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 - 2026 		#notes
1 2MASS J00234792-0145424 rG 00 23 47.9451851256 -01 45 42.369752772   21.44   19.71   ~ 2 0
2 IRAS F00344-0130 Sy1 00 36 59.8312535184 -01 13 32.518899516   21.63 20.76 20.023 18.630 ~ 15 0
3 NVSS J004402-105418 rG 00 44 02.77 -10 54 18.6   22.34   19.10   ~ 4 1
4 3C 22.0 Sy1 00 50 56.21976 +51 12 03.3552   22.0       ~ 153 1
5 NAME SMC G 00 52 38.0 -72 48 01   2.79 2.2     ~ 12317 1
6 NVSS J011712-012759 rG 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   ~ 113 2
8 2MASS J01585993-0128022 Q? 01 58 59.9288824368 -01 28 01.808469912   21.95   19.51   ~ 2 0
9 4C -02.09 Bla 02 15 42.01728739 -02 22 56.7526546   21.8 21.8 19.71   ~ 79 1
10 2MASS J02295065-0842353 Sy1 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     ~ 197 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 FIRST J072423.9+262644 rG 07 24 24.00 +26 26 44.7   21.27   20.80   ~ 2 0
15 2MASS J07291035+3336344 Sy1 07 29 10.3407294624 +33 36 34.341085188   22.12   20.16   ~ 13 0
16 2MASS J07305104+2538593 rG 07 30 51.0529633776 +25 38 59.251765056   20.83 19.99 19.20   ~ 4 0
17 NVSS J073339+452512 rG 07 33 39.60 +45 25 21.1   22.50   19.09   ~ 3 0
18 2MASS J07380606+2141031 Sy2 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 7C 073538.00+320242.00 Sy2 07 38 49.74744 +31 56 11.4792   21.66 20.54 19.19   ~ 17 1
21 2MASS J07534112+2506391 Sy1 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 rG 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   ~ 71 1
25 NVSS J081705+195842 rG 08 17 05.4948 +19 58 42.931   19.88   19.07   ~ 12 1
26 2MASS J08173959+4354199 Sy2 08 17 39.5809057368 +43 54 20.230011648   21.29 20.29 18.66   ~ 11 0
27 7C 081451.89+423206.00 BLL 08 18 15.99961476 +42 22 45.4148987   18.88 18.18 17.81   ~ 429 1
28 2MASS J08183093+1305277 Sy2 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   ~ 186 1
31 2MASS J08250205+4716519 Sy1 08 25 02.059 +47 16 51.99   21.19 20.77 20.45   ~ 17 0
32 2MASS J08301113+3759517 Sy1 08 30 11.1448924152 +37 59 51.748147140   20.07   18.80   ~ 16 0
33 2MASS J08340693+3506028 Sy1 08 34 06.9392869320 +35 06 02.825208216   21.41 20.56 18.96   ~ 27 0
34 2MASS J08410498+3604503 Sy1 08 41 04.981 +36 04 50.34   22.05 21.29 20.80   ~ 16 0
35 2MASS J08433233+4921161 Sy1 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   ~ 26 1
41 NVSS J091303+194232 rG 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   ~ 33 0
43 2MASS J09150954+1819239 rG 09 15 09.540 +18 19 23.91   20.89   19.42   ~ 2 0
44 2MASS J09154373+2850350 Sy2 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 1
46 4C 38.28 Bla 09 16 48.90457434 +38 54 28.1463634   19.92 19.38 18.77   ~ 159 1
47 2MASS J09192061+1531520 rG 09 19 20.615 +15 31 52.03   20.81   18.87   ~ 2 0
48 2MASS J09194668+2258228 Q? 09 19 46.68288 +22 58 22.8000   22.0   20.2   ~ 2 0
49 FIRST J092122.1+302909 rG 09 21 22.163 +30 29 10.40   21.59   19.029   ~ 5 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 NVSS J092422+322352 rG 09 24 22.31064 +32 23 54.8268   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   ~ 12 1
