Herschel–ATLAS: counterparts from the ultraviolet–near‐infrared in the science demonstration phase catalogue
Identifieur interne : 001B02 ( Istex/Corpus ); précédent : 001B01; suivant : 001B03Herschel–ATLAS: counterparts from the ultraviolet–near‐infrared in the science demonstration phase catalogue
Auteurs : D. J. B. Smith ; L. Dunne ; S. J. Maddox ; S. Eales ; D. G. Bonfield ; M. J. Jarvis ; W. Sutherland ; S. Fleuren ; E. E. Rigby ; M. A. Thompson ; I. K. Baldry ; S. Bamford ; S. Buttiglione ; A. Cava ; D. L. Clements ; A. Cooray ; S. Croom ; A. Dariush ; G. De Zotti ; S. P. Driver ; J. S. Dunlop ; J. Fritz ; D. T. Hill ; A. Hopkins ; R. Hopwood ; E. Ibar ; R. J. Ivison ; D. H. Jones ; L. Kelvin ; L. Leeuw ; J. Liske ; J. Loveday ; B. F. Madore ; P. Norberg ; P. Panuzzo ; E. Pascale ; M. Pohlen ; C. C. Popescu ; M. Prescott ; A. Robotham ; G. Rodighiero ; D. Scott ; M. Seibert ; R. Sharp ; P. Temi ; R. J. Tuffs ; P. Van Der Werf ; E. Van KampenSource :
- Monthly Notices of the Royal Astronomical Society [ 0035-8711 ] ; 2011-09-11.
English descriptors
Abstract
We present a technique to identify optical counterparts of 250‐μm‐selected sources from the Herschel–ATLAS survey. Of the 6621 250 μm > 32‐mJy sources in our science demonstration catalogue we find that ∼60 per cent have counterparts brighter than r = 22.4 mag in the Sloan Digital Sky Survey. Applying a likelihood ratio technique we are able to identify 2423 of the counterparts with a reliability R > 0.8. This is approximately 37 per cent of the full 250‐μm catalogue. We have estimated photometric redshifts for each of these 2423 reliable counterparts, while 1099 also have spectroscopic redshifts collated from several different sources, including the GAMA survey. We estimate the completeness of identifying counterparts as a function of redshift, and present evidence that 250‐μm‐selected Herschel–ATLAS galaxies have a bimodal redshift distribution. Those with reliable optical identifications have a redshift distribution peaking at z ≈ 0.25 ± 0.05, while submillimetre colours suggest that a significant fraction with no counterpart above the r‐band limit have z > 1. We also suggest a method for selecting populations of strongly lensed high‐redshift galaxies. Our identifications are matched to UV–NIR photometry from the GAMA survey, and these data are available as part of the Herschel–ATLAS public data release.
Url:
DOI: 10.1111/j.1365-2966.2011.18827.x
Links to Exploration step
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<author><name sortKey="Cava, A" sort="Cava, A" uniqKey="Cava A" first="A." last="Cava">A. Cava</name>
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<author><name sortKey="Clements, D L" sort="Clements, D L" uniqKey="Clements D" first="D. L." last="Clements">D. L. Clements</name>
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<author><name sortKey="Cooray, A" sort="Cooray, A" uniqKey="Cooray A" first="A." last="Cooray">A. Cooray</name>
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<author><name sortKey="Croom, S" sort="Croom, S" uniqKey="Croom S" first="S." last="Croom">S. Croom</name>
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<author><name sortKey="Driver, S P" sort="Driver, S P" uniqKey="Driver S" first="S. P." last="Driver">S. P. Driver</name>
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<author><name sortKey="Fritz, J" sort="Fritz, J" uniqKey="Fritz J" first="J." last="Fritz">J. Fritz</name>
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<author><name sortKey="Ibar, E" sort="Ibar, E" uniqKey="Ibar E" first="E." last="Ibar">E. Ibar</name>
