2011A&A...526A..74M


C.D.S. - SIMBAD4 rel 1.7 - 2020.07.03CEST22:54:46

2011A&A...526A..74M - Astronomy and Astrophysics, volume 526A, 74-74 (2011/2-1)

Wide-field VLBA observations of the Chandra Deep Field South.

MIDDELBERG E., DELLER A., MORGAN J., ROTTMANN H., ALEF W., TINGAY S., NORRIS R., BACH U., BRISKEN W. and LENC E.

Abstract (from CDS):

Wide-field surveys are a commonly-used method for studying thousands of objects simultaneously, to investigate, e.g., the joint evolution of star-forming galaxies and active galactic nuclei. Very long baseline interferometry (VLBI) observations can yield valuable input for such studies because they are able to identify AGN unambiguously in the moderate-to-high-redshift Universe. However, VLBI observations of large swaths of the sky are impractical using standard methods, because the fields of view of VLBI observations are on the order of 10'' or less, and have therefore so far only played a minor role in galaxy evolution studies. We have embarked on a project to carry out Very Long Baseline Array (VLBA) observations of all 96 known radio sources in one of the best-studied areas in the sky, the Chandra deep field South (CDFS). The challenge was to develop methods that could significantly reduce the amount of observing (and post-processing) time, making such a project feasible. We developed an extension to the DiFX software correlator that allows one to efficiently correlate up to hundreds of positions within the primary beams of the interferometer antennas. This extension enabled us to target many sources simultaneously, at full resolution and high sensitivity, using only a small amount of observing time. The combination of wide fields-of-view and high sensitivity across the field in this survey is unprecedented. We observed a single pointing containing the CDFS with the VLBA, in which 96 radio sources were known from previous observations with the Australia Telescope Compact Array (ATCA). From our input sample of 96 sources, 20 were detected with the VLBA, and one more source was tentatively detected. The majority of these objects have flux densities in agreement with arcsec-scale observations, implying that their radio emission comes from very small regions. Two objects are visibly resolved. One VLBI-detected object had been classified earlier as a star-forming galaxy. After comparing the VLBI detections to sources found in sensitive, co-located X-ray observations, we find that X-ray detections are not a good indicator for VLBI detections. We have successfully demonstrated a new extension to the DiFX software correlator, allowing one to observe hundreds of fields of view simultaneously. In a sensitive observation of the CDFS we detect 21% of the sources and were able to reclassify 7 sources as AGN, which had not been identified as such before. Wide-field VLBI survey science is now coming of age.

Abstract Copyright:

Journal keyword(s): techniques: interferometric - galaxies: active - galaxies: evolution

