2013ApJ...778..127G


Query : 2013ApJ...778..127G

2013ApJ...778..127G - Astrophys. J., 778, 127 (2013/December-1)

Dust reddened quasars in FIRST and UKIDSS: beyond the tip of the iceberg.

GLIKMAN E., URRUTIA T., LACY M., DJORGOVSKI S.G., URRY M., CROOM S., SCHNEIDER D.P., MAHABAL A., GRAHAM M. and GE J.

Abstract (from CDS):

We present the results of a pilot survey to find dust-reddened quasars by matching the Faint Images of the Radio Sky at Twenty-Centimeters (FIRST) radio catalog to the UKIDSS near-infrared survey and using optical data from Sloan Digital Sky Survey to select objects with very red colors. The deep K-band limit provided by UKIDSS allows for finding more heavily reddened quasars at higher redshifts as compared with previous work using FIRST and Two Micron All Sky Survey (2MASS). We selected 87 candidates with K ≤ 17.0 from the UKIDSS Large Area Survey (LAS) First Data Release (DR1), which covers 190 deg2. These candidates reach up to ∼1.5 mag below the 2MASS limit and obey the color criteria developed to identify dust-reddened quasars. We have obtained 61 spectroscopic observations in the optical and/or near-infrared, as well as classifications in the literature, and have identified 14 reddened quasars with E(B - V) > 0.1, including 3 at z > 2. We study the infrared properties of the sample using photometry from the Wide-Field Infrared Survey Explorer and find that infrared colors improve the efficiency of red quasar selection, removing many contaminants in an infrared-to-optical color-selected sample alone. The highest-redshift quasars (z ≳ 2) are only moderately reddened, with E(B - V) ∼ 0.2-0.3. We find that the surface density of red quasars rises sharply with faintness, comprising up to 17% of blue quasars at the same apparent K-band flux limit. We estimate that to reach more heavily reddened quasars (i.e., E(B - V) ≳ 0.5) at z > 2 and a depth of K = 17, we would need to survey at least ∼2.5 times more area.

Abstract Copyright:

Journal keyword(s): dust, extinction - galaxies: evolution - quasars: general - surveys

VizieR on-line data: <Available at CDS (J/ApJ/778/127): table1.dat table2.dat>

Nomenclature: Table 1: [GUL2013] JHHMMSS.ss+DDMMSS.s N=87, Table 2: [GUL2013] UKFS HHMM+DDMM N=14.