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<affiliation><mods:affiliation>Uk Astronomy Technology Centre, Royal Observatory, Edinburgh EH9 3HJ</mods:affiliation>
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<author><name sortKey="Jones, D H" sort="Jones, D H" uniqKey="Jones D" first="D. H." last="Jones">D. H. Jones</name>
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<author><name sortKey="Kelvin, L" sort="Kelvin, L" uniqKey="Kelvin L" first="L." last="Kelvin">L. Kelvin</name>
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<author><name sortKey="Leeuw, L" sort="Leeuw, L" uniqKey="Leeuw L" first="L." last="Leeuw">L. Leeuw</name>
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<author><name sortKey="Liske, J" sort="Liske, J" uniqKey="Liske J" first="J." last="Liske">J. Liske</name>
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<author><name sortKey="Loveday, J" sort="Loveday, J" uniqKey="Loveday J" first="J." last="Loveday">J. Loveday</name>
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<author><name sortKey="Madore, B F" sort="Madore, B F" uniqKey="Madore B" first="B. F." last="Madore">B. F. Madore</name>
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<author><name sortKey="Norberg, P" sort="Norberg, P" uniqKey="Norberg P" first="P." last="Norberg">P. Norberg</name>
<affiliation><mods:affiliation>Institute for Astronomy, University of Edinburgh, Royal Observatory, Edinburgh EH9 3HJ</mods:affiliation>
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<author><name sortKey="Panuzzo, P" sort="Panuzzo, P" uniqKey="Panuzzo P" first="P." last="Panuzzo">P. Panuzzo</name>
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<author><name sortKey="Pascale, E" sort="Pascale, E" uniqKey="Pascale E" first="E." last="Pascale">E. Pascale</name>
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<author><name sortKey="Pohlen, M" sort="Pohlen, M" uniqKey="Pohlen M" first="M." last="Pohlen">M. Pohlen</name>
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</affiliation>
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<author><name sortKey="Popescu, C C" sort="Popescu, C C" uniqKey="Popescu C" first="C. C." last="Popescu">C. C. Popescu</name>
<affiliation><mods:affiliation>Jeremiah Horrocks Institute, University of Central Lancashire, Preston PR1 2HE</mods:affiliation>
</affiliation>
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<author><name sortKey="Prescott, M" sort="Prescott, M" uniqKey="Prescott M" first="M." last="Prescott">M. Prescott</name>
<affiliation><mods:affiliation>Astrophysics Research Institute, Liverpool John Moores University, Twelve Quays House, Egerton Wharf, Birkenhead CH41 1LD</mods:affiliation>
</affiliation>
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<author><name sortKey="Robotham, A" sort="Robotham, A" uniqKey="Robotham A" first="A." last="Robotham">A. Robotham</name>
<affiliation><mods:affiliation>SUPA, School of Physics and Astronomy, University of St. Andrews, North Haugh, St. Andrews KY16 9SS</mods:affiliation>
</affiliation>
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<author><name sortKey="Rodighiero, G" sort="Rodighiero, G" uniqKey="Rodighiero G" first="G." last="Rodighiero">G. Rodighiero</name>
<affiliation><mods:affiliation>INAF – Osservatorio Astronomico di Padova, Vicolo Osservatorio 5, I‐35122 Padova, Italy</mods:affiliation>
</affiliation>
</author>
<author><name sortKey="Scott, D" sort="Scott, D" uniqKey="Scott D" first="D." last="Scott">D. Scott</name>
<affiliation><mods:affiliation>Department of Physics and Astronomy, 6224 Agricultural Road, University of British Columbia, Vancouver, BC V6T 1Z1, Canada</mods:affiliation>
</affiliation>
</author>
