High-redshift quasars found in sloan digital sky survey commissioning data. VI. Sloan digital sky survey spectrograph observations

Scott F. Anderson, Xiaohui Fan, Gordon T. Richards, Donald P. Schneider, Michael A. Strauss, Daniel E. Vanden Berk, James E. Gunn, Gillian R. Knapp, David Schlegel, Wolfgang Voges, Brian Yanny, Neta A. Bahcall, Mariangela Bernardi, J. Brinkmann, Robert Brunner, Istvan Csabái, Mamoru Doi, Masataka Fukugita, G. S. Hennessy, Željko IvezićPeter Z. Kunszt, Donald Q. Lamb, Jon Loveday, Robert H. Lupton, Timothy A. McKay, Jeffrey A. Munn, R. C. Nichol, G. P. Szokoly, Donald G. York

Research output: Contribution to journalArticle

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Abstract

We present data for over 100 high-redshift quasars found in ≈700 deg2 by the Sloan Digital Sky Survey (SDSS), using automated selection algorithms applied to SDSS imaging data and with spectroscopic confirmation obtained during routine spectroscopic observations by the Sloan 2.5 m telescope. The SDSS spectra cover the wavelength range 3900-9200 Å at a spectral resolution of 1800 and have been obtained for 116 quasars with redshifts greater than 3.94; 92 of these objects were previously uncataloged, significantly increasing the current tally of published z > 4 quasars. The paper also reports observations of seven additional new z > 4 quasars; all were selected from the SDSS imaging survey and spectroscopically confirmed with observations by the Apache Point Observatory's 3.5 m telescope or the Hobby-Eberly Telescope. The i′ magnitudes of the quasars range from 18.03 to 20.68. Of the 99 new objects reported in this paper, 13 appear to be broad absorption line quasars. Five quasars, including one object at a redshift of 5.11, have 20 cm peak flux densities greater than 1 mJy. Two of the quasars, both at z ≈ 4.5, have very weak emission lines; one of these objects is a radio source. Nineteen of the newly discovered objects have redshifts above 4.6, and the maximum redshift is z = 5.41; among objects reported to date, the latter is the third highest redshift AGN and is penultimate in redshift among luminous quasars.

Original languageEnglish (US)
Pages (from-to)503-517
Number of pages15
JournalAstronomical Journal
Volume122
Issue number2
DOIs
StatePublished - Aug 2001
Externally publishedYes

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quasars
spectrographs
telescopes
spectral resolution
observatory
radio
wavelength
observatories
flux density
wavelengths

Keywords

  • Early universe
  • Quasars: general

ASJC Scopus subject areas

  • Space and Planetary Science
  • Astronomy and Astrophysics

Cite this

Anderson, S. F., Fan, X., Richards, G. T., Schneider, D. P., Strauss, M. A., Vanden Berk, D. E., ... York, D. G. (2001). High-redshift quasars found in sloan digital sky survey commissioning data. VI. Sloan digital sky survey spectrograph observations. Astronomical Journal, 122(2), 503-517. https://doi.org/10.1086/321168

High-redshift quasars found in sloan digital sky survey commissioning data. VI. Sloan digital sky survey spectrograph observations. / Anderson, Scott F.; Fan, Xiaohui; Richards, Gordon T.; Schneider, Donald P.; Strauss, Michael A.; Vanden Berk, Daniel E.; Gunn, James E.; Knapp, Gillian R.; Schlegel, David; Voges, Wolfgang; Yanny, Brian; Bahcall, Neta A.; Bernardi, Mariangela; Brinkmann, J.; Brunner, Robert; Csabái, Istvan; Doi, Mamoru; Fukugita, Masataka; Hennessy, G. S.; Ivezić, Željko; Kunszt, Peter Z.; Lamb, Donald Q.; Loveday, Jon; Lupton, Robert H.; McKay, Timothy A.; Munn, Jeffrey A.; Nichol, R. C.; Szokoly, G. P.; York, Donald G.

In: Astronomical Journal, Vol. 122, No. 2, 08.2001, p. 503-517.

