2005A&A...437..805M


C.D.S. - SIMBAD4 rel 1.7 - 2021.03.08CET20:46:55

2005A&A...437..805M - Astronomy and Astrophysics, volume 437, 805-821 (2005/7-3)

The Chandra Deep Field South/GOODS survey. Optically faint X-ray sources.

MAINIERI V., ROSATI P., TOZZI P., BERGERON J., GILLI R., HASINGER G., NONINO M., LEHMANN I., ALEXANDER D.M., IDZI R., KOEKEMOER A.M., NORMAN C., SZOKOLY G. and ZHENG W.

Abstract (from CDS):

We provide important new constraints on the nature and redshift distribution of optically faint (R≥25) X-ray sources in the Chandra Deep Field South Survey. We use a large multi-wavelength data set, including the GOODS/ACS survey, the recently released Hubble Ultra Deep Field (UDF) data, and the new public VLT/ISAAC imaging. We show that we can derive accurate photometric redshifts for the spectroscopically unidentified sources thus maximizing the redshift completeness for the whole X-ray sample. Our new redshift distribution for the X-ray source population is in better agreement with that predicted by X-ray background synthesis models; however, we still find an overdensity of low redshift (z<1) sources. The optically faint sources are mainly X-ray absorbed AGN, as determined from direct X-ray spectral analysis and other diagnostics. Many of these optically faint sources have high (>10) X-ray-to-optical flux ratios. We also find that ∼71% of them are well fitted with the SED of an early-type galaxy with <zphot≳1.9 and the remaining 29% with irregular or starburst galaxies mainly at zphot>3. We estimate that 15 % of the optically faint sources are X-ray absorbed QSOs. The overall population of X-ray absorbed QSOs contributes a ∼11% fraction of the [2-10]keV X-ray Background (XRB) whereas current XRB synthesis models predict a ∼38 % contribution.

Abstract Copyright:

Journal keyword(s): surveys - galaxies: active - galaxies: quasars: general - cosmology: diffuse radiation - X-ray: galaxies - X-rays: general

Nomenclature: Fig.13: [MRT2005] NNNA (Nos 79A-79B, 605A-605C).