<author><name sortKey="Seibert, M" sort="Seibert, M" uniqKey="Seibert M" first="M." last="Seibert">M. Seibert</name>
<affiliation><mods:affiliation>Observatories of the Carnegie Institution, 813 Santa Barbera St., Pasadena, CA 91101, USA</mods:affiliation>
</affiliation>
</author>
<author><name sortKey="Sharp, R" sort="Sharp, R" uniqKey="Sharp R" first="R." last="Sharp">R. Sharp</name>
<affiliation><mods:affiliation>Anglo‐Australian Observatory, PO Box 296, Epping, NSW 1710, Australia</mods:affiliation>
</affiliation>
</author>
<author><name sortKey="Temi, P" sort="Temi, P" uniqKey="Temi P" first="P." last="Temi">P. Temi</name>
<affiliation><mods:affiliation>Astrophysics Branch, NASA Ames Research Center, Mail Stop 2456, Moffett Field, CA 94035, USA</mods:affiliation>
</affiliation>
</author>
<author><name sortKey="Tuffs, R J" sort="Tuffs, R J" uniqKey="Tuffs R" first="R. J." last="Tuffs">R. J. Tuffs</name>
<affiliation><mods:affiliation>Max Planck Institut für Kernphysik (MPIK), Saupfercheckweg, 69117 Heidelberg, Germany</mods:affiliation>
</affiliation>
</author>
<author><name sortKey="Van Der Werf, P" sort="Van Der Werf, P" uniqKey="Van Der Werf P" first="P." last="Van Der Werf">P. Van Der Werf</name>
<affiliation><mods:affiliation>Institute for Astronomy, University of Edinburgh, Royal Observatory, Edinburgh EH9 3HJ</mods:affiliation>
</affiliation>
<affiliation><mods:affiliation>Leiden Observatory, Leiden University, PO Box 9513, NL ‐ 2300 RA Leiden, the Netherlands</mods:affiliation>
</affiliation>
</author>
<author><name sortKey="Van Kampen, E" sort="Van Kampen, E" uniqKey="Van Kampen E" first="E." last="Van Kampen">E. Van Kampen</name>
<affiliation><mods:affiliation>European Southern Observatory, Karl‐Schwarzschild‐Strasse 2, D‐85748 Garching bei München, Germany</mods:affiliation>
</affiliation>
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<sourceDesc><biblStruct><analytic><title level="a" type="main" xml:lang="en">Herschel–ATLAS: counterparts from the ultraviolet–near‐infrared in the science demonstration phase catalogue</title>
<author><name sortKey="Smith, D J B" sort="Smith, D J B" uniqKey="Smith D" first="D. J. B." last="Smith">D. J. B. Smith</name>
<affiliation><mods:affiliation>Centre for Astronomy and Particle Theory, The School of Physics & Astronomy, Nottingham University, University Park Campus, Nottingham NG7 1HR</mods:affiliation>
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<affiliation><mods:affiliation>Centre for Astrophysics Research, Science & Technology Research Institute, University of Hertfordshire, Hatfield, Herts AL10 9AB</mods:affiliation>
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<affiliation><mods:affiliation>E-mail: daniel.j.b.smith@gmail.com</mods:affiliation>
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<author><name sortKey="Dunne, L" sort="Dunne, L" uniqKey="Dunne L" first="L." last="Dunne">L. Dunne</name>
<affiliation><mods:affiliation>Centre for Astronomy and Particle Theory, The School of Physics & Astronomy, Nottingham University, University Park Campus, Nottingham NG7 1HR</mods:affiliation>
</affiliation>
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<author><name sortKey="Maddox, S J" sort="Maddox, S J" uniqKey="Maddox S" first="S. J." last="Maddox">S. J. Maddox</name>
<affiliation><mods:affiliation>Centre for Astronomy and Particle Theory, The School of Physics & Astronomy, Nottingham University, University Park Campus, Nottingham NG7 1HR</mods:affiliation>
</affiliation>
</author>
<author><name sortKey="Eales, S" sort="Eales, S" uniqKey="Eales S" first="S." last="Eales">S. Eales</name>
<affiliation><mods:affiliation>School of Physics & Astronomy, Cardiff University, Queen Buildings, The Parade, Cardiff CF24 3AA</mods:affiliation>
