2002AJ....123.2223S

Query : 2002AJ....123.2223S

2002AJ....123.2223S - Astron. J., 123, 2223-2245 (2002/May-0)

SPICES II: optical and near-infrared identifications of faint X-ray sources from deep Chandra observations of Lynx.

STERN D., TOZZI P., STANFORD S.A., ROSATI P., HOLDEN B., EISENHARDT P., ELSTON R., WU K.L., CONNOLLY A., SPINRAD H., DAWSON S., DEY A. and CHAFFEE F.H.

Abstract (from CDS):

We present our first results on field X-ray sources detected in a deep, 184.7 ks observation with the Advanced CCD Imaging Spectrometer (ACIS-I) on the Chandra X-Ray Observatory. The observations target the Lynx field (α=08h48m, δ=+44°54') of SPICES, the Spectroscopic Photometric Infrared-Chosen Extragalactic Survey, which contains three known X-ray-emitting clusters at redshifts of z=0.57, 1.26, and 1.27. Not including the known clusters, in the 17'x17' ACIS-I field we detect 132 sources in the 0.5-2 keV (soft) X-ray band down to a limiting flux of ~1.7x10–16 ergs.cm–2.s–1 and 111 sources in the 2-10 keV (hard) X-ray band down to a limiting flux of ~1.3x10–15 ergs.cm–2.s–1. The combined catalog contains a total of 153 sources, of which 42 are detected only in the soft band and 21 are detected only in the hard band. Confirming previous Chandra results, we find that the fainter sources have harder X-ray spectra, providing a consistent solution to the long-standing ``spectral paradox.'' From deep optical and near-infrared follow-up data, 77% of the X-ray sources have optical counterparts to I=24, and 71% of the X-ray sources have near-infrared counterparts to Ks=20. Four of the 24 sources in the near-IR field are associated with extremely red objects (EROs; I-K_s_≥4). We have obtained spectroscopic redshifts with the Keck telescopes of 18 of the Lynx Chandra sources. These sources comprise a mix of broad-lined active galaxies, apparently normal galaxies, and two late-type Galactic dwarfs. Intriguingly, one Galactic source is identified with an M7 dwarf exhibiting nontransient, hard X-ray emission. Thirteen of the Chandra sources are located within regions for which we have Hubble Space Telescope imaging. Nine of the sources are detected, showing a range of morphologies: several show compact cores embedded within diffuse emission, while others are spatially extended showing typical galaxy morphologies. Two of the Chandra sources in this subsample appear to be associated with mergers. We briefly review non-active galactic nucleus mechanisms to produce X-ray emission and discuss properties of the Lynx Chandra sample in relation to other samples of X-ray and non-X-ray sources.

Abstract Copyright: ∼

Journal keyword(s): Cosmology: Observations - Cosmology: Diffuse Radiation- - Galaxies: Active - Surveys - X-Rays

VizieR on-line data: <Available at CDS (J/AJ/123/2223): table1.dat table2.dat table3.dat>

Nomenclature: Table 1: [STS2002] NNN N=153 among (Nos 1-213).

