.6   19.7   ~ 1 0
88 2MASS J11135466+1244390 Sy1 11 13 54.6593262552 +12 44 39.060865860   21.59 20.74 19.00   ~ 33 0
89 FIRST J111725.0+315530 BiC 11 17 25.027 +31 55 30.94   21.5   19.2   ~ 7 0
90 4C -02.46 BLL 11 17 33.8466607296 -02 36 00.428337720   20.27   18.75   ~ 18 1
91 QSO J1118-0033 QSO 11 18 11.044 -00 33 40.91   21.63 20.89 19.87   ~ 10 0
92 F2M J113919.45+455531.0 Q? 11 39 19.377 +45 55 31.08   20.6   19.0   ~ 2 0
93 2MASS J11392617+2743564 AGN 11 39 26.176 +27 43 56.42   20.61 19.85 19.12   ~ 4 0
94 2MASS J11403230+2401171 QSO 11 40 32.2865225736 +24 01 17.912042580   21.2   19.3   ~ 3 0
95 ICRF J114207.7+154754 BLL 11 42 07.7378 +15 47 54.202   20.1   19.5   ~ 58 1
96 ICRF J114658.2+395834 Sy1 11 46 58.29791724 +39 58 34.3043988   18.80 18.45 18.58   ~ 230 1
97 QSO J1151+5359 QSO 11 51 24.1006822824 +53 59 57.195191512   21.43 21.04 20.80   ~ 11 0
98 2MASS J11534443+2905237 Q? 11 53 44.433 +29 05 23.77   21.68   19.25   ~ 2 0
99 Ton 599 Sy1 11 59 31.83391383 +29 14 43.8268224   14.80 14.41 17.652 13.39 ~ 925 1
100 2MASS J12011113-0332196 G 12 01 11.1400644432 -03 32 19.564668600   22.50   19.40   ~ 5 0
101 2MASS J12025534+2615189 Sy2 12 02 55.34 +26 15 19.0   20.69 20.69 19.34   ~ 7 0
102 2MASS J12061841+2857199 G 12 06 18.416 +28 57 19.91   20.76   19.30   ~ 2 0
103 FIRST J120827.7+170814 G 12 08 27.758 +17 08 14.07   22.11   19.40   ~ 2 0
104 2MASS J12092107-0107168 QSO 12 09 21.0894344160 -01 07 17.001623100   20.07 19.22 17.86   ~ 7 0
105 2MASS J12251136+2757272 Q? 12 25 11.3517477312 +27 57 27.073665036   21.38   19.59   ~ 2 0
106 [VV2006] J122703.2+505356 QSO 12 27 03.1962516984 +50 53 56.208944256   20.02 19.27 18.77   ~ 27 0
107 FIRST J122924.8+250921 Q? 12 29 24.80 +25 09 21.0   22.50   20.21   ~ 2 0
108 F2M J124023.71+435318.4 Q? 12 40 23.71 +43 53 18.4   20.4   19.0   ~ 1 0
109 2MASS J13030321+2433558 BLL 13 03 03.2171262048 +24 33 55.735965792   20.09 19.54 18.2   ~ 72 0
110 2MASS J13040409+4612537 QSO 13 04 04.0992255002 +46 12 53.473274704   19.86   18.32   ~ 3 0
111 2MASS J13070066+2338050 QSO 13 07 00.6300561336 +23 38 05.144506728   20.81 19.92 19.37   ~ 25 0
112 2MASS J13211523+4105157 G 13 21 15.2321202024 +41 05 15.687303972   20.59   18.94   ~ 3 0
113 [VV2006] J134108.1+330110 QSO 13 41 08.1099993672 +33 01 10.348643496   22.80 21.68 20.80   ~ 17 1
114 2MASS J13440831+2839320 QSO 13 44 08.3248264560 +28 39 32.046512076   22.33 21.31 20.80   ~ 9 0
115 [VV2006] J135308.7+365752 QSO 13 53 08.648 +36 57 51.39   22.50   20.80   ~ 9 0
116 2MASS J13573211+3245300 Q? 13 57 32.114 +32 45 30.05   21.73   19.36   ~ 2 0
117 [VV2006] J135941.2+315740 QSO 13 59 41.17 +31 57 41.2   21.63   19.56   ~ 7 0
118 2MASS J14081161+3243506 QSO 14 08 11.616 +32 43 50.64   22.50   19.59   ~ 3 0
119 2MASS J14121426+2912084 QSO 14 12 14.2996682376 +29 12 08.253527976   20.87   19.42   ~ 4 0
120 2MASS J14152285+3333063 QSO 14 15 22.8479116272 +33 33 06.493910328   20.84 19.89 18.92   ~ 4 0
121 FIRST J142112.8+360850 Q? 14 21 12.88 +36 08 50.9   20.1       ~ 1 0
122 2MASS J14224617+2404113 * 14 22 46.18 +24 04 11.4   22.50   20.80   M 3 0
123 QSO B1423+146 QSO 14 25 49.01801221 +14 24 56.9018642   18.35 17.96 19.54   ~ 51 1