</affiliation>
</author>
<author><name sortKey="Bonfield, D G" sort="Bonfield, D G" uniqKey="Bonfield D" first="D. G." last="Bonfield">D. G. Bonfield</name>
<affiliation><mods:affiliation>Centre for Astrophysics Research, Science & Technology Research Institute, University of Hertfordshire, Hatfield, Herts AL10 9AB</mods:affiliation>
</affiliation>
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<author><name sortKey="Jarvis, M J" sort="Jarvis, M J" uniqKey="Jarvis M" first="M. J." last="Jarvis">M. J. Jarvis</name>
<affiliation><mods:affiliation>Centre for Astrophysics Research, Science & Technology Research Institute, University of Hertfordshire, Hatfield, Herts AL10 9AB</mods:affiliation>
</affiliation>
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<author><name sortKey="Sutherland, W" sort="Sutherland, W" uniqKey="Sutherland W" first="W." last="Sutherland">W. Sutherland</name>
<affiliation><mods:affiliation>School of Mathematical Sciences, Queen Mary, University of London, Mile End Road, London E1 4NS</mods:affiliation>
</affiliation>
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<author><name sortKey="Fleuren, S" sort="Fleuren, S" uniqKey="Fleuren S" first="S." last="Fleuren">S. Fleuren</name>
<affiliation><mods:affiliation>School of Mathematical Sciences, Queen Mary, University of London, Mile End Road, London E1 4NS</mods:affiliation>
</affiliation>
</author>
<author><name sortKey="Rigby, E E" sort="Rigby, E E" uniqKey="Rigby E" first="E. E." last="Rigby">E. E. Rigby</name>
<affiliation><mods:affiliation>Centre for Astronomy and Particle Theory, The School of Physics & Astronomy, Nottingham University, University Park Campus, Nottingham NG7 1HR</mods:affiliation>
</affiliation>
</author>
<author><name sortKey="Thompson, M A" sort="Thompson, M A" uniqKey="Thompson M" first="M. A." last="Thompson">M. A. Thompson</name>
<affiliation><mods:affiliation>Centre for Astrophysics Research, Science & Technology Research Institute, University of Hertfordshire, Hatfield, Herts AL10 9AB</mods:affiliation>
</affiliation>
</author>
<author><name sortKey="Baldry, I K" sort="Baldry, I K" uniqKey="Baldry I" first="I. K." last="Baldry">I. K. Baldry</name>
<affiliation><mods:affiliation>Astrophysics Research Institute, Liverpool John Moores University, Twelve Quays House, Egerton Wharf, Birkenhead CH41 1LD</mods:affiliation>
</affiliation>
</author>
<author><name sortKey="Bamford, S" sort="Bamford, S" uniqKey="Bamford S" first="S." last="Bamford">S. Bamford</name>
<affiliation><mods:affiliation>Centre for Astronomy and Particle Theory, The School of Physics & Astronomy, Nottingham University, University Park Campus, Nottingham NG7 1HR</mods:affiliation>
</affiliation>
</author>
<author><name sortKey="Buttiglione, S" sort="Buttiglione, S" uniqKey="Buttiglione S" first="S." last="Buttiglione">S. Buttiglione</name>
<affiliation><mods:affiliation>INAF – Osservatorio Astronomico di Padova, Vicolo Osservatorio 5, I‐35122 Padova, Italy</mods:affiliation>
</affiliation>
</author>
<author><name sortKey="Cava, A" sort="Cava, A" uniqKey="Cava A" first="A." last="Cava">A. Cava</name>
<affiliation><mods:affiliation>Departamento de Astrofísica, Facultad de CC. Físicas, Universidad Complutense de Madrid, E‐28040 Madrid, Spain</mods:affiliation>
</affiliation>
</author>
<author><name sortKey="Clements, D L" sort="Clements, D L" uniqKey="Clements D" first="D. L." last="Clements">D. L. Clements</name>
<affiliation><mods:affiliation>Astrophysics Group, Imperial College London, Blackett Laboratory, Prince Consort Road, London SW7 2AZ</mods:affiliation>
</affiliation>
</author>
