The 2dF-SDSS LRG and QSO Survey

The spectroscopic QSO catalogue

Scott M. Croom, Gordon T. Richards, Tom Shanks, Brian J. Boyle, Robert G. Sharp, Joss Bland-Hawthorn, Terry Bridges, Robert J. Brunner, Russell Cannon, Daniel Carson, Kuenley Chiu, Matthew Colless, Warrick Couch, Roberto De Propris, Michael J. Drinkwater, Alastair Edge, Stephen Fine, Jon Loveday, Lance Miller, Adam D. Myers & 10 others Robert C. Nichol, Phil Outram, Kevin Pimbblet, Isaac Roseboom, Nicholas Ross, Donald P. Schneider, Allyn Smith, Chris Stoughton, Michael A. Strauss, David Wake

Research output: Contribution to journalArticle

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Abstract

We present the final spectroscopic QSO catalogue from the 2dF-SDSS LRG (luminous red galaxy) and QSO (2SLAQ) survey. This is a deep, 18 < g < 21.85 (extinction corrected), sample aimed at probing in detail the faint end of the broad line active galactic nuclei luminosity distribution at z ≲ 2.6. The candidate QSOs were selected from SDSS photometry and observed spectroscopically with the 2dF spectrograph on the Anglo-Australian Telescope. This sample covers an area of 191.9 deg2 and contains new spectra of 16 326 objects, of which 8764 are QSOs and 7623 are newly discovered [the remainder were previously identified by the 2dF QSO Redshift Survey (2QZ) and SDSS]. The full QSO sample (including objects previously observed in the SDSS and 2QZ surveys) contains 12 702 QSOs. The new 2SLAQ spectroscopic data set also contains 2343 Galactic stars, including 362 white dwarfs, and 2924 narrow emission-line galaxies with a median redshift of z = 0.22. We present detailed completeness estimates for the survey, based on modelling of QSO colours, including host-galaxy contributions. This calculation shows that at g ≃ 21.85 QSO colours are significantly affected by the presence of a host galaxy up to redshift z ∼ 1 in the SDSS ugriz bands. In particular, we see a significant reddening of the objects in g - i towards the fainter g-band magnitudes. This reddening is consistent with the QSO host galaxies being dominated by a stellar population of age at least 2-3 Gyr. The full catalogue, including completeness estimates, is available on-line at http://www.2slaq.info/ .

Original languageEnglish (US)
Pages (from-to)19-44
Number of pages26
JournalMonthly Notices of the Royal Astronomical Society
Volume392
Issue number1
DOIs
StatePublished - Jan 1 2009

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quasars
catalogs
galaxies
completeness
extinction
color
modeling
estimates
active galactic nuclei
spectrographs
photometry
luminosity
telescopes
stars

