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Galaxy And Mass Assembly (GAMA): the input catalogue and star-galaxy separation

Baldry, I. K. ; Robotham, A. S. G. ; Hill, D. T. ; Driver, S. P. ; Liske, J. ; Norberg, P. ; Bamford, S. P. ; Hopkins, A. M. ; Loveday, J. ; Peacock, J. A. ; Cameron, E. ; Croom, S. M. ; Cross, N. J. G. ; Doyle, I. F. ; Dye, S. ; Frenk, C. S. ; Jones, D. H. ; van Kampen, E. ; Kelvin, L. S. ; Nichol, R. C. ; Parkinson, H. R. ; Popescu, C. C. ; Prescott, M. ; Sharp, R. G. ; Sutherland, W. J. ; Thomas, D. ; Tuffs, R. J.

In: Monthly Notices of the Royal Astronomical Society, 2010, vol. 404, no. 1, p. 86-100

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    Titel
    • Galaxy And Mass Assembly (GAMA): the input catalogue and star-galaxy separation
    Autor
    • Baldry, I. K.. Astrophysics Research Institute, Liverpool John Moores University, Twelve Quays House, Egerton Wharf, Birkenhead CH41 1LD
    • Robotham, A. S. G.. Scottish Universities' Physics Alliance (SUPA), School of Physics and Astronomy, University of St Andrews, North Haugh, St Andrews, Fife KY16 9SS
    • Hill, D. T.. Scottish Universities' Physics Alliance (SUPA), School of Physics and Astronomy, University of St Andrews, North Haugh, St Andrews, Fife KY16 9SS
    • Driver, S. P.. Scottish Universities' Physics Alliance (SUPA), School of Physics and Astronomy, University of St Andrews, North Haugh, St Andrews, Fife KY16 9SS
    • Liske, J.. European Southern Observatory, Karl-Schwarzschild-Str. 2, 85748 Garching, Germany
    • Norberg, P.. SUPA, Institute for Astronomy, University of Edinburgh, Royal Observatory, Blackford Hill, Edinburgh EH9 3HJ
    • Bamford, S. P.. Centre for Astronomy and Particle Theory, University of Nottingham, University Park, Nottingham NG7 2RD
    • Hopkins, A. M.. Anglo Australian Observatory, PO Box 296, Epping, NSW 1710, Australia
    • Loveday, J.. Astronomy Centre, University of Sussex, Falmer, Brighton BN1 9QH
    • Peacock, J. A.. SUPA, Institute for Astronomy, University of Edinburgh, Royal Observatory, Blackford Hill, Edinburgh EH9 3HJ
    • Cameron, E.. Scottish Universities' Physics Alliance (SUPA), School of Physics and Astronomy, University of St Andrews, North Haugh, St Andrews, Fife KY16 9SS
    • Croom, S. M.. Sydney Institute for Astronomy, School of Physics, University of Sydney, NSW 2006, Australia
    • Cross, N. J. G.. SUPA, Institute for Astronomy, University of Edinburgh, Royal Observatory, Blackford Hill, Edinburgh EH9 3HJ
    • Doyle, I. F.. Institute of Cosmology and Gravitation (ICG), University of Portsmouth, Dennis Sciama Building, Burnaby Road, Portsmouth PO1 3FX
    • Dye, S.. School of Physics & Astronomy, Cardiff University, Queens Buildings, The Parade, Cardiff CF24 3AA
    • Frenk, C. S.. Institute for Computational Cosmology, Department of Physics, Durham University, South Road, Durham DH1 3LE
    • Jones, D. H.. Anglo Australian Observatory, PO Box 296, Epping, NSW 1710, Australia
    • van Kampen, E.. European Southern Observatory, Karl-Schwarzschild-Str. 2, 85748 Garching, Germany
    • Kelvin, L. S.. Scottish Universities' Physics Alliance (SUPA), School of Physics and Astronomy, University of St Andrews, North Haugh, St Andrews, Fife KY16 9SS
    • Nichol, R. C.. Institute of Cosmology and Gravitation (ICG), University of Portsmouth, Dennis Sciama Building, Burnaby Road, Portsmouth PO1 3FX
    • Parkinson, H. R.. SUPA, Institute for Astronomy, University of Edinburgh, Royal Observatory, Blackford Hill, Edinburgh EH9 3HJ
    • Popescu, C. C.. Jeremiah Horrocks Institute, University of Central Lancashire, Preston PR1 2HE
    • Prescott, M.. Astrophysics Research Institute, Liverpool John Moores University, Twelve Quays House, Egerton Wharf, Birkenhead CH41 1LD
    • Sharp, R. G.. Anglo Australian Observatory, PO Box 296, Epping, NSW 1710, Australia
    • Sutherland, W. J.. Astronomy Unit, Queen Mary University London, Mile End Rd, London E1 4NS
    • Thomas, D.. Institute of Cosmology and Gravitation (ICG), University of Portsmouth, Dennis Sciama Building, Burnaby Road, Portsmouth PO1 3FX
    • Tuffs, R. J.. Max Planck Institute for Nuclear Physics (MPIK), Saupfercheckweg 1, D-69117 Heidelberg, Germany
    Dokumententyp
    • Postprint
    Sprache
    • Englisch
    Veröffentlicht in
    • Monthly Notices of the Royal Astronomical Society, 2010, vol. 404, no. 1, p. 86-100. Blackwell Publishing Ltd
    Andere elektronische Ausgabe
    OAI-PMH-ID
    • oai:doc.rero.ch:294435
    Summary
    We describe the spectroscopic target selection for the Galaxy And Mass Assembly (GAMA) survey. The input catalogue is drawn from the Sloan Digital Sky Survey (SDSS) and UKIRT Infrared Deep Sky Survey (UKIDSS). The initial aim is to measure redshifts for galaxies in three 4°× 12° regions at 9, 12 and 14.5 h, on the celestial equator, with magnitude selections r < 19.4, z < 18.2 and KAB < 17.6 over all three regions, and r < 19.8 in the 12-h region. The target density is 1080 deg−2 in the 12-h region and 720 deg−2 in the other regions. The average GAMA target density and area are compared with completed and ongoing galaxy redshift surveys. The GAMA survey implements a highly complete star-galaxy separation that jointly uses an intensity-profile separator (Δsg=rpsf−rmodel as per the SDSS) and a colour separator. The colour separator is defined as Δsg,jk=J−K−f(g−i), where f(g−i) is a quadratic fit to the J−K colour of the stellar locus over the range 0.3 < g−i < 2.3. All galaxy populations investigated are well separated with Δsg,jk > 0.2. From 2 yr out of a 3-yr AAOmega program on the Anglo-Australian Telescope, we have obtained 79 599 unique galaxy redshifts. Previously known redshifts in the GAMA region bring the total up to 98 497. The median galaxy redshift is 0.2 with 99 per cent at z < 0.5. We present some of the global statistical properties of the survey, including K-band galaxy counts, colour-redshift relations and preliminary n(z)