Optical Spectra of Candidate International Celestial Reference Frame (ICRF) Flat-spectrum Radio Sources. III.

O. Titov; T. Pursimo; Helen M. Johnston; Laura M. Stanford; Richard W. Hunstead; David L. Jauncey; Katrina A. Zenere

doi:10.3847/1538-3881/aa61fd

Optical Spectra of Candidate International Celestial Reference Frame (ICRF) Flat-spectrum Radio Sources. III.

O. Titov, T. Pursimo, Helen M. Johnston, Laura M. Stanford, Richard W. Hunstead, David L. Jauncey, Katrina A. Zenere

Research output: Contribution to journal › Article › peer-review

5 Citations (Scopus)

Abstract

In extending our spectroscopic program, which targets sources drawn from the International Celestial Reference Frame (ICRF) Catalog, we have obtained spectra for ∼160 compact, flat-spectrum radio sources and determined redshifts for 112 quasars and radio galaxies. A further 14 sources with featureless spectra have been classified as BL Lac objects. Spectra were obtained at three telescopes: the 3.58 m European Southern Observatory New Technology Telescope, and the two 8.2 m Gemini telescopes in Hawaii and Chile. While most of the sources are powerful quasars, a significant fraction of radio galaxies is also included from the list of non-defining ICRF radio sources.

Original language	English
Article number	157
Journal	Astronomical Journal
Volume	153
Issue number	4
DOIs	https://doi.org/10.3847/1538-3881/aa61fd
Publication status	Published - Apr 2017
Externally published	Yes

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title = "Optical Spectra of Candidate International Celestial Reference Frame (ICRF) Flat-spectrum Radio Sources. III.",

abstract = "In extending our spectroscopic program, which targets sources drawn from the International Celestial Reference Frame (ICRF) Catalog, we have obtained spectra for ∼160 compact, flat-spectrum radio sources and determined redshifts for 112 quasars and radio galaxies. A further 14 sources with featureless spectra have been classified as BL Lac objects. Spectra were obtained at three telescopes: the 3.58 m European Southern Observatory New Technology Telescope, and the two 8.2 m Gemini telescopes in Hawaii and Chile. While most of the sources are powerful quasars, a significant fraction of radio galaxies is also included from the list of non-defining ICRF radio sources.",

keywords = "BL Lacertae objects: general, galaxies: active, quasars: emission lines, radio continuum: general, reference systems",

author = "O. Titov and T. Pursimo and Johnston, {Helen M.} and Stanford, {Laura M.} and Hunstead, {Richard W.} and Jauncey, {David L.} and Zenere, {Katrina A.}",

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year = "2017",

month = apr,

doi = "10.3847/1538-3881/aa61fd",

language = "English",

volume = "153",

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T1 - Optical Spectra of Candidate International Celestial Reference Frame (ICRF) Flat-spectrum Radio Sources. III.

AU - Titov, O.

AU - Pursimo, T.

AU - Johnston, Helen M.

AU - Stanford, Laura M.

AU - Hunstead, Richard W.

AU - Jauncey, David L.

AU - Zenere, Katrina A.

PY - 2017/4

Y1 - 2017/4

N2 - In extending our spectroscopic program, which targets sources drawn from the International Celestial Reference Frame (ICRF) Catalog, we have obtained spectra for ∼160 compact, flat-spectrum radio sources and determined redshifts for 112 quasars and radio galaxies. A further 14 sources with featureless spectra have been classified as BL Lac objects. Spectra were obtained at three telescopes: the 3.58 m European Southern Observatory New Technology Telescope, and the two 8.2 m Gemini telescopes in Hawaii and Chile. While most of the sources are powerful quasars, a significant fraction of radio galaxies is also included from the list of non-defining ICRF radio sources.

AB - In extending our spectroscopic program, which targets sources drawn from the International Celestial Reference Frame (ICRF) Catalog, we have obtained spectra for ∼160 compact, flat-spectrum radio sources and determined redshifts for 112 quasars and radio galaxies. A further 14 sources with featureless spectra have been classified as BL Lac objects. Spectra were obtained at three telescopes: the 3.58 m European Southern Observatory New Technology Telescope, and the two 8.2 m Gemini telescopes in Hawaii and Chile. While most of the sources are powerful quasars, a significant fraction of radio galaxies is also included from the list of non-defining ICRF radio sources.

KW - BL Lacertae objects: general

KW - galaxies: active

KW - quasars: emission lines

KW - radio continuum: general

KW - reference systems

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DO - 10.3847/1538-3881/aa61fd

M3 - Article

SN - 0004-6256

VL - 153

JO - Astronomical Journal

JF - Astronomical Journal

IS - 4

M1 - 157

ER -

Optical Spectra of Candidate International Celestial Reference Frame (ICRF) Flat-spectrum Radio Sources. III.

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