<author><name sortKey="Cooray, A" sort="Cooray, A" uniqKey="Cooray A" first="A." last="Cooray">A. Cooray</name>
<affiliation><mods:affiliation>University of California, Ivine, Department of Physics & Astronomy, 4186 Frederick Reines Hall, Irvine, CA 92697‐4575, USA</mods:affiliation>
</affiliation>
</author>
<author><name sortKey="Croom, S" sort="Croom, S" uniqKey="Croom S" first="S." last="Croom">S. Croom</name>
<affiliation><mods:affiliation>Sydney Institute for Astronomy, School of Physics, University of Sydney, NSW 2006, Australia</mods:affiliation>
</affiliation>
</author>
<author><name sortKey="Dariush, A" sort="Dariush, A" uniqKey="Dariush A" first="A." last="Dariush">A. Dariush</name>
<affiliation><mods:affiliation>School of Physics & Astronomy, Cardiff University, Queen Buildings, The Parade, Cardiff CF24 3AA</mods:affiliation>
</affiliation>
</author>
<author><name sortKey="De Zotti, G" sort="De Zotti, G" uniqKey="De Zotti G" first="G." last="De Zotti">G. De Zotti</name>
<affiliation><mods:affiliation>INAF – Osservatorio Astronomico di Padova, Vicolo Osservatorio 5, I‐35122 Padova, Italy</mods:affiliation>
</affiliation>
<affiliation><mods:affiliation>SISSA, Via Bonomea 265, I‐34136 Trieste, Italy</mods:affiliation>
</affiliation>
</author>
<author><name sortKey="Driver, S P" sort="Driver, S P" uniqKey="Driver S" first="S. P." last="Driver">S. P. Driver</name>
<affiliation><mods:affiliation>SUPA, School of Physics and Astronomy, University of St. Andrews, North Haugh, St. Andrews KY16 9SS</mods:affiliation>
</affiliation>
<affiliation><mods:affiliation>International Centre for Radio Astronomy Research, The University of Western Australia, 7 Fairway, Crawley, Perth, Western Australia WA6009, Australia</mods:affiliation>
</affiliation>
</author>
<author><name sortKey="Dunlop, J S" sort="Dunlop, J S" uniqKey="Dunlop J" first="J. S." last="Dunlop">J. S. Dunlop</name>
<affiliation><mods:affiliation>Institute for Astronomy, University of Edinburgh, Royal Observatory, Edinburgh EH9 3HJ</mods:affiliation>
</affiliation>
</author>
<author><name sortKey="Fritz, J" sort="Fritz, J" uniqKey="Fritz J" first="J." last="Fritz">J. Fritz</name>
<affiliation><mods:affiliation>Sterrenkundig Observatorium, Universiteit Gent, Krijgslaan 281 S9, B‐9000 Gent, Belgium</mods:affiliation>
</affiliation>
</author>
<author><name sortKey="Hill, D T" sort="Hill, D T" uniqKey="Hill D" first="D. T." last="Hill">D. T. Hill</name>
<affiliation><mods:affiliation>SUPA, School of Physics and Astronomy, University of St. Andrews, North Haugh, St. Andrews KY16 9SS</mods:affiliation>
</affiliation>
</author>
<author><name sortKey="Hopkins, A" sort="Hopkins, A" uniqKey="Hopkins A" first="A." last="Hopkins">A. Hopkins</name>
<affiliation><mods:affiliation>Anglo‐Australian Observatory, PO Box 296, Epping, NSW 1710, Australia</mods:affiliation>
</affiliation>
</author>
<author><name sortKey="Hopwood, R" sort="Hopwood, R" uniqKey="Hopwood R" first="R." last="Hopwood">R. Hopwood</name>
<affiliation><mods:affiliation>Department of Physics and Astronomy, The Open University, Walton Hall, Milton Keynes MK7 6AA</mods:affiliation>
</affiliation>
</author>
<author><name sortKey="Ibar, E" sort="Ibar, E" uniqKey="Ibar E" first="E." last="Ibar">E. Ibar</name>
<affiliation><mods:affiliation>Uk Astronomy Technology Centre, Royal Observatory, Edinburgh EH9 3HJ</mods:affiliation>
</affiliation>
</author>
<author><name sortKey="Ivison, R J" sort="Ivison, R J" uniqKey="Ivison R" first="R. J." last="Ivison">R. J. Ivison</name>
<affiliation><mods:affiliation>Institute for Astronomy, University of Edinburgh, Royal Observatory, Edinburgh EH9 3HJ</mods:affiliation>
</affiliation>