124 2MASS J14274439+3723367 QSO 14 27 44.3348136408 +37 23 37.069753632   21.50   19.59   ~ 5 0
125 2MASS J14343494+2937055 Q? 14 34 34.943 +29 37 05.52   21.78   19.39   ~ 2 0
126 2SLAQ J144659.90-005015.1 Q? 14 46 59.878 -00 50 15.13   21.52 20.64 18.94   ~ 6 0
127 2MASS J14481215+3056138 G 14 48 12.16 +30 56 13.8   22.02   19.39   ~ 3 0
128 2MASS J14540667+1950279 QSO 14 54 06.6868503864 +19 50 28.138887348   20.74   18.89   ~ 6 0
129 7C 1456+3554 Q? 14 58 43.4098195728 +35 42 57.654297468   20.63   18.96   ~ 6 1
130 ICRF J145844.7+372021 BLL 14 58 44.7945139728 +37 20 21.622681212   20.30 19.81 19.43   ~ 87 1
131 2MASS J15315047+2423178 QSO 15 31 50.4620222616 +24 23 17.732350032   20.52   19.17   ~ 14 0
132 2XMM J153233.2+241526 QSO 15 32 33.177 +24 15 25.79   20.6   20.1   ~ 9 0
133 2MASS J15451687+3815395 Sy1 15 45 16.8788469312 +38 15 39.543226416   20.0   18.2   ~ 5 0
134 2MASS J15493872+1245092 QSO 15 49 38.7147322320 +12 45 09.161026308   19.21 18.54 17.61   ~ 38 0
135 FIRST J155523.7+341939 Q? 15 55 23.72 +34 19 39.1   20.8   19.2   ~ 1 0
136 2MASS J16003457+3522267 QSO 16 00 34.5818006352 +35 22 26.808060576   20.52   18.59   ~ 4 0
137 F2M J160743.42+143037.6 Q? 16 07 43.42 +14 30 37.6   21.4   19.6   ~ 1 0
138 2MASS J16125363+3320099 Q? 16 12 53.636 +33 20 09.97   21.08   19.39   ~ 2 0
139 F2M J161454.10+351413.2 Q? 16 14 54.10 +35 14 13.1   22.1   19.3   ~ 1 0
140 2MASS J16180974+3502089 QSO 16 18 09.7463560944 +35 02 08.823870956   20.20   18.25   ~ 11 0
141 NAME Her B Sy1 16 42 58.80997043 +39 48 36.9939552   16.81 16.59 16.84   ~ 1725 2
142 2MASS J16540768+3435270 AGN 16 54 07.6779832272 +34 35 27.150424512   20.0   18.3   ~ 2 0
143 QSO J1656+3821 QSO 16 56 47.128 +38 21 36.70   23.70 22.68 20.80   ~ 13 0
144 2MASS J17042532+3037088 QSO 17 04 25.3188884976 +30 37 09.046443684   20.52   20.80   ~ 3 0
145 2MASS J17080253+2227240 QSO 17 08 02.5315316976 +22 27 24.284447460   22.56 21.44 19.35   ~ 6 0
146 2MASS J17105840+3109583 Q? 17 10 58.3990444536 +31 09 58.432512240   16.32   19.34   ~ 2 0
147 7C 172226.89+400715.00 BLL 17 24 05.42881867 +40 04 36.4570720   21.90   19.75   ~ 96 1
148 2MASS J17242802+3331201 QSO 17 24 28.0205801016 +33 31 20.092537560           ~ 3 0
149 FIRST J173353.1+412455 Q? 17 33 53.18 +41 24 55.5   21.0   19.0   ~ 1 0
150 SDSS J221633.72-005451.7 QSO 22 16 33.7271117688 -00 54 51.645302964   19.92   17.91   ~ 6 0
151 2MASS J22225279-0202576 QSO 22 22 52.7852416056 -02 02 57.315965928   21.37   20.04   ~ 5 0
152 2MASS J22243841-0007498 G 22 24 38.413 -00 07 49.83   22.50   19.78   ~ 5 0
153 ICRF J224730.1+000006 BLL 22 47 30.19599756 +00 00 06.4623909   20.01 19.27 18.17   ~ 82 1
154 2MASS J23110462-0214580 G 23 11 04.626 -02 14 58.07   22.05   19.51   ~ 2 0
155 2MASS J23254988-1052441 QSO 23 25 49.8862601208 -10 52 43.891375872   20.98 20.13 19.70   ~ 7 0
156 6dFGS gJ232821.7-110703 Sy2 23 28 21.7486530792 -11 07 02.972551332   19.84   18.36   ~ 10 0
157 2MASS J23390381-0912211 Sy1 23 39 03.8253377688 -09 12 21.261644928   21.50 20.31 18.6   ~ 30 0
158 2MASS J23455489-1003293 G 23 45 54.900 -10 03 29.31   21.18   18.48   ~ 3 0
159 2MASS J23504009-1043597 G 23 50 40.097 -10 43 59.79   21.27   19.24   ~ 3 0

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