56 9C J0940+2603 BLL 09 40 14.72278286 +26 03 29.9461593   20.32 19.62 19.21   ~ 53 1
57 FIRST J094320.5+365445 rG 09 43 20.458 +36 54 44.50   21.69   20.06   ~ 4 0
58 FIRST J094451.9+311352 rG 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 Sy2 09 46 42.546 +18 40 33.96   22.50   20.80   ~ 3 0
61 2MASS J09494735+2325229 Sy2 09 49 47.359 +23 25 22.94   21.18   19.27   ~ 3 0
62 FIRST J095032.4+185222 rG 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 NVSS J100124+444558 rG 10 01 25.357 +44 45 59.88   22.21   19.28   ~ 2 0
67 2MASS J10041177+2943281 Sy2 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   ~ 53 1
69 FIRST J101057.0+300020 rG 10 10 57.154 +30 00 21.53   22.50   19.40   ~ 2 0
70 2MASS J10123050+2825275 Sy1 10 12 30.507 +28 25 27.52   22.78 21.85 20.80   ~ 13 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 NVSS J101813+190303 rG 10 18 13.1638086984 +19 03 04.164940260   20.70   19.95   ~ 6 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   ~ 12 0
78 2MASS J10225744+1628405 Sy2 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   ~ 19 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 rG 10 43 35.711 +19 28 21.31   21.94   19.62   ~ 2 0
82 2MASS J10435532+2157182 rG 10 43 55.321 +21 57 18.30   21.32   19.65   ~ 2 0
83 SDSS J104642.59+160416.8 Sy1 10 46 42.5871592488 +16 04 16.871483604   22.2   19.9   ~ 3 0
84 FIRST J104902.9+401031 rG 10 49 02.985 +40 10 31.56   24.07 22.86 19.66   ~ 4 0
85 FIRST J104918.2+154458 rG 10 49 18.240 +15 44 58.66   22.50   20.80   ~ 4 0
86 ICRF J110607.2+281247 Bla 11 06 07.26174303 +28 12 47.0650016   19.20 18.75 20.02   ~ 93 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   ~ 40 0
89 NVSS J111725+315531 rG 11 17 25.027 +31 55 30.94   21.5   19.2   ~ 7 1
90 4C -02.46 BLL 11 17 33.8466607296 -02 36 00.428337720   20.27   18.75   ~ 21 1
91 2MASS J11181104-0033409 Sy1 11 18 11.044 -00 33 40.91   21.63 20.89 19.87   ~ 13 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 Sy2 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   ~ 69 1
96 6C 114419+401458 Bla 11 46 58.29791724 +39 58 34.3043988   18.80 18.45 18.58   ~ 261 1
97 2MASS J11512411+5359567 Sy1 11 51 24.1006822824 +53 59 57.195191512   21.43 21.04 20.80   ~ 14 0
98 2MASS J11534443+2905237 Q? 11 53 44.433 +29 05 23.77   21.68   19.25   ~ 2 0
99 Ton 599 Bla 11 59 31.83391383 +29 14 43.8268224   14.80 14.41 17.652 13.39 ~ 989 1
100 NVSS J120111-033219 rG 12 01 11.1400644432 -03 32 19.564668600   22.50   19.40   ~ 5 1
101 2MASS J12025534+2615189 Sy2 12 02 55.34 +26 15 19.0   20.69 20.69 19.34   ~ 7 0
102 NVSS J120618+285717 rG 12 06 18.416 +28 57 19.91   20.76   19.30   ~ 2 0
103 NVSS J120827+170816 rG 12 08 27.758 +17 08 14.07   22.11   19.40   ~ 2 0
104 2MASS J12092107-0107168 Sy1 12 09 21.0894344160 -01 07 17.001623100   20.07 19.22 17.86   ~ 9 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   ~ 28 0
107 FIRST J122924.8+250921 rG 12 29 24.80001 +25 09 20.6835   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   ~ 84 1
110 2MASS J13040409+4612537 Sy1 13 04 04.0992255002 +46 12 53.473274704   19.86   18.32   ~ 3 0