Simbad objects: 161

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Number of rows : 161
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 Chandra Deep Field-South reg 03 32 28.0 -27 48 30           ~ 2282 1
2 NAME Lynx reg 08 47 +44.6           ~ 67 0
3 [STS2002] 119 X 08 48 03.06 +44 53 28.9           ~ 1 0
4 SDSS J084809.94+444902.3 SyG 08 48 09.9466094376 +44 49 02.423297460   21.22 21.06     ~ 16 0
5 [STS2002] 89 X 08 48 10.56 +44 48 16.6           ~ 1 0
6 CXOSEXSI J084811.7+445302 X 08 48 11.77 +44 53 03.3       23.460   ~ 5 0
7 [STS2002] 75 X 08 48 12.02 +44 49 15.9           ~ 1 0
8 SDSS J084812.46+445657.4 QSO 08 48 12.4586882328 +44 56 57.449323752           ~ 19 0
9 SDSS J084818.54+444845.7 EmG 08 48 18.54948 +44 48 45.7881       20.660   ~ 6 0
10 [STS2002] 208 X 08 48 20.59 +44 57 14.6           ~ 1 0
11 CXOSEXSI J084820.8+445648 X 08 48 20.87 +44 56 49.3           ~ 4 0
12 [STS2002] 71 X 08 48 22.25 +44 56 27.8           ~ 1 0
13 CXOSEXSI J084822.2+445223 Sy1 08 48 22.3 +44 52 25       23.320   ~ 6 0
14 CXOSEXSI J084822.5+445854 Sy2 08 48 22.6 +44 58 55       21.080   ~ 5 0
15 SDSS J084822.71+444958.1 QSO 08 48 22.7231121168 +44 49 58.150167276           ~ 6 0
16 CXOSEXSI J084823.9+445852 Sy1 08 48 24.0 +44 58 53       22.010   ~ 5 0
17 [STS2002] 66 EmG 08 48 24.62 +44 57 40.0           ~ 1 0
18 [STS2002] 65 EmG 08 48 24.65 +44 53 54.4           ~ 1 0
19 [STS2002] 92 X 08 48 24.96 +45 02 51.9           ~ 1 0
20 SDSS J084825.26+444809.7 QSO 08 48 25.2659601480 +44 48 09.732435912       20.730   ~ 17 0
21 SDSS J084827.35+445434.7 QSO 08 48 27.3474879480 +44 54 34.679845980   20.78 20.35 20.330   ~ 19 0
22 CXOSEXSI J084827.4+445604 EmG 08 48 27.51 +44 56 06.0       23.670   ~ 5 0
23 CXOSEXSI J084830.2+445604 X 08 48 30.23 +44 56 06.0       24.400   ~ 5 0
24 [STS2002] 118 X 08 48 31.19 +44 51 59.6           ~ 1 0
25 [STS2002] 139 * 08 48 31.49 +44 56 34.2           M4V 1 0
26 [STS2002] 122 X 08 48 31.55 +44 53 43.0           ~ 1 0
27 [STS2002] 167 G 08 48 31.64 +44 59 09.0           ~ 1 0
28 [STS2002] 60 EmG 08 48 31.72 +44 54 42.9       25.420   ~ 8 0
29 [STS2002] 164 G 08 48 32.74 +44 57 10.8           ~ 1 0
30 [STS2002] 90 X 08 48 33.04 +44 48 12.9           ~ 1 0
31 [STS2002] 124 X 08 48 33.56 +44 54 08.8           ~ 1 0
32 [STS2002] 59 X 08 48 34.25 +44 49 38.1           ~ 1 0
33 [STS2002] 58 X 08 48 34.71 +44 49 48.4           ~ 1 0
34 ClG J0848+4453 ClG 08 48 34.800 +44 53 41.90           ~ 124 1
35 [STS2002] 207 X 08 48 35.12 +44 57 57.1           ~ 1 0
36 [STS2002] 57 AGN 08 48 36.29 +44 52 50.6     24.33     ~ 3 0
37 [STS2002] 56 X 08 48 36.49 +45 01 42.1           ~ 1 0
38 [STS2002] 116 X 08 48 36.95 +44 51 32.6           ~ 1 0
39 [STS2002] 135 X 08 48 37.03 +44 56 04.7           ~ 1 0