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science

Cite this

Croom, S. M., Richards, G. T., Shanks, T., Boyle, B. J., Sharp, R. G., Bland-Hawthorn, J., ... Wake, D. (2009). The 2dF-SDSS LRG and QSO Survey: The spectroscopic QSO catalogue. Monthly Notices of the Royal Astronomical Society, 392(1), 19-44. https://doi.org/10.1111/j.1365-2966.2008.14052.x
Croom, Scott M. ; Richards, Gordon T. ; Shanks, Tom ; Boyle, Brian J. ; Sharp, Robert G. ; Bland-Hawthorn, Joss ; Bridges, Terry ; Brunner, Robert J. ; Cannon, Russell ; Carson, Daniel ; Chiu, Kuenley ; Colless, Matthew ; Couch, Warrick ; De Propris, Roberto ; Drinkwater, Michael J. ; Edge, Alastair ; Fine, Stephen ; Loveday, Jon ; Miller, Lance ; Myers, Adam D. ; Nichol, Robert C. ; Outram, Phil ; Pimbblet, Kevin ; Roseboom, Isaac ; Ross, Nicholas ; Schneider, Donald P. ; Smith, Allyn ; Stoughton, Chris ; Strauss, Michael A. ; Wake, David. / The 2dF-SDSS LRG and QSO Survey : The spectroscopic QSO catalogue. In: Monthly Notices of the Royal Astronomical Society. 2009 ; Vol. 392, No. 1. pp. 19-44.
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abstract = "We present the final spectroscopic QSO catalogue from the 2dF-SDSS LRG (luminous red galaxy) and QSO (2SLAQ) survey. This is a deep, 18 < g < 21.85 (extinction corrected), sample aimed at probing in detail the faint end of the broad line active galactic nuclei luminosity distribution at z ≲ 2.6. The candidate QSOs were selected from SDSS photometry and observed spectroscopically with the 2dF spectrograph on the Anglo-Australian Telescope. This sample covers an area of 191.9 deg2 and contains new spectra of 16 326 objects, of which 8764 are QSOs and 7623 are newly discovered [the remainder were previously identified by the 2dF QSO Redshift Survey (2QZ) and SDSS]. The full QSO sample (including objects previously observed in the SDSS and 2QZ surveys) contains 12 702 QSOs. The new 2SLAQ spectroscopic data set also contains 2343 Galactic stars, including 362 white dwarfs, and 2924 narrow emission-line galaxies with a median redshift of z = 0.22. We present detailed completeness estimates for the survey, based on modelling of QSO colours, including host-galaxy contributions. This calculation shows that at g ≃ 21.85 QSO colours are significantly affected by the presence of a host galaxy up to redshift z ∼ 1 in the SDSS ugriz bands. In particular, we see a significant reddening of the objects in g - i towards the fainter g-band magnitudes. This reddening is consistent with the QSO host galaxies being dominated by a stellar population of age at least 2-3 Gyr. The full catalogue, including completeness estimates, is available on-line at http://www.2slaq.info/ .",
author = "Croom, {Scott M.} and Richards, {Gordon T.} and Tom Shanks and Boyle, {Brian J.} and Sharp, {Robert G.} and Joss Bland-Hawthorn and Terry Bridges and Brunner, {Robert J.} and Russell Cannon and Daniel Carson and Kuenley Chiu and Matthew Colless and Warrick Couch and {De Propris}, Roberto and Drinkwater, {Michael J.} and Alastair Edge and Stephen Fine and Jon Loveday and Lance Miller and Myers, {Adam D.} and Nichol, {Robert C.} and Phil Outram and Kevin Pimbblet and Isaac Roseboom and Nicholas Ross and Schneider, {Donald P.} and Allyn Smith and Chris Stoughton and Strauss, {Michael A.} and David Wake",
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Croom, SM, Richards, GT, Shanks, T, Boyle, BJ, Sharp, RG, Bland-Hawthorn, J, Bridges, T, Brunner, RJ, Cannon, R, Carson, D, Chiu, K, Colless, M, Couch, W, De Propris, R, Drinkwater, MJ, Edge, A, Fine, S, Loveday, J, Miller, L, Myers, AD, Nichol, RC, Outram, P, Pimbblet, K, Roseboom, I, Ross, N, Schneider, DP, Smith, A, Stoughton, C, Strauss, MA & Wake, D 2009, 'The 2dF-SDSS LRG and QSO Survey: The spectroscopic QSO catalogue', Monthly Notices of the Royal Astronomical Society, vol. 392, no. 1, pp. 19-44. https://doi.org/10.1111/j.1365-2966.2008.14052.x

The 2dF-SDSS LRG and QSO Survey : The spectroscopic QSO catalogue. / Croom, Scott M.; Richards, Gordon T.; Shanks, Tom; Boyle, Brian J.; Sharp, Robert G.; Bland-Hawthorn, Joss; Bridges, Terry; Brunner, Robert J.; Cannon, Russell; Carson, Daniel; Chiu, Kuenley; Colless, Matthew; Couch, Warrick; De Propris, Roberto; Drinkwater, Michael J.; Edge, Alastair; Fine, Stephen; Loveday, Jon; Miller, Lance; Myers, Adam D.; Nichol, Robert C.; Outram, Phil; Pimbblet, Kevin; Roseboom, Isaac; Ross, Nicholas; Schneider, Donald P.; Smith, Allyn; Stoughton, Chris; Strauss, Michael A.; Wake, David.

In: Monthly Notices of the Royal Astronomical Society, Vol. 392, No. 1, 01.01.2009, p. 19-44.