Simbad objects: 88

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Number of rows : 88
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2023
#notes
1 SDSS J001242.67-004514.7 QSO 00 12 42.671 -00 45 14.78           ~ 1 0
2 SDSS J001600.60-003859.2 QSO 00 16 00.603 -00 38 59.29           ~ 9 0
3 [GUL2013] J002054.02+002026.6 G 00 20 53.932 +00 20 26.76           ~ 1 0
4 [GUL2013] J002742.22+000540.6 G 00 27 42.144 +00 05 39.58           ~ 1 0
5 FIRST J003004.9+002501 QSO 00 30 04.955 +00 25 01.43 19.71   18.87     ~ 2 0
6 FIRST J003659.8-011332 QSO 00 36 59.8312535184 -01 13 32.518899516   21.63 20.76 20.023 18.630 ~ 10 0
7 [GUL2013] J004345.18-000208.0 G 00 43 45.146 -00 02 07.09           ~ 1 0
8 [GUL2013] J012033.54+005459.2 Q? 01 20 33.541 +00 54 59.19           ~ 1 0
9 [GUL2013] J012615.13+003747.5 G 01 26 15.122 +00 37 47.76           ~ 1 0
10 QSO B0131-001 QSO 01 34 12.70415461 +00 03 45.1386194   23.34 22.50 20.780   ~ 35 1
11 [GUL2013] J013518.88+001222.4 G 01 35 18.878 +00 12 21.78           ~ 1 0
12 SDSS J013539.44-004322.1 QSO 01 35 39.45408 -00 43 22.1484           ~ 2 0
13 [GUL2013] J013723.46-000537.5 G 01 37 23.450 -00 05 37.73           ~ 1 0
14 [GUL2013] J013724.82+000950.8 G 01 37 24.848 +00 09 49.13           ~ 1 0
15 SDSS J014131.02+010100.6 QSO 01 41 31.02624 +01 01 00.5988           ~ 8 0
16 [GUL2013] J014216.05+011511.7 AGN 01 42 15.987 +01 15 11.38           ~ 1 0
17 ICRF J015243.1+002039 QSO 01 52 43.14997065 +00 20 39.7114838   20.98 20.72     ~ 35 1
18 [GUL2013] J015416.31-000305.9 G 01 54 16.396 -00 03 04.73           ~ 1 0
19 SDSS J015453.73+001018.0 G 01 54 53.732 +00 10 18.03           ~ 1 0
20 FIRST J015647.6-005807 QSO 01 56 47.607 -00 58 07.76   21.12 20.47 19.88   ~ 7 0
21 SDSS J015821.10+002752.7 QSO 01 58 21.107 +00 27 52.77           ~ 1 0
22 [GUL2013] J020023.33+000341.8 G 02 00 23.298 +00 03 42.11           ~ 1 0
23 [GUL2013] J020315.86-001432.7 G 02 03 15.762 -00 14 33.19           ~ 1 0
24 [GUL2013] J020343.31-010224.5 G 02 03 43.330 -01 02 24.67           ~ 1 0
25 SDSS J020445.39-010612.9 BiC 02 04 45.393 -01 06 12.93           ~ 2 0
26 [GUL2013] J020907.50-010544.3 AGN 02 09 07.499 -01 05 44.35           ~ 2 0
27 FIRST J021038.9-000547 Q? 02 10 38.897 -00 05 47.54           ~ 1 0
28 [GUL2013] J021145.81+005213.6 G 02 11 45.820 +00 52 13.57           ~ 1 0
29 [GUL2013] J021345.40+002436.6 Q? 02 13 45.4483 +00 24 36.112           ~ 2 0
30 [GUL2013] J021550.90-004245.2 G 02 15 50.925 -00 42 46.40           ~ 1 0
31 [GUL2013] J021652.99-010233.3 G 02 16 52.975 -01 02 33.51           ~ 1 0
32 [GUL2013] J022003.61-000027.3 G 02 20 03.600 -00 00 28.09           ~ 1 0
33 [GUL2013] J022301.17+001009.2 QSO 02 23 01.203 +00 10 09.40           ~ 1 0
34 [GUL2013] J022518.77+003416.9 G 02 25 18.777 +00 34 16.53           ~ 1 0
35 [GUL2013] J022534.32+010838.1 G 02 25 34.301 +01 08 37.51           ~ 1 0
36 [GUL2013] J022827.41-000240.1 G 02 28 27.406 -00 02 39.44           ~ 1 0
37 [GUL2013] J023311.60+001721.2 G 02 33 11.638 +00 17 19.64           ~ 1 0
38 [GUL2013] J024748.93-005628.2 G 02 47 48.933 -00 56 27.89           ~ 1 0
39 [GUL2013] J025120.04-002349.1 G 02 51 20.000 -00 23 49.13           ~ 1 0
40 [GUL2013] J030007.15+005321.0 G 03 00 07.152 +00 53 19.77           ~ 1 0
41 [GUL2013] J030037.23+010443.6 G 03 00 37.272 +01 04 41.82           ~ 1 0
42 [GUL2013] J030137.10+004321.7 G 03 01 37.085 +00 43 21.73           ~ 1 0
43 [GUL2013] J030339.85+010623.2 G 03 03 39.836 +01 06 23.14           ~ 1 0
