2006ApJ...642..673P

Query : 2006ApJ...642..673P

2006ApJ...642..673P - Astrophys. J., 642, 673-693 (2006/May-2)

Chandra and Spitzer unveil heavily obscured quasars in the Chandra/SWIRE survey.

POLLETTA M.D.C., WILKES B.J., SIANA B., LONSDALE C.J., KILGARD R., SMITH H.E., KIM D.-W., OWEN F., EFSTATHIOU A., JARRETT T., STACEY G., FRANCESCHINI A., ROWAN-ROBINSON M., BABBEDGE T.S.R., BERTA S., FANG F., FARRAH D., GONZALEZ-SOLARES E., MORRISON G., SURACE J.A. and SHUPE D.L.

Abstract (from CDS):

Using the large multiwavelength data set in the Chandra/SWIRE Survey (0.6 deg2 in the Lockman Hole), we show evidence for the existence of highly obscured (Compton-thick) AGNs, estimate a lower limit to their surface density, and characterize their multiwavelength properties. Two independent selection methods based on the X-ray and infrared spectral properties are presented. The two selected samples contain (1) five X-ray sources with hard X-ray spectra and column densities ≳1024/cm2 and (2) 120 infrared sources with red and AGN-dominated infrared SEDs. We estimate a surface density of at least 25 Compton-thick AGNs/deg2 detected in the infrared in the Chandra/SWIRE field, of which ∼40% show distinct AGN signatures in their optical/near-infrared SEDs, the remaining being dominated by the host galaxy emission. Only ∼33% of all Compton-thick AGNs are detected in the X-rays at our depth [F(0.3-8 keV)>10–15 ergs/cm2/s]. We report the discovery of two sources in our sample of Compton-thick AGNs, SWIRE J104409.95+585224.8 (z=2.54) and SWIRE J104406.30+583954.1 (z=2.43), which are the most luminous Compton-thick AGNs at high z currently known. The properties of these two sources are discussed in detail with an analysis of their spectra, SEDs, luminosities, and black hole masses.

Abstract Copyright: ∼

Journal keyword(s): Galaxies: Active - Infrared: Galaxies - quasars: individual (SWIRE J104409.95+585224.8) - quasars: individual (SWIRE J104406.30+583954.1) - X-Rays: Galaxies

VizieR on-line data: <Available at CDS (J/ApJ/642/673): table4.dat>

Nomenclature: Table 4: SWIRE JHHMMSS.ss+DDMMSS.s N=120.