Simbad objects: 104

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Number of rows : 104

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 SN 1986J SN* 02 22 31.33 +42 19 56.4   18.4 18.4     SNII 306 1
2 ATCDFS J033123.30-274905.6 G 03 31 23.31 -27 49 05.6       22.70   ~ 13 0
3 2XMM J033124.7-275208 AGN 03 31 24.89 -27 52 08.3       20.11   ~ 19 0
4 ATCDFS J033127.51-274440.1 G 03 31 27.57 -27 44 39.7 25.94 24.18 23.73 23.39 22.79 ~ 16 0
5 ATCDFS J033128.59-274934.9 G 03 31 28.59 -27 49 34.9       22.77   ~ 11 0
6 [DSS2017] 2096 EmG 03 31 30.053 -27 56 02.29   21.08   19.742   ~ 29 0
7 [DSS2017] 243 G 03 31 30.750 -27 57 34.66       23.86   ~ 14 0
8 ATCDFS J033138.47-275942.0 G 03 31 38.47 -27 59 42.0       25.52   ~ 15 0
9 [MBR2003] CDFS-H 692 G 03 31 39.55 -27 41 19.7 24.83 23.77 23.44 23.28 22.94 ~ 35 0
10 ATCDFS J033146.08-280027.2 Rad 03 31 46.08 -28 00 27.2       24.45   ~ 11 0
11 ATCDFS J033146.57-275734.8 G 03 31 46.57 -27 57 34.8       19.908   ~ 15 0
12 ATCDFS J033149.87-274838.8 AGN 03 31 49.88 -27 48 38.8           ~ 10 0
13 ATCDFS J033150.07-273947.1 Rad 03 31 50.08 -27 39 47.1       23.71   ~ 12 0
14 [AZW2014] 43 AGN 03 31 50.777 -27 47 03.35 24.70 23.80 23.65 23.53 23.22 ~ 24 0
15 [KFM2008] RID 56 AGN 03 31 52.13 -27 39 26.6       24.55   ~ 20 0
16 ATCDFS J033153.41-280221.1 Rad 03 31 53.41 -28 02 21.1       23.96   ~ 10 0
17 [LBX2017] 98 AGN 03 32 01.50394 -27 46 46.8793   25.08 24.62 23.821 23.02 ~ 38 0
18 ATCDFS J033202.83-275612.6 Rad 03 32 02.84 -27 56 12.6           ~ 11 0
19 GOODS J033203.87-275805.4 G 03 32 03.87374 -27 58 05.4239   25.91   24.98   ~ 12 0
20 2MASS J03320855-2746483 AGN 03 32 08.560 -27 46 48.37   21.478   19.224 18.955 ~ 52 0
21 [VV2006] J033208.7-274735 QSO 03 32 08.6732096291 -27 47 34.649025498 19.78 19.471 19.11 18.665 18.621 ~ 78 0
22 NAME CDFS-Cl1 AGN 03 32 09.704 -27 42 48.10   21.015   21.96 21.071 ~ 54 0
23 ATCDFS J033210.13-275936.8 Rad 03 32 10.13 -27 59 36.8       21.27   ~ 11 0
24 ATCDFS J033210.80-274629.2 AGN 03 32 10.77814 -27 46 27.7471   24.593 25.416 23.110 23.286 ~ 44 0
25 2XMM J033210.9-274415 Sy1 03 32 10.914 -27 44 14.96 23.35 22.500 22.882 22.50 22.371 ~ 71 0
26 ZFOURGE CDFS 29170 AGN 03 32 11.08313 -27 40 55.9304   19.776   20.488 19.522 ~ 29 0
27 [LBA2005] 321 QSO 03 32 11.65 -27 37 26.1   19.23 18.90 18.88   ~ 24 0
28 [NAA2006] S415 AGN 03 32 13.08 -27 43 51.0           ~ 20 0
29 [SWM2014] GOODS-S 41898 Sy2 03 32 13.232 -27 42 40.98   21.642 20.820 20.164 19.824 ~ 76 0
30 [SWM2014] GOODS-S 19545 AGN 03 32 14.1296 -27 49 10.065   24.61   24.44 24.109 ~ 20 0
31 ZFOURGE CDFS 555 G 03 32 14.81722 -27 56 40.4650   23.553   20.902   ~ 17 0
32 [CCC2011] 52 G 03 32 17.05 -27 58 46.5       24.59   ~ 13 0
33 [SWM2014] GOODS-S 24878 rG 03 32 18.0148 -27 47 18.549   21.268   20.132 19.560 ~ 56 0
