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

8 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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@article{e5e3ecc2ad8448258c347e9191af7c0f,

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.\}",

note = "Publisher Copyright: {\textcopyright} 2017. Commonwealth of Australia (Geoscience Australia)..",

year = "2017",

month = apr,

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

language = "English",

volume = "153",

journal = "Astronomical Journal",

issn = "0004-6256",

publisher = "American Astronomical Society",

number = "4",

}

TY - JOUR

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

UR - https://www.scopus.com/pages/publications/85017386981

U2 - 10.3847/1538-3881/aa61fd

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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