CDS comments: CXO 52 is CXOU J084837.9+445352

Simbad objects: 135

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Number of rows : 135
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 NAME SMC G 00 52 38.0 -72 48 01   2.79 2.2     ~ 12317 1
2 M 77 Sy2 02 42 40.7091669408 -00 00 47.859690204 9.70 9.61 8.87 10.1 9.9 ~ 4897 2
3 CXOCDFS J033218.9-275136 Sy2 03 32 18.8321 -27 51 35.476   25.15   24.51 25.128 ~ 83 0
4 [VV2006] J033229.9-275106 Sy2 03 32 29.8487 -27 51 05.879   27.5675 25.05 23.970 24.5370 ~ 101 0
5 [STS2002] 52 AGN 08 48 38.0 +44 53 53       24.220   ~ 32 0
6 SWIRE J104229.75+591154.6 IR 10 42 29.75 +59 11 54.6           ~ 1 0
7 SWIRE J104241.45+591357.2 X 10 42 41.42 +59 13 57.5           ~ 3 0
8 CLANS 17 Sy2 10 42 54.51 +59 10 13.3           ~ 4 0
9 SWIRE J104257.62+590438.9 IR 10 42 57.62 +59 04 38.9           ~ 1 0
10 SWIRE J104301.13+591214.4 IR 10 43 01.13 +59 12 14.4           ~ 1 0
11 5MUSES 103 G 10 43 03.520 +58 57 18.27           ~ 8 0
12 CLANS 33 Sy2 10 43 10.33 +58 59 16.5   24.42 24.03     ~ 4 0
13 SWIRE J104311.22+591128.2 AGN 10 43 11.23 +59 11 28.8           ~ 3 0
14 SWIRE J104311.81+590649.9 IR 10 43 11.82 +59 06 49.9           ~ 1 0
15 SWIRE J104314.93+585606.3 QSO 10 43 14.93 +58 56 06.3           ~ 7 0
16 SDSS J104321.33+590943.0 Sy1 10 43 21.3340682952 +59 09 42.967732356   21.58 20.64     ~ 16 0
17 SWIRE J104322.07+590648.7 AGN 10 43 22.08 +59 06 49.3           ~ 3 0
18 SWIRE J104323.61+590218.3 IR 10 43 23.61 +59 02 18.3           ~ 1 0
19 SWIRE J104344.33+585102.5 IR 10 43 44.33 +58 51 02.5           ~ 1 0
20 CLANS 113 SyG 10 43 51.92 +58 49 53.6   25.10 23.77 23.10   ~ 7 0
21 CLANS 116 SyG 10 43 53.42 +58 53 16.5   24.11 23.19     ~ 4 0
22 SWIRE J104359.52+590156.3 IR 10 43 59.52 +59 01 56.3           ~ 1 0
23 SWIRE J104359.77+585811.3 IR 10 43 59.77 +58 58 11.3           ~ 1 0
24 SWIRE J104402.02+584504.9 IR 10 44 02.02 +58 45 04.9           ~ 1 0
25 [VV2010c] J104406.3+583954 QSO 10 44 06.32 +58 39 54.9 24.27     23.40   ~ 11 0
26 CLANS 146 Sy2 10 44 06.68 +58 51 31.3           ~ 4 0
27 SWIRE J104407.69+585125.9 IR 10 44 07.69 +58 51 25.9           ~ 1 0
28 SWIRE J104407.67+584011.3 AGN 10 44 07.78 +58 40 12.1           ~ 4 0
29 SDSS J104407.97+584437.0 Sy1 10 44 07.9765376019 +58 44 37.101764396   22.44 21.00 20.10   ~ 21 0
30 SWIRE J104408.30+590455.4 IR 10 44 08.30 +59 04 55.4           ~ 1 0
31 [OM2008] 100 QSO 10 44 09.95 +58 52 24.7 24.29     23.56   ~ 29 0
32 SWIRE J104414.18+584644.6 IR 10 44 14.18 +58 46 44.6           ~ 1 0
33 SWIRE J104414.37+584320.4 IR 10 44 14.37 +58 43 20.4           ~ 1 0
34 CLANS 182 X 10 44 20.24 +58 39 48.1           ~ 3 0
35 SDSS J104422.63+591304.3 Sy2 10 44 22.650 +59 13 04.13   22.95 22.01     ~ 11 0
36 SWIRE J104423.99+584638.3 IR 10 44 23.99 +58 46 38.3           ~ 1 0
37 CLANS 214 Sy1 10 44 31.97 +59 04 57.0   23.47 23.03     ~ 5 0
38 SWIRE J104444.84+585019.5 IR 10 44 44.83 +58 50 19.5           ~ 1 0
39 SWIRE J104447.56+585918.7 rG 10 44 47.57 +58 59 18.8           ~ 2 0
40 SWIRE J104458.45+590314.0 rG 10 44 58.49 +59 03 14.3           ~ 2 0
41 SWIRE J104459.07+590705.3 IR 10 44 59.07 +59 07 05.3           ~ 1 0
42 NAME Lockman Hole reg 10 45 00.0 +58 00 00           ~ 910 0
43 SWIRE J104500.71+591353.4 X 10 45 00.67 +59 13 53.4           ~ 3 0