Research output: Contribution to journalArticle

TY - JOUR

T1 - The 2dF-SDSS LRG and QSO Survey

T2 - The spectroscopic QSO catalogue

AU - Croom, Scott M.

AU - Richards, Gordon T.

AU - Shanks, Tom

AU - Boyle, Brian J.

AU - Sharp, Robert G.

AU - Bland-Hawthorn, Joss

AU - Bridges, Terry

AU - Brunner, Robert J.

AU - Cannon, Russell

AU - Carson, Daniel

AU - Chiu, Kuenley

AU - Colless, Matthew

AU - Couch, Warrick

AU - De Propris, Roberto

AU - Drinkwater, Michael J.

AU - Edge, Alastair

AU - Fine, Stephen

AU - Loveday, Jon

AU - Miller, Lance

AU - Myers, Adam D.

AU - Nichol, Robert C.

AU - Outram, Phil

AU - Pimbblet, Kevin

AU - Roseboom, Isaac

AU - Ross, Nicholas

AU - Schneider, Donald P.

AU - Smith, Allyn

AU - Stoughton, Chris

AU - Strauss, Michael A.

AU - Wake, David

PY - 2009/1/1

Y1 - 2009/1/1

N2 - We present the final spectroscopic QSO catalogue from the 2dF-SDSS LRG (luminous red galaxy) and QSO (2SLAQ) survey. This is a deep, 18 < g < 21.85 (extinction corrected), sample aimed at probing in detail the faint end of the broad line active galactic nuclei luminosity distribution at z ≲ 2.6. The candidate QSOs were selected from SDSS photometry and observed spectroscopically with the 2dF spectrograph on the Anglo-Australian Telescope. This sample covers an area of 191.9 deg2 and contains new spectra of 16 326 objects, of which 8764 are QSOs and 7623 are newly discovered [the remainder were previously identified by the 2dF QSO Redshift Survey (2QZ) and SDSS]. The full QSO sample (including objects previously observed in the SDSS and 2QZ surveys) contains 12 702 QSOs. The new 2SLAQ spectroscopic data set also contains 2343 Galactic stars, including 362 white dwarfs, and 2924 narrow emission-line galaxies with a median redshift of z = 0.22. We present detailed completeness estimates for the survey, based on modelling of QSO colours, including host-galaxy contributions. This calculation shows that at g ≃ 21.85 QSO colours are significantly affected by the presence of a host galaxy up to redshift z ∼ 1 in the SDSS ugriz bands. In particular, we see a significant reddening of the objects in g - i towards the fainter g-band magnitudes. This reddening is consistent with the QSO host galaxies being dominated by a stellar population of age at least 2-3 Gyr. The full catalogue, including completeness estimates, is available on-line at http://www.2slaq.info/ .

AB - We present the final spectroscopic QSO catalogue from the 2dF-SDSS LRG (luminous red galaxy) and QSO (2SLAQ) survey. This is a deep, 18 < g < 21.85 (extinction corrected), sample aimed at probing in detail the faint end of the broad line active galactic nuclei luminosity distribution at z ≲ 2.6. The candidate QSOs were selected from SDSS photometry and observed spectroscopically with the 2dF spectrograph on the Anglo-Australian Telescope. This sample covers an area of 191.9 deg2 and contains new spectra of 16 326 objects, of which 8764 are QSOs and 7623 are newly discovered [the remainder were previously identified by the 2dF QSO Redshift Survey (2QZ) and SDSS]. The full QSO sample (including objects previously observed in the SDSS and 2QZ surveys) contains 12 702 QSOs. The new 2SLAQ spectroscopic data set also contains 2343 Galactic stars, including 362 white dwarfs, and 2924 narrow emission-line galaxies with a median redshift of z = 0.22. We present detailed completeness estimates for the survey, based on modelling of QSO colours, including host-galaxy contributions. This calculation shows that at g ≃ 21.85 QSO colours are significantly affected by the presence of a host galaxy up to redshift z ∼ 1 in the SDSS ugriz bands. In particular, we see a significant reddening of the objects in g - i towards the fainter g-band magnitudes. This reddening is consistent with the QSO host galaxies being dominated by a stellar population of age at least 2-3 Gyr. The full catalogue, including completeness estimates, is available on-line at http://www.2slaq.info/ .

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