2001A&A...367..719C


C.D.S. - SIMBAD4 rel 1.7 - 2020.07.04CEST21:47:48

2001A&A...367..719C - Astronomy and Astrophysics, volume 367, 719-724 (2001/2-4)

CCD astrometry of faint compact extragalactic radio sources. II.

COSTA E.

Abstract (from CDS):

Optical positions relative to the Hipparcos Catalogue (ESA 1997, Cat. I/239 have been obtained for the optical counterparts of 28 faint (B∼20-23) southern compact extragalactic radio sources (CERS). Most of these sources are not adequately observable (or simply not visible) by means of direct photography with a conventional wide-field telescope, so the positions were determined using a multi-step procedure involving CCD and photographic observations. This method responds both to the need of attaining small positional errors and the need to refer the positions to a standard astrometric system. Estimated precisions as good as 60 mas were achieved. For 13 of the above objects, namely 0214-522, 0614-349, 0700-465, 0823-500, 1120-274, 1143-331, 1347-218, 1349+027, 1817-254, 1829-718, 1920-211, 2139+028 and 2211-388, we are proposing a new optical identification. A comparison with VLBI radio positions available for these sources is presented. The residuals obtained are in most cases consistent with the precision of our optical data, and provide an evaluation of these faint objects as possible radio/optical frame link sources (or their identification as astrophysically interesting astrometric outliers). Fifteen of the CERS observed are either defining or candidate fiducial objects of the present realization of the International Celestial Reference System (ICRS, Ma et al., 1998AJ....116..516M), so the optical data we have obtained for them is potentially useful to help mantain and possibly improve the current link of the Hipparcos reference frame to the ICRS.

Abstract Copyright:

Journal keyword(s): astrometry - reference systems

Simbad objects: 32

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Number of rows : 32

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 PKS 0008-42 Rad 00 10 52.51972 -41 53 10.7911   22.0       ~ 64 1
2 ICRF J013305.7-520003 Sy1 01 33 05.7626207272 -52 00 03.950447146   18.68 20.3 18.63   ~ 81 0
3 ICRF J021603.1-520012 AGN 02 16 03.19777212 -52 00 12.4763135           ~ 18 1
4 NVSS J033717+013722 Rad 03 37 17.10809226 +01 37 22.7494775           ~ 10 1
5 QSO B0400-319 QSO 04 02 21.26601027 -31 47 25.9453862   20.2   20.75   ~ 79 1
6 QSO B0414-341 Q? 04 16 10.0509178521 -34 03 03.949626439   20.6       ~ 13 1
7 QSO B0537-286 QSO 05 39 54.28147645 -28 39 55.9478122   19.70 20.0 18.789   ~ 240 2
8 ICRF J061635.9-345616 PaG 06 16 35.98056063 -34 56 16.5584624   19.98 18.0     ~ 52 1
9 [VV2006] J070134.6-463436 QSO 07 01 34.5454295555 -46 34 36.626145667   18.82 19.5 19.44   ~ 60 1
10 ICRF J082526.8-501038 QSO 08 25 26.86900 -50 10 38.4877   20.94       ~ 107 1
11 LEDA 2825560 AGN 08 37 11.1 -19 51 56     19.6     ~ 48 1
12 QSO B1015-314 QSO 10 18 09.2600495231 -31 44 13.997657610   21 20.4     ~ 62 1
13 QSO B1057-797 BLL 10 58 43.30977041 -80 03 54.1597166   19.08   17.31   ~ 153 0
14 PKS 1110-217 rG 11 12 49.84868073 -21 58 29.3513484   24.41       ~ 28 1
15 ICRF J112256.4-274248 G 11 22 56.41008377 -27 42 48.4593259           ~ 18 0
16 ICRF J113130.5-050019 QSO 11 31 30.51674 -05 00 19.6573   20.0   19.20   ~ 62 1
17 QSO B1134-739 QSO 11 36 09.6524352957 -74 15 45.235180294   21.5       ~ 34 1
18 QSO B1142-225 QSO 11 45 22.04679845 -22 50 31.3430261     21.00 20.1   ~ 33 1
19 ICRF J114628.4-332842 BLL 11 46 28.4541495697 -33 28 42.603571669   18.5       ~ 20 1
20 4C 04.42 QSO 12 22 22.54962080 +04 13 15.7761797   17.88 17.98 17.06   ~ 248 1
21 QSO B1250-330 QSO 12 52 58.39734731 -33 19 59.5605387   21.4   19.08   ~ 30 1
22 ICRF J135014.0-220441 AGN 13 50 14.09008064 -22 04 41.0775377           ~ 27 1
23 DW 1349+02 AGN 13 52 30.7 +02 32 47     19     ~ 25 1
24 QSO B1406-267 QSO 14 09 50.16977926 -26 57 36.9798902   21.94   20.51   ~ 50 1
25 ICRF J165103.6+012923 BLL 16 51 03.66237140 +01 29 23.4588952   22.7 21.2 20.50   ~ 63 1
26 QSO J1820-2528 QSO 18 20 57.84869182 -25 28 12.5836842   18.56       ~ 79 0
27 [VV2006] J192332.2-210433 QSO 19 23 32.18981466 -21 04 33.3330547   15.32 17.50 16.70   ~ 125 2
28 QSO B1936-623 QSO 19 41 21.76860913 -62 11 21.0559897   22.5       ~ 50 1
29 QSO B2036-577 QSO 20 40 01.1017 -57 35 09.653   22.0       ~ 16 1
30 4C 02.53 Rad 21 42 11.411 +03 02 28.80           ~ 14 0
31 PKS 2211-388 Rad 22 14 38.56966 -38 35 45.0098           ~ 24 1
32 QSO B2329-16 BLL 23 31 38.65244503 -15 56 57.0096852   20.72   20.65   ~ 115 1

    Equat.    Gal    SGal    Ecl

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2020.07.04-21:47:48

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