44 CLANS 282 G 10 45 03.58 +58 51 09.9           ~ 3 0
45 CLANS 284 SyG 10 45 04.99 +58 59 48.3           ~ 7 0
46 SWIRE J104524.91+591626.7 IR 10 45 24.91 +59 16 26.7           ~ 1 0
47 SWIRE J104525.21+585949.3 X 10 45 25.21 +58 59 49.6           ~ 3 0
48 SWIRE J104526.75+583526.0 IR 10 45 26.75 +58 35 26.0           ~ 1 0
49 CLANS 333 Sy1 10 45 28.3 +58 36 50   23.00 22.31     ~ 3 0
50 SWIRE J104528.29+591326.7 QSO 10 45 28.33 +59 13 26.9       23.68   ~ 16 0
51 SWIRE J104530.65+585936.8 IR 10 45 30.65 +58 59 36.8           ~ 1 0
52 SWIRE J104531.45+591027.0 X 10 45 31.39 +59 10 27.6           ~ 3 0
53 CLANS 343 G 10 45 32.99 +58 46 39.0           ~ 3 0
54 SWIRE J104533.47+590541.1 IR 10 45 33.47 +59 05 41.1           ~ 1 0
55 SWIRE J104534.22+591400.3 IR 10 45 34.22 +59 14 00.3           ~ 1 0
56 CLANS 374 rG 10 45 51.78 +59 03 45.6           ~ 4 0
57 SWIRE J104554.47+592322.2 IR 10 45 54.47 +59 23 22.2           ~ 1 0
58 SWIRE J104558.79+583812.9 IR 10 45 58.79 +58 38 12.9           ~ 1 0
59 SWIRE J104604.78+591625.3 IR 10 46 04.78 +59 16 25.3           ~ 1 0
60 SWIRE J104605.11+584310.8 IR 10 46 05.11 +58 43 10.8           ~ 1 0
61 SWIRE J104605.54+583742.5 AGN 10 46 05.56 +58 37 42.4           ~ 4 0
62 SWIRE J104609.55+590849.0 IR 10 46 09.55 +59 08 49.0           ~ 1 0
63 SWIRE J104616.93+585457.1 X 10 46 16.93 +58 54 57.5           ~ 3 0
64 SWIRE J104622.31+585036.0 IR 10 46 22.31 +58 50 36.0           ~ 1 0
65 SWIRE J104623.23+584410.9 IR 10 46 23.22 +58 44 10.9           ~ 1 0
66 SWIRE J104627.46+584049.2 IR 10 46 27.46 +58 40 49.2           ~ 1 0
67 SWIRE J104632.92+590820.9 IR 10 46 32.92 +59 08 20.9           ~ 1 0
68 SWIRE J104633.29+584820.3 IR 10 46 33.31 +58 48 20.4           ~ 2 0
69 SWIRE J104633.45+590016.7 IR 10 46 33.45 +59 00 16.7           ~ 1 0
70 SWIRE J104635.87+590748.8 IR 10 46 35.87 +59 07 48.8           ~ 1 0
71 SWIRE J104637.25+585252.4 IR 10 46 37.25 +58 52 52.4           ~ 1 0
72 SWIRE J104637.57+590014.6 IR 10 46 37.57 +59 00 14.6           ~ 1 0
73 SWIRE J104638.87+591931.4 IR 10 46 38.87 +59 19 31.4           ~ 1 0
74 SWIRE J104641.38+585213.9 X 10 46 41.39 +58 52 13.7           ~ 3 0
75 [VV2010] J104644.1+590028 QSO 10 46 44.07 +59 00 28.7   23.40 22.84     ~ 5 0
76 SWIRE J104650.27+592602.8 IR 10 46 50.27 +59 26 02.8           ~ 1 0
77 SWIRE J104657.15+592152.8 IR 10 46 57.15 +59 21 52.8           ~ 1 0
78 SWIRE J104658.67+584042.4 IR 10 46 58.67 +58 40 42.4           ~ 1 0
79 SWIRE J104659.42+584624.1 G 10 46 59.42 +58 46 24.1           ~ 2 0
80 SWIRE J104700.2+590107 rG 10 47 00.20 +59 01 07.6           ~ 8 0
81 SWIRE J104703.99+585039.9 IR 10 47 03.99 +58 50 39.9           ~ 1 0
82 SWIRE J104704.33+591142.9 IR 10 47 04.32 +59 11 42.9           ~ 1 0
83 CLANS 541 G 10 47 05.26 +58 58 50.4           ~ 3 0
84 SWIRE J104705.31+584420.3 IR 10 47 05.31 +58 44 20.3           ~ 1 0
85 SWIRE J104705.49+590919.4 IR 10 47 05.49 +59 09 19.4           ~ 1 0
86 SWIRE J104708.05+585026.3 IR 10 47 08.04 +58 50 26.3           ~ 1 0
87 SWIRE J104708.15+585721.1 IR 10 47 08.15 +58 57 21.1           ~ 1 0
88 SWIRE J104708.92+584524.1 IR 10 47 08.92 +58 45 24.1           ~ 1 0
89 SWIRE J104714.84+591916.5 IR 10 47 14.83 +59 19 16.5           ~ 1 0