34 [NAA2006] C458 AGN 03 32 19.16 -27 54 07.6           ~ 4 0
35 [AMK2006] 20 rG 03 32 19.5154 -27 52 17.693   25.2   23.70 22.80 ~ 20 0
36 [WDK2001] 60742 AGN 03 32 21.07 -27 35 29.7       22.14   ~ 14 0
37 [LBX2017] 381 EmG 03 32 21.282 -27 44 35.61   20.411 21.588 19.997 20.247 ~ 40 0
38 [SWM2014] GOODS-S 36189 AGN 03 32 22.585 -27 44 25.84   22.46 21.570 21.101 20.606 ~ 48 1
39 [CCC2011] 58 EmG 03 32 22.59 -28 00 23.6       17.47   ~ 13 0
40 [MBR2003] CDFS-H 344 G 03 32 23.6850181664 -27 36 48.608701103       18.797   ~ 16 0
41 2MASS J03322378-2758457 AGN 03 32 23.783 -27 58 45.77   19.476   18.761   ~ 18 0
42 ATCDFS J033226.82-280453.1 Rad 03 32 26.83 -28 04 53.1           ~ 6 0
43 [VV2006] J033227.0-274105 QSO 03 32 27.006 -27 41 05.12 19.93 19.363   19.003 19.116 ~ 75 0
44 NAME Chandra Deep Field-South reg 03 32 28.0 -27 48 30           ~ 1811 1
45 [SWM2014] GOODS-S 30152 AGN 03 32 28.7413 -27 46 20.394   24.32 23.36 22.37 21.357 ~ 48 0
46 [LBX2017] 529 AGN 03 32 28.817 -27 43 55.60   20.674 18.861 18.383 18.332 ~ 41 0
47 2MASX J03322988-2744244 EmG 03 32 29.858 -27 44 25.11 19.55 17.689 16.891 16.74 16.467 ~ 54 0
48 2dFGRS TGS243Z016 EmG 03 32 29.9857736009 -27 44 05.386004403 19.78 18.221 17.419 17.236 17.011 ~ 58 0
49 NAME Extended Chandra Deep Field South reg 03 32 30.0 -27 48 20           ~ 613 0
50 [HSN2014] 51795 AGN 03 32 30.547 -27 59 11.63   18.69   19.825   ~ 21 0
51 [NAA2006] S446 Rad 03 32 31.67 -28 04 35.6           ~ 16 0
52 ATCDFS J033232.04-280310.2 AGN 03 32 32.04 -28 03 10.2           ~ 5 0
53 [LBX2017] 623 AGN 03 32 33.436 -27 52 27.88   31.457 27.72   27.963 ~ 30 0
54 [SWM2014] GOODS-S 16960 rG 03 32 37.74 -27 50 00.3   24.914   23.95 23.640 ~ 16 0
55 [DSS2017] 2095 AGN 03 32 38.9186775383 -27 57 00.816169683   20.195 19.55 18.857 18.45 ~ 44 0
56 [NAA2006] S458 Rad 03 32 39.57 -28 03 12.5       24.00   ~ 6 0
57 ATCDFS J033241.60-280128.0 EmG 03 32 41.60 -28 01 28.0       23.13   ~ 14 0
58 [DAB2009] 92 Rad 03 32 41.81 -28 05 52.5           ~ 5 0
59 [MBR2003] CDFS-H 496 AGN 03 32 42.84115 -27 38 17.7335   21.477   20.606   ~ 6 0
60 2XMM J033244.0-275140 AGN 03 32 44.17 -27 51 42.5           ~ 5 0
61 ATCDFS J033245.36-280449.7 AGN 03 32 45.36 -28 04 49.7       24.17   ~ 9 0
62 LEDA 747555 AGN 03 32 45.96439 -27 57 45.3856 18.83 17.699 17.30 17.054 16.58 ~ 32 0
63 ATCDFS J033249.19-274050.7 AGN 03 32 49.21541 -27 40 50.3803   22.613 22.99 22.61 21.51 ~ 44 0
64 [DAB2009] IR 53.20553-27.97916 smm 03 32 49.33 -27 58 45.1       24.23   ~ 16 0
65 VCDFS 77856 G 03 32 49.43 -27 42 35.3       23.86 22.448 ~ 15 0
66 ATCDFS J033252.48-275942.1 Rad 03 32 52.48 -27 59 42.1           ~ 10 0
67 ATCDFS J033253.34-280200.1 Rad 03 32 53.34 -28 02 00.1       23.24   ~ 10 0
68 2MASX J03325649-2758482 AGN 03 32 56.492 -27 58 48.21       18.207   ~ 22 0
69 [LBA2005] 508 AGN 03 32 57.10 -28 02 10.3       20.37   ~ 18 0