111 2MASS J13070066+2338050 Sy1 13 07 00.6300561336 +23 38 05.144506728   20.81 19.92 19.37   ~ 28 0
112 FIRST J132115.2+410515 rG 13 21 15.2321202024 +41 05 15.687303972   20.59   18.94   ~ 4 0
113 [VV2006] J134108.1+330110 QSO 13 41 08.1099993672 +33 01 10.348643496   22.80 21.68 20.80   ~ 19 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   ~ 10 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 Sy1 14 08 11.616 +32 43 50.64   22.50   19.59   ~ 4 0
119 2MASS J14121426+2912084 QSO 14 12 14.2996682376 +29 12 08.253527976   20.87   19.42   ~ 4 0
120 2MASS J14152285+3333063 Sy1 14 15 22.8479116272 +33 33 06.493910328   20.84 19.89 18.92   ~ 5 0
121 FIRST J142112.8+360850 rG 14 21 12.9068877006 +36 08 50.659532580   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 Bla 14 25 49.01801221 +14 24 56.9018642   18.35 17.96 19.54   ~ 57 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 NVSS J144659-005015 rG 14 46 59.878 -00 50 15.13   21.52 20.64 18.94   ~ 8 1
127 FIRST J144812.1+305614 rG 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   ~ 8 0
129 6C 145643+355455 QSO 14 58 43.4098195728 +35 42 57.654297468   20.63   18.96   ~ 9 2
130 ICRF J145844.7+372021 BLL 14 58 44.7945139728 +37 20 21.622681212   20.30 19.81 19.43   ~ 99 1
131 2MASS J15315047+2423178 QSO 15 31 50.4620222616 +24 23 17.732350032   20.52   19.17   ~ 15 0
132 SDSS J153233.17+241525.7 Sy1 15 32 33.177 +24 15 25.79   20.6   20.1   ~ 12 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   ~ 40 0
135 FIRST J155523.7+341939 rG 15 55 23.70744 +34 19 38.0352   20.8   19.2   ~ 1 0
136 2MASS J16003457+3522267 Sy1 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 FIRST J161454.0+351413 rG 16 14 54.13008 +35 14 13.4592   22.1   19.3   ~ 1 0
140 7C 161618.10+350919.00 QSO 16 18 09.7431395277 +35 02 08.822832862   20.20   18.25   ~ 13 1
141 3C 345 Bla 16 42 58.80997043 +39 48 36.9939552   16.81 16.59 16.84   ~ 1808 3
142 2MASS J16540768+3435270 Sy2 16 54 07.6779832272 +34 35 27.150424512   20.0   18.3   ~ 2 0
143 2MASS J16564712+3821367 Sy1 16 56 47.128 +38 21 36.70   23.70 22.68 20.80   ~ 16 0
144 2MASS J17042532+3037088 Sy1 17 04 25.3188884976 +30 37 09.046443684   20.52   20.80   ~ 3 0
145 2MASS J17080253+2227240 Sy1 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   ~ 106 1
148 2MASS J17242802+3331201 Sy1 17 24 28.0205801016 +33 31 20.092537560           ~ 4 0
149 2MASS J17335318+4124555 Q? 17 33 53.18616 +41 24 55.5156   21.0   19.0   ~ 1 0
150 SDSS J221633.72-005451.7 Sy1 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 FIRST J222438.3-000750 rG 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   ~ 93 1
154 2MASS J23110462-0214580 rG 23 11 04.626 -02 14 58.07   22.05   19.51   ~ 2 0
155 2MASS J23254988-1052441 Sy1 23 25 49.8862601208 -10 52 43.891375872   20.98 20.13 19.70   ~ 8 0
156 6dFGS gJ232821.7-110703 Sy2 23 28 21.7486530792 -11 07 02.972551332   19.84   18.36   ~ 12 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 rG 23 45 54.900 -10 03 29.31   21.18   18.48   ~ 3 0
159 2MASS J23504009-1043597 rG 23 50 40.097 -10 43 59.79   21.27   19.24   ~ 3 0

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