90 SWIRE J104718.10+585526.2 IR 10 47 18.10 +58 55 26.2           ~ 1 0
91 SWIRE J104720.43+590107.9 IR 10 47 20.43 +59 01 07.9           ~ 1 0
92 CLANS 598 Sy1 10 47 25.95 +59 10 25.9   23.79 22.21     ~ 5 0
93 SWIRE J104726.03+591305.5 IR 10 47 26.03 +59 13 05.5           ~ 1 0
94 SWIRE J104728.64+585346.1 IR 10 47 28.64 +58 53 46.1           ~ 1 0
95 CLANS 607 G 10 47 31.74 +59 24 32.9           ~ 3 0
96 SWIRE J104733.37+591200.9 IR 10 47 33.36 +59 12 00.9           ~ 1 0
97 CLANS 613 G 10 47 33.46 +59 21 07.8           ~ 3 0
98 SWIRE J104734.47+591332.9 IR 10 47 34.47 +59 13 32.9           ~ 1 0
99 SWIRE J104734.57+584338.7 IR 10 47 34.57 +58 43 38.7           ~ 1 0
100 SWIRE J104735.76+584707.3 IR 10 47 35.76 +58 47 07.3           ~ 1 0
101 CLANS 617 G 10 47 35.93 +59 05 50.0           ~ 3 0
102 CLANS 620 X 10 47 37.06 +59 19 40.7           ~ 3 0
103 SWIRE J104746.64+585113.5 IR 10 47 46.64 +58 51 13.5           ~ 1 0
104 SWIRE J104746.79+591759.2 IR 10 47 46.79 +59 17 59.2           ~ 1 0
105 SWIRE J104747.72+585903.9 IR 10 47 47.72 +58 59 03.9           ~ 1 0
106 SWIRE J104748.20+590905.7 G 10 47 48.18 +59 09 06.0           ~ 2 0
107 SWIRE J104748.27+590534.7 X 10 47 48.28 +59 05 34.6           ~ 3 0
108 CLANS 647 G 10 47 49.60 +58 48 45.6           ~ 3 0
109 SWIRE J104754.20+590956.3 IR 10 47 54.20 +59 09 56.3           ~ 1 0
110 SWIRE J104754.71+591137.2 IR 10 47 54.71 +59 11 37.2           ~ 1 0
111 CLANS 658 X 10 47 54.80 +59 08 10.3           ~ 3 0
112 SWIRE J104802.42+592656.5 IR 10 48 02.42 +59 26 56.5           ~ 1 0
113 SWIRE J104803.66+592252.5 IR 10 48 03.66 +59 22 52.5           ~ 1 0
114 SWIRE J104806.02+584456.4 IR 10 48 06.02 +58 44 56.4           ~ 1 0
115 SWIRE J104811.23+592206.8 IR 10 48 11.23 +59 22 06.8           ~ 1 0
116 SWIRE J104813.49+590340.7 X 10 48 13.55 +59 03 41.0           ~ 3 0
117 SWIRE J104820.64+592436.6 IR 10 48 20.64 +59 24 36.6           ~ 1 0
118 SWIRE J104825.76+591338.9 X 10 48 25.89 +59 13 38.2           ~ 3 0
119 SWIRE J104826.92+592116.1 IR 10 48 26.92 +59 21 16.1           ~ 1 0
120 CLANS 727 G 10 48 27.04 +58 54 39.5           ~ 3 0
121 SDSS J104829.50+591249.0 Sy1 10 48 29.505 +59 12 49.09   22.54 21.36     ~ 5 0
122 SWIRE J104831.65+592004.6 IR 10 48 31.65 +59 20 04.6           ~ 1 0
123 CLANS 737 G 10 48 36.78 +58 54 15.1           ~ 3 0
124 SWIRE J104838.01+591702.6 IR 10 48 38.01 +59 17 02.6           ~ 1 0
125 SWIRE J104844.25+585139.4 IR 10 48 44.25 +58 51 39.4           ~ 1 0
126 SWIRE J104851.80+591019.8 IR 10 48 51.80 +59 10 19.8           ~ 1 0
127 SWIRE J104903.66+590006.9 IR 10 49 03.59 +59 00 07.3           ~ 3 0
128 SWIRE J104913.37+585946.3 IR 10 49 13.37 +58 59 46.3           ~ 1 0
129 SWIRE J104955.03+584742.8 IR 10 49 55.03 +58 47 42.8           ~ 1 0
130 M 87 AGN 12 30 49.42338414 +12 23 28.0436859 10.16 9.59 8.63   7.49 ~ 7815 3
131 Z 294-4 Sy1 12 56 14.2341182928 +56 52 25.238373852   14.68 13.84     ~ 2096 3
132 NGC 4945 Sy2 13 05 27.279 -49 28 04.44   9.31 14.40 7.55   ~ 1582 2
133 NAME Circinus Galaxy Sy2 14 13 09.906 -65 20 20.47   10.89 9.84 10.6 10.0 ~ 1331 1
134 NGC 6240 Sy2 16 52 58.9 +02 24 03   14.31 13.37     ~ 1734 2
135 NAME Super Antennae Sy2 19 31 21.4272801984 -72 39 21.442847832   17.39 16.37 14.65   ~ 318 3

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