70 ATCDFS J033259.22-274325.6 EmG 03 32 59.22 -27 43 25.6       24.19   ~ 16 0
71 LESS J033302.5-275643 PaG 03 33 02.50 -27 56 43.6           ~ 19 0
72 ALESS J033302.69-275642.8 G 03 33 02.69 -27 56 42.8 25.67 24.78 24.65 24.39 24.08 ~ 24 0
73 ATCDFS J033303.29-275326.4 Rad 03 33 03.29 -27 53 26.4           ~ 10 0
74 ATCDFS J033304.38-273804.3 G 03 33 04.38 -27 38 04.3       23.58   ~ 10 0
75 [DSS2017] 1137 G 03 33 05.127 -27 40 27.43   21.48   20.230   ~ 23 0
76 LEDA 750493 GiC 03 33 07.24 -27 44 31.2       17.66   ~ 32 0
77 [SWM2014] GOODS-S 13986 AGN 03 33 08.17224 -27 50 33.2376   20.971 23.30 21.92 20.82 ~ 32 0
78 ATCDFS J033309.13-275846.7 G 03 33 09.14 -27 58 46.7           ~ 7 0
79 [DSS2017] 2111 G 03 33 09.74335 -27 48 01.0127   19.877 19.40 19.101 18.61 ~ 28 0
80 [LBX2017] 988 QSO 03 33 10.19650 -27 48 41.9486 24.27 23.866 23.14 22.97 22.00 ~ 44 0
81 [NAA2006] S506 Rad 03 33 11.49 -28 03 19.0           ~ 10 0
82 [LBA2005] 609 AGN 03 33 11.80 -27 41 38.2       23.96   ~ 18 0
83 [MBR2003] CDFS-H 3330 Rad 03 33 13.12 -27 49 30.2           ~ 11 0
84 [KFM2008] RID 238 Rad 03 33 14.98 -27 51 51.9       23.19   ~ 6 0
85 [KFM2008] J033316.3-274725 EmG 03 33 16.34 -27 47 25.0       22.94   ~ 14 0
86 [HSN2014] 66507 AGN 03 33 16.51610 -27 50 39.4670 21.25 19.64 19.11 18.60 18.02 ~ 35 0
87 [WDK2001] 16214 AGN 03 33 16.72 -27 56 30.4       21.11   ~ 14 0
88 ATCDFS J033316.75-280016.0 G 03 33 16.75 -28 00 16.0   26.25 25.66 25.53   ~ 16 0
89 ATCDFS J033316.95-274121.8 G 03 33 16.95 -27 41 21.8       18.03   ~ 18 0
90 [KFM2008] J033317.3-274948 smm 03 33 17.40 -27 49 48.5           ~ 11 0
91 [CCC2011] 115 smm 03 33 18.67 -27 49 40.0       23.98   ~ 11 0
92 ATCDFS J033321.32-274138.9 G 03 33 21.33 -27 41 38.9       23.40   ~ 17 0
93 [MBR2003] CDFS-H 2620 G 03 33 25.82 -27 43 42.4       20.59   ~ 12 0
94 ATCDFS J033327.55-275725.7 Rad 03 33 27.56 -27 57 25.7       25.11   ~ 10 0
95 ATCDFS J033333.03-274600.0 Rad 03 33 33.15 -27 46 01.9           ~ 7 0
96 [KFM2008] J033333.4-275332 Rad 03 33 33.41 -27 53 33.1           ~ 11 0
97 [NAA2006] S547 EmG 03 33 34.55 -27 47 50.3       22.91   ~ 19 0
98 SARS 052.87346-27.93083 GiC 03 33 35.26 -27 45 49.1           ~ 7 0
99 ATCDFS J033336.45-274354.3 G 03 33 36.46 -27 43 54.3       25.22   ~ 19 0
100 [NAA2006] S565 AGN 03 33 42.37 -27 47 36.8   23.56 22.92 22.95   ~ 10 0
101 QSO B0346-279 QSO 03 48 38.14457723 -27 49 13.5655526   20.08 18.63 17.72   ~ 142 1
102 ICRF J092703.0+390220 Sy1 09 27 03.0139516273 +39 02 20.847968628   17.17 17.00 16.486   ~ 932 1
103 IC 4553 SyG 15 34 57.22396 +23 30 11.6084   14.76 13.88     ~ 2679 4
104 3C 454.3 QSO 22 53 57.74798 +16 08 53.5611   16.57 16.10 15.22   ~ 2505 2

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2020.07.03-22:54:46

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