<affiliation><mods:affiliation>Uk Astronomy Technology Centre, Royal Observatory, Edinburgh EH9 3HJ</mods:affiliation>
</affiliation>
</author>
<author><name sortKey="Jones, D H" sort="Jones, D H" uniqKey="Jones D" first="D. H." last="Jones">D. H. Jones</name>
<affiliation><mods:affiliation>Anglo‐Australian Observatory, PO Box 296, Epping, NSW 1710, Australia</mods:affiliation>
</affiliation>
</author>
<author><name sortKey="Kelvin, L" sort="Kelvin, L" uniqKey="Kelvin L" first="L." last="Kelvin">L. Kelvin</name>
<affiliation><mods:affiliation>SUPA, School of Physics and Astronomy, University of St. Andrews, North Haugh, St. Andrews KY16 9SS</mods:affiliation>
</affiliation>
</author>
<author><name sortKey="Leeuw, L" sort="Leeuw, L" uniqKey="Leeuw L" first="L." last="Leeuw">L. Leeuw</name>
<affiliation><mods:affiliation>SETI Institute, 515 N. Whisman Avenue, Mountain View, CA 94043, USA</mods:affiliation>
</affiliation>
</author>
<author><name sortKey="Liske, J" sort="Liske, J" uniqKey="Liske J" first="J." last="Liske">J. Liske</name>
<affiliation><mods:affiliation>European Southern Observatory, Karl‐Schwarzschild‐Strasse 2, D‐85748 Garching bei München, Germany</mods:affiliation>
</affiliation>
</author>
<author><name sortKey="Loveday, J" sort="Loveday, J" uniqKey="Loveday J" first="J." last="Loveday">J. Loveday</name>
<affiliation><mods:affiliation>Astronomy Centre, University of Sussex, Falmer, Brighton BN1 9QH</mods:affiliation>
</affiliation>
</author>
<author><name sortKey="Madore, B F" sort="Madore, B F" uniqKey="Madore B" first="B. F." last="Madore">B. F. Madore</name>
<affiliation><mods:affiliation>Observatories of the Carnegie Institution, 813 Santa Barbera St., Pasadena, CA 91101, USA</mods:affiliation>
</affiliation>
</author>
<author><name sortKey="Norberg, P" sort="Norberg, P" uniqKey="Norberg P" first="P." last="Norberg">P. Norberg</name>
<affiliation><mods:affiliation>Institute for Astronomy, University of Edinburgh, Royal Observatory, Edinburgh EH9 3HJ</mods:affiliation>
</affiliation>
</author>
<author><name sortKey="Panuzzo, P" sort="Panuzzo, P" uniqKey="Panuzzo P" first="P." last="Panuzzo">P. Panuzzo</name>
<affiliation><mods:affiliation>CEA, Laboratoire AIM, Irfu/SAp, Orme des Merisiers, F‐91191 Gif‐sur‐Yvette, France</mods:affiliation>
</affiliation>
</author>
<author><name sortKey="Pascale, E" sort="Pascale, E" uniqKey="Pascale E" first="E." last="Pascale">E. Pascale</name>
<affiliation><mods:affiliation>School of Physics & Astronomy, Cardiff University, Queen Buildings, The Parade, Cardiff CF24 3AA</mods:affiliation>
</affiliation>
</author>
<author><name sortKey="Pohlen, M" sort="Pohlen, M" uniqKey="Pohlen M" first="M." last="Pohlen">M. Pohlen</name>
<affiliation><mods:affiliation>School of Physics & Astronomy, Cardiff University, Queen Buildings, The Parade, Cardiff CF24 3AA</mods:affiliation>
</affiliation>
</author>
<author><name sortKey="Popescu, C C" sort="Popescu, C C" uniqKey="Popescu C" first="C. C." last="Popescu">C. C. Popescu</name>
<affiliation><mods:affiliation>Jeremiah Horrocks Institute, University of Central Lancashire, Preston PR1 2HE</mods:affiliation>
</affiliation>
</author>
<author><name sortKey="Prescott, M" sort="Prescott, M" uniqKey="Prescott M" first="M." last="Prescott">M. Prescott</name>
<affiliation><mods:affiliation>Astrophysics Research Institute, Liverpool John Moores University, Twelve Quays House, Egerton Wharf, Birkenhead CH41 1LD</mods:affiliation>
</affiliation>
</author>
<author><name sortKey="Robotham, A" sort="Robotham, A" uniqKey="Robotham A" first="A." last="Robotham">A. Robotham</name>
<affiliation><mods:affiliation>SUPA, School of Physics and Astronomy, University of St. Andrews, North Haugh, St. Andrews KY16 9SS</mods:affiliation>