40 SDSS J084837.07+444819.6 Sy1 08 48 37.0838048160 +44 48 19.664536212       20.670   ~ 24 0
41 2XMM J084837.6+445712 Sy1 08 48 37.626 +44 57 12.19     23.060     ~ 9 0
42 [STS2002] 53 X 08 48 37.75 +44 57 44.7           ~ 1 0
43 [STS2002] 52 AGN 08 48 38.0 +44 53 53       24.220   ~ 32 0
44 [STS2002] 109 X 08 48 40.14 +44 50 07.2           ~ 1 0
45 [STS2002] 136 X 08 48 40.15 +44 56 05.4           ~ 1 0
46 CXOSEXSI J084840.2+444844 X 08 48 40.28 +44 48 44.9           ~ 2 0
47 [STS2002] 127 X 08 48 40.31 +44 54 55.3           ~ 1 0
48 SDSS J084840.40+445801.0 Sy1 08 48 40.406 +44 58 01.01       21.230   ~ 8 0
49 [STS2002] 117 X 08 48 40.60 +44 51 36.5           ~ 1 0
50 [VV2006] J084840.6+445732 QSO 08 48 40.6380953184 +44 57 33.043394268     20.34 20.460   ~ 15 0
51 CXOSEXSI J084843.2+445806 AGN 08 48 43.25 +44 58 07.2       21.540   ~ 6 0
52 [STS2002] 105 X 08 48 43.96 +44 49 49.7           ~ 1 0
53 [STS2002] 205 X 08 48 44.57 +44 52 54.4           ~ 1 0
54 [STS2002] 49 EmG 08 48 45.17 +44 54 53.0           ~ 1 0
55 CXOSEXSI J084845.4+445651 EmG 08 48 45.45 +44 56 52.8       24.930   ~ 5 0
56 [STS2002] 150 X 08 48 45.93 +44 46 40.6           ~ 1 0
57 [STS2002] 48 AGN 08 48 46.11 +44 59 46.3       21.450   ~ 7 0
58 CXOSEXSI J084846.4+444830 EmG 08 48 46.46 +44 48 32.0       20.550   ~ 5 0
59 CXOSEXSI J084846.5+445358 EmG 08 48 46.61 +44 53 59.8       24.400   ~ 5 0
60 ClG J0848+4456 ClG 08 48 46.9 +44 56 22           ~ 62 1
61 [STS2002] 143 X 08 48 48.25 +44 58 20.3           ~ 1 0
62 [STS2002] 101 X 08 48 49.06 +45 00 21.6           ~ 1 0
63 [STS2002] 45 X 08 48 52.36 +44 57 45.1           ~ 1 0
64 [STS2002] 201 X 08 48 52.54 +44 45 53.2           ~ 1 0
65 CXOSEXSI J084853.8+445351 EmG 08 48 53.85 +44 53 52.7       21.680   ~ 5 0
66 CXOMP J084854.0+450230 * 08 48 54.1061149896 +45 02 31.343527068           ~ 3 0
67 SDSS J084854.47+445150.0 Sy1 08 48 54.469 +44 51 50.08   21.43 20.93 20.570   ~ 20 0
68 [STS2002] 155 EmG 08 48 55.3 +44 50 11       22.740   ~ 6 0
69 CXOMP J084856.7+445225 Sy1 08 48 56.7 +44 52 26     23.38 22.040   ~ 8 0
70 EES 82 EmG 08 48 57.73 +44 56 09.5       22.300   ~ 8 0
71 [STS2002] 104 X 08 48 57.83 +44 49 19.6           ~ 1 0
72 2XMM J084858.0+445435 Sy1 08 48 58.1403325488 +44 54 35.233593876   20.67 20.30 19.580   ~ 24 0
73 [STS2002] 165 X 08 48 58.64 +44 57 50.9           ~ 1 0
74 [STS2002] 38 X 08 48 58.7 +44 50 36           ~ 2 0
75 [STS2002] 99 X 08 48 58.77 +45 00 35.9           ~ 1 0
76 ClG J0849+4452 ClG 08 48 58.8 +44 51 53           ~ 107 1
77 [RLT2017] ClJ0849 2 AGN 08 48 58.80 +44 56 21.8           ~ 3 0
78 SDSS J084858.96+445514.9 G 08 48 58.96189 +44 55 14.9590           ~ 3 0
79 [STS2002] 146 X 08 49 00.15 +44 58 50.4           ~ 1 0