44 NVSS J081906+044624 Rad 08 19 06.381 +04 46 27.20           ~ 1 0
45 FIRST J082056.3+045340 Q? 08 20 56.359 +04 53 39.81           ~ 1 0
46 FIRST J082209.4+052318 Q? 08 22 09.479 +05 23 19.10           ~ 1 0
47 [GUL2013] J082930.69+044934.3 Q? 08 29 30.694 +04 49 34.25           ~ 1 0
48 SDSS J083026.56+050522.9 * 08 30 26.5645961448 +05 05 22.958692692           ~ 1 0
49 FIRST J083719.7-011518 Q? 08 37 19.725 -01 15 18.57           ~ 1 0
50 [GUL2013] J083759.43+050611.1 G 08 37 59.344 +05 06 09.82           ~ 1 0
51 [GUL2013] J090635.91+060732.8 * 09 06 35.857 +06 07 31.44           ~ 1 0
52 [GUL2013] J090846.11+052843.3 Sy2 09 08 46.105 +05 28 43.11   21.82 21.43     ~ 4 0
53 NVSS J090917+054108 * 09 09 17.306 +05 41 11.32           ~ 1 0
54 [GUL2013] J092543.94-025747.1 Q? 09 25 43.943 -02 57 47.12           ~ 1 0
55 [GUL2013] J093852.20-020059.5 Q? 09 38 52.204 -02 00 59.50           ~ 1 0
56 [GUL2013] J094252.91-014721.1 G 09 42 52.952 -01 47 20.95           ~ 1 0
57 NVSS J094732-021509 G 09 47 32.595 -02 15 10.25           ~ 1 0
58 [GUL2013] J094814.15+061742.2 G 09 48 14.128 +06 17 42.01           ~ 1 0
59 FIRST J094820.1-030847 Q? 09 48 20.144 -03 08 47.47           ~ 1 0
60 NVSS J095143-030910 Rad 09 51 43.305 -03 09 06.45           ~ 1 0
61 NVSS J095511-030034 Rad 09 55 12.417 -03 00 31.68           ~ 1 0
62 NVSS J100133-022515 G 10 01 33.054 -02 25 16.30           ~ 1 0
63 [GUL2013] J101741.40+074800.6 * 10 17 41.404 +07 48 00.41           ~ 1 0
64 [GUL2013] J125805.74-001419.0 G 12 58 05.673 -00 14 20.77           ~ 1 0
65 NVSS J131430+001336 G 13 14 30.149 +00 13 40.75           ~ 1 0
66 ULAS J131910.65+000956.1 ev 13 19 10.702 +00 09 55.61           ~ 4 0
67 [GUL2013] J135033.48-002442.3 G 13 50 33.546 -00 24 41.40           ~ 1 0
68 [GUL2013] J140643.69-001147.1 * 14 06 43.791 -00 11 47.53           ~ 1 0
69 [GUL2013] J153347.27+054150.9 * 15 33 47.207 +05 41 52.18           ~ 1 0
70 IC 4553 SyG 15 34 57.22396 +23 30 11.6084   14.76 13.88     ~ 2859 4
71 [GUL2013] J154246.51+053604.7 G 15 42 46.526 +05 36 03.93           ~ 1 0
72 [GUL2013] J154401.86+053451.8 G 15 44 01.868 +05 34 51.51           ~ 1 0
73 NVSS J222055-005013 G 22 20 55.622 -00 50 13.69           ~ 1 0
74 [GUL2013] J222209.79-004421.3 G 22 22 09.774 -00 44 21.07           ~ 1 0
75 [GUL2013] J222517.81-001718.0 G 22 25 17.792 -00 17 18.66           ~ 1 0
76 SDSS J223059.56+002209.2 QSO 22 30 59.563 +00 22 09.22           ~ 1 0
77 [GUL2013] J223819.00+010509.3 Q? 22 38 18.996 +01 05 09.31           ~ 1 0
78 [GUL2013] J224239.86-003847.6 AGN 22 42 39.827 -00 38 47.85           ~ 1 0
79 FIRST J224338.0+001749 AG? 22 43 38.0414 +00 17 49.993           ~ 5 0
80 [GUL2013] J224548.33-001456.1 G 22 45 48.314 -00 14 56.32           ~ 1 0
81 [GUL2013] J225009.90+001041.0 Q? 22 50 09.943 +00 10 42.41           ~ 1 0
82 [GUL2013] J225423.44+002758.4 G 22 54 23.457 +00 27 57.90           ~ 1 0
83 SDSS J233452.45-002422.7 QSO 23 34 52.456 -00 24 22.73           ~ 1 0
84 [GUL2013] J233454.44+001610.5 G 23 34 54.438 +00 16 10.27           ~ 1 0
85 [GUL2013] J233633.52-004957.3 G 23 36 33.549 -00 49 56.83           ~ 1 0
86 [GUL2013] J233723.59-005811.3 Q? 23 37 23.596 -00 58 10.80           ~ 1 0
87 [GUL2013] J233756.73-003222.6 G 23 37 56.734 -00 32 22.91           ~ 1 0
88 [GUL2013] J234015.28-001033.7 G 23 40 15.270 -00 10 33.82           ~ 1 0

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2022.11.30-11:52:31

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