Simbad objects: 60

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Number of rows : 60

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 CXOCDFS J033202.6-274430 AGN 03 32 02.556 -27 44 29.76   27.98 26.97   26.684 ~ 27 0
2 CXOCDFS J033202.6-274525 AGN 03 32 02.6009 -27 45 24.466   27.148   26.37 25.350 ~ 14 0
3 CANDELS UDS F160W J033203.04-274450.1 QSO 03 32 03.036 -27 44 50.07   26.9484   25.45 25.0739 ~ 39 0
4 [LBX2017] 127 AGN 03 32 04.4238 -27 46 43.220   27.3041   24.4 27.0050 ~ 23 0
5 [SWM2014] GOODS-S 28908 AGN 03 32 05.3468 -27 46 44.100   27.9053     25.816 ~ 38 0
6 [SWM2014] GOODS-S 35536 AGN 03 32 05.766 -27 44 46.92   26.3906   25.72 25.283 ~ 29 0
7 CXOCDFS J033208.5-274047 AGN 03 32 08.383 -27 40 46.75   28.32 27.71   25.87 ~ 31 0
8 CXOCDFS J033208.9-274425 AGN 03 32 08.908 -27 44 24.74   28.81 28.03   26.950 ~ 25 0
9 CXOCDFS J033209.5-274758 X 03 32 09.47 -27 47 58.9           ~ 8 0
10 CXOCDFS J033209.9-275016 AGN 03 32 09.86 -27 50 16.1   30.071 28.16   28.428 ~ 28 0
11 [SWM2014] GOODS-S 29954 AGN 03 32 11.7717 -27 46 28.186   26.64   26.27 25.531 ~ 43 0
12 [SWM2014] GOODS-S 16888 AGN 03 32 13.889 -27 50 00.43   26.72 26.71 26.13 25.630 ~ 28 0
13 CXOCDFS J033213.9-275034 X 03 32 13.89 -27 50 34.8           ~ 6 0
14 [LBX2017] 260 Sy2 03 32 14.60129 -27 54 20.6665   25.65   25.47   ~ 31 0
15 CXOCDFS J033214.8-274403 AGN 03 32 14.790 -27 44 02.50   26.0747 25.86 25.870 25.2740 ~ 28 0
16 ZFOURGE CDFS 9374 AGN 03 32 14.9569 -27 51 04.525           ~ 13 0
17 [LBX2017] 297 AGN 03 32 16.7050 -27 46 38.151   27.1595   26.45 26.2133 ~ 16 0
18 CXOCDFS J033218.9-275136 QSO 03 32 18.8321 -27 51 35.476   25.15   24.51 25.128 ~ 69 0
19 ZFOURGE CDFS 7732 AGN 03 32 19.836 -27 51 59.44   28.20 27.67   25.82 ~ 19 0
20 [LBA2005] 356 AGN 03 32 19.950 -27 42 43.19   28.0511 26.18 25.4 27.1838 ~ 30 0
21 [GZW2002] Main 133 AGN 03 32 20.357 -27 42 29.02   28.56 28.86   25.82 ~ 26 0
22 CXOCDFS J033222.2-274812 AGN 03 32 22.1351 -27 48 11.316   27.9990 28.91   26.106 ~ 32 0
23 CXOCDFS J033222.5-274544 AGN 03 32 22.4518 -27 45 43.892   28.2293     26.765 ~ 18 0
24 [LBX2017] 443 Sy2 03 32 24.9576 -27 50 08.048   25.7039   25.08 24.202 ~ 30 0
25 CANDELS UDS F160W J033225.68-274305.6 Sy2 03 32 25.683 -27 43 05.61   26.617 25.773 26.13 25.3679 ~ 60 0
26 CXOCDFS J033225.9-275121 AGN 03 32 25.810 -27 51 20.32   28.60 27.77   26.872 ~ 24 0
27 CANDELS UDS F160W J033225.95-274514.3 AGN 03 32 25.9457 -27 45 14.347   27.8578   26.040 25.8074 ~ 30 0
28 [LBX2017] 490 AGN 03 32 26.7783 -27 46 03.991   28.9513     27.239 ~ 36 0
29 NAME Chandra Deep Field-South reg 03 32 28.0 -27 48 30           ~ 1859 1
30 ALESS J033229.29-275619.7 QSO 03 32 29.2912 -27 56 19.465     26.76 25.82 25.1655 ~ 102 0
31 CXOCDFS J033229.9-275329 AGN 03 32 29.7841 -27 53 28.369   27.24   26.66 27.0326 ~ 27 0
32 CXOCDFS J033232.2-274652 AGN 03 32 32.170 -27 46 51.49   28.3350 27.2830   26.411 ~ 42 0
33 CXOCDFS J033233.2-275206 AGN 03 32 33.113 -27 52 05.47   28.63 28.82   28.550 ~ 27 0
34 CXOCDFS J033233.4-274236 AGN 03 32 33.285 -27 42 36.01   27.6501 27.187   25.5120 ~ 39 0
35 CXOCDFS J033234.1-274900 AGN 03 32 33.996 -27 48 59.58   27.679 27.06 26.060 26.594 ~ 26 0
36 CXOCDFS J033234.7-274040 X 03 32 34.70 -27 40 40.3           ~ 6 0
37 [SWM2014] GOODS-S 5001 AGN 03 32 35.2075 -27 53 18.019   27.5835     26.282 ~ 33 0
38 CXOCDFS J033238.0-275309 AGN 03 32 37.95842 -27 53 07.9249   25.84   25.40 25.095 ~ 22 0
39 CXOCDFS J033238.1-274401 AGN 03 32 38.003 -27 44 00.69   28.60 27.92   27.023 ~ 33 0
40 CXOCDFS J033238.1-274627 AGN 03 32 38.029 -27 46 26.31 28.2222 28.4300 27.60 27.04 26.106 ~ 55 1
41 CXOCDFS J033238.4-275554 AGN 03 32 38.3134 -27 55 53.147   27.6521   27.42 25.8797 ~ 27 0
42 CXOCDFS J033238.8-275122 AGN 03 32 38.7610 -27 51 21.621   27.7247   27.02 26.1466 ~ 34 0
43 GOODS-MUSIC 13418 AGN 03 32 38.9 -27 44 39   25.544 25.322 24.340   ~ 9 1
44 NAME Hubble Ultra Deep Field reg 03 32 39.0 -27 47 29           ~ 1343 0
45 CXOCDFS J033239.1-274440 AGN 03 32 39.052 -27 44 39.32   27.8340     26.304 ~ 38 1
46 CXOCDFS J033239.2-274833 AGN 03 32 39.173 -27 48 32.35   28.180   26.63 26.045 ~ 52 1
47 CXOCDFS J033246.4-274632 AGN 03 32 46.3446 -27 46 32.011   26.4203   25.140 24.485 ~ 42 0
48 CXOCDFS J033247.2-275335 QSO 03 32 47.0589 -27 53 33.531   30.967   25.98 26.2117 ~ 32 0
49 [FPG2012] M3320 QSO 03 32 50.24688 -27 52 51.9384   26.5873 25.63   24.8575 ~ 37 0
50 CXOCDFS J033251.8-275214 AGN 03 32 51.644 -27 52 12.94   28.350 28.00   27.311 ~ 31 0
51 CXOCDFS J033253.5-275104 G 03 32 53.48 -27 51 04.7           ~ 7 0
52 CXOCDFS J033255.4-275105 AGN 03 32 55.35 -27 51 04.7           ~ 10 0
53 CXOCDFS J033259.2-275140 AGN 03 32 59.0119 -27 51 40.038   26.64 26.09 25.27 24.9165 ~ 22 0
54 NAME Chandra Deep Field-North reg 12 36.8 +62 13           ~ 621 0
55 NAME Hubble Deep Field reg 12 36 49.5 +62 12 58           ~ 1844 1
56 [MRT2005] 79B G ~ ~           ~ 1 1
57 [MRT2005] 605C G ~ ~           ~ 1 1
58 [MRT2005] 79A G ~ ~           ~ 1 1
59 [MRT2005] 605B G ~ ~           ~ 1 1
60 [MRT2005] 605A G ~ ~           ~ 1 1

    Equat.    Gal    SGal    Ecl

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2021.03.08-20:46:55

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