80 [STS2002] 37 X 08 49 00.48 +44 47 01.9           ~ 1 0
81 [STS2002] 204 X 08 49 01.30 +44 53 38.0           ~ 1 0
82 SDSS J084902.27+450004.4 Sy2 08 49 02.275 +45 00 04.41       19.620   ~ 10 0
83 [STS2002] 125 X 08 49 02.30 +44 54 21.3           ~ 1 0
84 CXOSEXSI J084902.4+445705 Sy1 08 49 02.5 +44 57 06       22.570   ~ 6 0
85 SDSS J084902.55+450039.8 Sy1 08 49 02.542 +45 00 39.84       20.230   ~ 16 0
86 CXOMP J084904.0+445024 AGN 08 49 04.0 +44 50 25       23.920   ~ 8 0
87 CXOSEXSI J084904.0+445646 AGN 08 49 04.10 +44 56 47.3       25.120   ~ 6 0
88 [STS2002] 153 X 08 49 04.27 +44 49 39.4           ~ 1 0
89 [STS2002] 98 X 08 49 04.42 +45 00 38.0           ~ 1 0
90 [STS2002] 211 X 08 49 04.57 +44 53 36.7           ~ 1 0
91 2XMM J084904.6+445321 G 08 49 04.617 +44 53 21.47           ~ 7 0
92 [VV2006] J084905.1+445715 QSO 08 49 05.0720835432 +44 57 14.726399724   20.79 20.38 19.540   ~ 44 0
93 CXOMP J084905.2+445202 AGN 08 49 05.32 +44 52 03.7       24.610   ~ 11 0
94 [STS2002] 96 X 08 49 05.45 +45 00 57.1           ~ 1 0
95 [STS2002] 157 X 08 49 06.0 +44 50 38       23.990   ~ 6 0
96 [STS2002] 114 X 08 49 06.0 +44 51 27           ~ 2 0
97 CXOSEXSI J084906.3+450107 Sy1 08 49 06.4 +45 01 09       21.980   ~ 6 0
98 [STS2002] 213 X 08 49 06.41 +45 02 15.6           ~ 1 0
99 [STS2002] 94 X 08 49 06.98 +45 01 31.6           ~ 1 0
100 [STS2002] 28 X 08 49 07.17 +44 48 57.8           ~ 1 0
101 CXOSEXSI J084907.2+445813 Sy1 08 49 07.2 +44 58 15       22.590   ~ 6 0
102 CXOSEXSI J084907.5+450151 EmG 08 49 07.54 +45 01 52.3       22.360   ~ 5 0
103 [STS2002] 210 X 08 49 07.62 +44 53 48.7           ~ 1 0
104 CXOSEXSI J084908.2+445810 Sy1 08 49 08.3 +44 58 10       23.970   ~ 6 0
105 [STS2002] 24 EmG 08 49 08.66 +44 58 43.3       25.160   ~ 6 0
106 [STS2002] 23 X 08 49 09.12 +45 00 25.0           ~ 1 0
107 [STS2002] 200 X 08 49 09.65 +45 00 30.7           ~ 1 0
108 [STS2002] 212 X 08 49 09.73 +44 53 31.1           ~ 1 0
109 [STS2002] 206 X 08 49 09.84 +45 00 36.8           ~ 1 0
110 CXOSEXSI J084911.3+445008 Sy1 08 49 11.4 +44 50 08       23.280   ~ 6 0
111 [STS2002] 130 X 08 49 11.40 +44 55 28.0           ~ 1 0
112 [VV2006] J084911.4+444454 QSO 08 49 11.4981902064 +44 44 53.559056328   21.02 20.32     ~ 17 0
113 [STS2002] 21 X 08 49 11.60 +45 02 02.0           ~ 1 0
114 [STS2002] 84 X 08 49 13.11 +44 46 59.4           ~ 1 0
115 [STS2002] 110 X 08 49 13.62 +44 50 07.1           ~ 1 0
116 CXOMP J084913.8+444758 * 08 49 13.6594787040 +44 47 56.936529888           M0 3 0
117 CXOSEXSI J084913.6+445238 EmG 08 49 13.67 +44 52 39.1       24.060   ~ 5 0
118 [STS2002] 20 X 08 49 14.33 +44 50 54.8           ~ 1 0
119 [STS2002] 81 X 08 49 14.62 +44 46 32.0           ~ 1 0
120 [STS2002] 19 X 08 49 14.69 +44 52 29.9           ~ 1 0
