2011AJ....142..165T

Query : 2011AJ....142..165T

2011AJ....142..165T - Astron. J., 142, 165 (2011/November-0)

Optical spectra of candidate southern hemisphere international celestial reference frame (ICRF) radio sources.

TITOV O., JAUNCEY D.L., JOHNSTON H.M., HUNSTEAD R.W. and CHRISTENSEN L.

Abstract (from CDS):

We present the results of spectroscopic observations of the optical counterparts of 47 southern radio sources from the candidate International Celestial Reference Catalogue as part of a very long baseline interferometry (VLBI) program to strengthen the celestial reference frame, especially in the south. We made the observations with the 3.58 m European Southern Observatory New Technology Telescope. We obtained redshifts for 30 quasars and one radio galaxy, with a further seven objects being probable BL Lac objects with featureless spectra. Of the remainder, four were clear misidentifications with Galactic stars and five had low signal-to-noise spectra and could not be classified. These results, in combination with new VLBI data of the radio sources with redshifts more than 2, add significantly to the existing data needed to refine the distribution of source proper motions over the celestial sphere.

Abstract Copyright: ∼

Journal keyword(s): galaxies: distances and redshifts - quasars: emission lines - radio continuum: general - reference systems

Simbad objects: 47

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Number of rows : 47
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 ICRF J000517.9-164804 QSO 00 05 17.9339134128 -16 48 04.677538644   18.0   18.37   ~ 36 1
2 QSO B0008-300 QSO 00 10 45.1771466280 -29 45 13.183165332     18.48     ~ 21 1
3 ICRF J003124.3-392249 Bla 00 31 24.33147181 -39 22 49.3689611   20.8       ~ 17 1
4 QSO B0034-220 QSO 00 37 14.8262749944 -21 45 24.709587336     19.0     ~ 23 1
5 ICRF J005805.0-053952 QSO 00 58 05.06630963 -05 39 52.2781332   18.5       ~ 66 1
6 QSO B0107-610 QSO 01 09 15.47519907 -60 49 48.4601187     19.0 22.20   ~ 22 1
7 QSO B0110-668 QSO 01 12 18.9127514304 -66 34 45.190212672     18.0     ~ 31 1
8 QSO B0122-260 BLL 01 25 18.8374705440 -25 49 04.385957988     18.0     ~ 27 1
9 ICRF J022343.7-165637 QSO 02 23 43.7637362808 -16 56 37.699656720     19.5     ~ 39 1
10 ICRF J144553.3-162901 BLL 14 45 53.37630149 -16 29 01.6191263   20.5   20.09   ~ 70 1
11 QSO B1452-168 QSO 14 55 02.81065781 -17 00 13.9533285           ~ 30 1
12 QSO B1505-304 QSO 15 08 52.99316199 -30 36 29.4307813           ~ 15 1
13 ICRF J151440.0-474829 QSO 15 14 40.0243232304 -47 48 29.854709856           ~ 58 1
14 ICRF J153654.4-315115 BLL 15 36 54.49823071 -31 51 15.1348813     20.30 18.9   ~ 28 1
15 QSO B1635-14 QSO 16 38 45.2850424920 -14 15 50.238420984     18.0     ~ 36 1
16 QSO B1633-810 BLL 16 42 57.34556496 -81 08 35.0702204     18.0 17.40   ~ 39 1
17 ICRF J165039.5-294346 QSO 16 50 39.54413 -29 43 46.9548   19.01       ~ 41 1
18 ICRF J170336.5-621240 BLL 17 03 36.54121471 -62 12 40.0085591   18.73   17.58   ~ 111 1
19 ICRF J171017.2-035550 BLL 17 10 17.20537034 -03 55 50.1286949   21.5 20.5 18.7   ~ 34 1
20 4C -03.64 BLL 17 28 50.2351388016 -03 50 50.435948724           ~ 28 1
21 PMN J1751-2524 Rad 17 51 51.26253123 -25 24 00.0635706           ~ 91 1
22 QSO B1758-651 QSO 18 03 23.49665086 -65 07 36.7613089   18.18       ~ 67 1
23 ICRF J181945.3-552120 QSO 18 19 45.39951531 -55 21 20.7453837   19.19 16.0 21.50   ~ 70 1
24 PMN J1825-1718 Rad 18 25 36.532306 -17 18 49.84801           ~ 39 1
25 QSO B1852-534 QSO 18 57 00.4517958336 -53 25 00.382998900   18.5       ~ 29 1
26 ICRF J192559.6+210626 BLL 19 25 59.60535459 +21 06 26.1620257           ~ 212 1
27 QSO B1928-698 QSO 19 33 31.1611152144 -69 42 58.911275880   19.2       ~ 24 1
28 QSO B1936-623 QSO 19 41 21.76858343 -62 11 21.0567014   22.5       ~ 81 1
29 QSO B2012-017 BLL 20 15 15.1579835136 -01 37 32.554493544 18.08 17.86 17.61 16.5   ~ 105 1
30 ICRF J205625.0-320847 BLL 20 56 25.07022954 -32 08 47.8002638   20.5   17.60   ~ 34 1
31 QSO B2059-786 QSO 21 05 44.96140361 -78 25 34.5469664   21.59 21 20.20   ~ 43 1
32 ICRF J211000.9-102057 Bla 21 10 00.97897052 -10 20 57.3189376       18.14   ~ 64 1
33 ICRF J212104.0-611124 QSO 21 21 04.0742883264 -61 11 24.624945384           ~ 22 1
34 ICRF J213841.9-181044 QSO 21 38 41.92671874 -18 10 44.3766769     19.0     ~ 22 1
35 ICRF J220054.8-163232 QSO 22 00 54.87889733 -16 32 32.7026080           ~ 25 1
36 PKS 2211-388 rG 22 14 38.56966 -38 35 45.0098           ~ 34 1
37 ICRF J222341.1-160705 Bla 22 23 41.17274071 -16 07 05.1737332           ~ 21 1
38 ICRF J223718.3-250632 QSO 22 37 18.35550226 -25 06 32.5177961     19.0     ~ 19 1
39 ICRF J223912.0-570100 QSO 22 39 12.07589936 -57 01 00.8395331       21.00   ~ 53 1
40 ICRF J224307.8-625057 QSO 22 43 07.8389618472 -62 50 57.325581168           ~ 16 1
41 QSO B2254-204 BLL 22 56 41.2074627672 -20 11 40.512113340   19.04 18.5 18.18   ~ 98 1
42 AT20G J230305-303011 Q? 23 03 05.82082499 -30 30 11.4734219     16     ~ 22 1
43 ICRF J232118.2-082721 Bla 23 21 18.25024589 -08 27 21.5216915           ~ 41 1
44 ICRF J232339.1-061759 QSO 23 23 39.11376282 -06 17 59.2393982           ~ 25 1
45 QSO B2327-459 QSO 23 30 37.6811859048 -45 39 58.109646492   19.0       ~ 28 1
46 QSO B2344-514 QSO 23 47 19.86408334 -51 10 36.0653515   20.1   21.31   ~ 29 1
47 ICRF J235723.8-245103 QSO 23 57 23.8511320392 -24 51 03.159219348     19.5     ~ 26 1

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