Research output: Contribution to journalArticle

Anderson, SF, Fan, X, Richards, GT, Schneider, DP, Strauss, MA, Vanden Berk, DE, Gunn, JE, Knapp, GR, Schlegel, D, Voges, W, Yanny, B, Bahcall, NA, Bernardi, M, Brinkmann, J, Brunner, R, Csabái, I, Doi, M, Fukugita, M, Hennessy, GS, Ivezić, Ž, Kunszt, PZ, Lamb, DQ, Loveday, J, Lupton, RH, McKay, TA, Munn, JA, Nichol, RC, Szokoly, GP & York, DG 2001, 'High-redshift quasars found in sloan digital sky survey commissioning data. VI. Sloan digital sky survey spectrograph observations', Astronomical Journal, vol. 122, no. 2, pp. 503-517. https://doi.org/10.1086/321168
Anderson, Scott F. ; Fan, Xiaohui ; Richards, Gordon T. ; Schneider, Donald P. ; Strauss, Michael A. ; Vanden Berk, Daniel E. ; Gunn, James E. ; Knapp, Gillian R. ; Schlegel, David ; Voges, Wolfgang ; Yanny, Brian ; Bahcall, Neta A. ; Bernardi, Mariangela ; Brinkmann, J. ; Brunner, Robert ; Csabái, Istvan ; Doi, Mamoru ; Fukugita, Masataka ; Hennessy, G. S. ; Ivezić, Željko ; Kunszt, Peter Z. ; Lamb, Donald Q. ; Loveday, Jon ; Lupton, Robert H. ; McKay, Timothy A. ; Munn, Jeffrey A. ; Nichol, R. C. ; Szokoly, G. P. ; York, Donald G. / High-redshift quasars found in sloan digital sky survey commissioning data. VI. Sloan digital sky survey spectrograph observations. In: Astronomical Journal. 2001 ; Vol. 122, No. 2. pp. 503-517.
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abstract = "We present data for over 100 high-redshift quasars found in ≈700 deg2 by the Sloan Digital Sky Survey (SDSS), using automated selection algorithms applied to SDSS imaging data and with spectroscopic confirmation obtained during routine spectroscopic observations by the Sloan 2.5 m telescope. The SDSS spectra cover the wavelength range 3900-9200 {\AA} at a spectral resolution of 1800 and have been obtained for 116 quasars with redshifts greater than 3.94; 92 of these objects were previously uncataloged, significantly increasing the current tally of published z > 4 quasars. The paper also reports observations of seven additional new z > 4 quasars; all were selected from the SDSS imaging survey and spectroscopically confirmed with observations by the Apache Point Observatory's 3.5 m telescope or the Hobby-Eberly Telescope. The i′ magnitudes of the quasars range from 18.03 to 20.68. Of the 99 new objects reported in this paper, 13 appear to be broad absorption line quasars. Five quasars, including one object at a redshift of 5.11, have 20 cm peak flux densities greater than 1 mJy. Two of the quasars, both at z ≈ 4.5, have very weak emission lines; one of these objects is a radio source. Nineteen of the newly discovered objects have redshifts above 4.6, and the maximum redshift is z = 5.41; among objects reported to date, the latter is the third highest redshift AGN and is penultimate in redshift among luminous quasars.",
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AU - Anderson, Scott F.

AU - Fan, Xiaohui

AU - Richards, Gordon T.

AU - Schneider, Donald P.

AU - Strauss, Michael A.

AU - Vanden Berk, Daniel E.

AU - Gunn, James E.

AU - Knapp, Gillian R.

AU - Schlegel, David

AU - Voges, Wolfgang

AU - Yanny, Brian

AU - Bahcall, Neta A.

AU - Bernardi, Mariangela

AU - Brinkmann, J.

AU - Brunner, Robert

AU - Csabái, Istvan

AU - Doi, Mamoru

AU - Fukugita, Masataka

AU - Hennessy, G. S.

AU - Ivezić, Željko

AU - Kunszt, Peter Z.

AU - Lamb, Donald Q.

AU - Loveday, Jon

AU - Lupton, Robert H.

AU - McKay, Timothy A.

AU - Munn, Jeffrey A.

AU - Nichol, R. C.

AU - Szokoly, G. P.

AU - York, Donald G.

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