121 [STS2002] 120 X 08 49 16.05 +44 53 36.2           ~ 1 0
122 CXOSEXSI J084916.2+445954 X 08 49 16.23 +44 59 55.6       25.620   ~ 5 0
123 [STS2002] 126 X 08 49 17.35 +44 54 27.3           ~ 1 0
124 [STS2002] 152 EmG 08 49 18.05 +45 01 15.2       23.250   ~ 5 0
125 [STS2002] 17 X 08 49 18.69 +44 53 33.3           ~ 1 0
126 CXOSEXSI J084919.5+445707 EmG 08 49 19.57 +44 57 08.1           ~ 5 0
127 [STS2002] 86 X 08 49 20.87 +44 47 27.2           ~ 1 0
128 [STS2002] 160 X 08 49 21.25 +44 52 58.1           ~ 1 0
129 [STS2002] 106 X 08 49 21.31 +44 49 48.1           ~ 2 0
130 [STS2002] 82 X 08 49 21.97 +44 46 54.1           ~ 1 0
131 2XMM J084922.4+445356 QSO 08 49 22.534 +44 53 56.86       18.880   ~ 7 0
132 SDSS J084923.24+445250.3 QSO 08 49 23.2505103288 +44 52 50.342678004       19.200   ~ 12 0
133 [STS2002] 154 X 08 49 25.18 +44 50 02.4           ~ 1 0
134 SDSS J084925.27+444821.0 G 08 49 25.27270 +44 48 21.0358           ~ 4 0
135 [STS2002] 203 X 08 49 26.21 +44 59 02.3           ~ 1 0
136 [STS2002] 137 X 08 49 27.34 +44 56 21.3           ~ 1 0
137 SDSS J084927.74+445457.9 Sy1 08 49 27.74203 +44 54 57.9203       20.760   ~ 31 0
138 [STS2002] 85 X 08 49 28.44 +44 47 16.0           ~ 1 0
139 [STS2002] 11 X 08 49 29.52 +45 01 27.5           ~ 1 0
140 CXOSEXSI J084930.4+445224 EmG 08 49 30.49 +44 52 25.6       22.340   ~ 4 0
141 [STS2002] 9 X 08 49 30.69 +44 58 37.9           ~ 1 0
142 [STS2002] 95 X 08 49 31.20 +45 01 05.1           ~ 1 0
143 [STS2002] 8 X 08 49 31.25 +44 59 52.0           ~ 1 0
144 CXOSEXSI J084931.3+445549 AGN 08 49 31.38 +44 55 50.5       21.200   ~ 5 0
145 [STS2002] 121 X 08 49 32.04 +44 53 35.1           ~ 1 0
146 [STS2002] 6 X 08 49 33.15 +45 00 46.9           ~ 1 0
147 [STS2002] 129 X 08 49 34.25 +44 55 26.6           ~ 1 0
148 CXOSEXSI J084934.6+445448 EmG 08 49 34.69 +44 54 49.6       22.180   ~ 4 0
149 [STS2002] 202 X 08 49 37.13 +44 59 19.8           ~ 1 0
150 [STS2002] 209 X 08 49 37.91 +44 53 55.1           ~ 1 0
151 [STS2002] 140 X 08 49 39.40 +44 56 40.6           ~ 1 0
152 [STS2002] 5 X 08 49 39.75 +44 54 11.0           ~ 1 0
153 [STS2002] 4 X 08 49 40.05 +44 58 17.6           ~ 1 0
154 [STS2002] 3 X 08 49 41.81 +44 58 07.5           ~ 1 0
155 [STS2002] 2 X 08 49 42.51 +44 59 06.2           ~ 1 0
156 US 1728 Sy1 08 49 43.7075568144 +45 00 24.223571172   19.02 18.69     ~ 49 0
157 HD 75117 PM* 08 49 44.6255934960 +44 58 40.037835540   8.46 7.97     G0 30 0
158 [STS2002] 149 X 08 49 45.35 +44 59 21.1           ~ 1 0
159 NAME Lockman Hole reg 10 45 00.0 +58 00 00           ~ 910 0
160 NAME Hubble Deep Field reg 12 36 49.5 +62 12 58           ~ 1967 1
161 SSA 13 reg 13 12 16.5 +42 44 39           ~ 110 0

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