</affiliation>
</author>
<author><name sortKey="Rodighiero, G" sort="Rodighiero, G" uniqKey="Rodighiero G" first="G." last="Rodighiero">G. Rodighiero</name>
<affiliation><mods:affiliation>INAF – Osservatorio Astronomico di Padova, Vicolo Osservatorio 5, I‐35122 Padova, Italy</mods:affiliation>
</affiliation>
</author>
<author><name sortKey="Scott, D" sort="Scott, D" uniqKey="Scott D" first="D." last="Scott">D. Scott</name>
<affiliation><mods:affiliation>Department of Physics and Astronomy, 6224 Agricultural Road, University of British Columbia, Vancouver, BC V6T 1Z1, Canada</mods:affiliation>
</affiliation>
</author>
<author><name sortKey="Seibert, M" sort="Seibert, M" uniqKey="Seibert M" first="M." last="Seibert">M. Seibert</name>
<affiliation><mods:affiliation>Observatories of the Carnegie Institution, 813 Santa Barbera St., Pasadena, CA 91101, USA</mods:affiliation>
</affiliation>
</author>
<author><name sortKey="Sharp, R" sort="Sharp, R" uniqKey="Sharp R" first="R." last="Sharp">R. Sharp</name>
<affiliation><mods:affiliation>Anglo‐Australian Observatory, PO Box 296, Epping, NSW 1710, Australia</mods:affiliation>
</affiliation>
</author>
<author><name sortKey="Temi, P" sort="Temi, P" uniqKey="Temi P" first="P." last="Temi">P. Temi</name>
<affiliation><mods:affiliation>Astrophysics Branch, NASA Ames Research Center, Mail Stop 2456, Moffett Field, CA 94035, USA</mods:affiliation>
</affiliation>
</author>
<author><name sortKey="Tuffs, R J" sort="Tuffs, R J" uniqKey="Tuffs R" first="R. J." last="Tuffs">R. J. Tuffs</name>
<affiliation><mods:affiliation>Max Planck Institut für Kernphysik (MPIK), Saupfercheckweg, 69117 Heidelberg, Germany</mods:affiliation>
</affiliation>
</author>
<author><name sortKey="Van Der Werf, P" sort="Van Der Werf, P" uniqKey="Van Der Werf P" first="P." last="Van Der Werf">P. Van Der Werf</name>
<affiliation><mods:affiliation>Institute for Astronomy, University of Edinburgh, Royal Observatory, Edinburgh EH9 3HJ</mods:affiliation>
</affiliation>
<affiliation><mods:affiliation>Leiden Observatory, Leiden University, PO Box 9513, NL ‐ 2300 RA Leiden, the Netherlands</mods:affiliation>
</affiliation>
</author>
<author><name sortKey="Van Kampen, E" sort="Van Kampen, E" uniqKey="Van Kampen E" first="E." last="Van Kampen">E. Van Kampen</name>
<affiliation><mods:affiliation>European Southern Observatory, Karl‐Schwarzschild‐Strasse 2, D‐85748 Garching bei München, Germany</mods:affiliation>
</affiliation>
</author>
</analytic>
<monogr></monogr>
<series><title level="j">Monthly Notices of the Royal Astronomical Society</title>
<idno type="ISSN">0035-8711</idno>
<idno type="eISSN">1365-2966</idno>
<imprint><publisher>Blackwell Publishing Ltd</publisher>
<pubPlace>Oxford, UK</pubPlace>
<date type="published" when="2011-09-11">2011-09-11</date>
<biblScope unit="volume">416</biblScope>
<biblScope unit="issue">2</biblScope>
<biblScope unit="page" from="857">857</biblScope>
<biblScope unit="page" to="872">872</biblScope>
</imprint>
<idno type="ISSN">0035-8711</idno>
</series>
<idno type="istex">A0DF6586BAE8156157D7A336C1BD91E5D2E6B5C1</idno>
<idno type="DOI">10.1111/j.1365-2966.2011.18827.x</idno>
<idno type="ArticleID">MNR18827</idno>
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<seriesStmt><idno type="ISSN">0035-8711</idno>
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<profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>methods: statistical</term>
<term>submillimetre: galaxies</term>
</keywords>
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<langUsage><language ident="en">en</language>
</langUsage>
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<front><div type="abstract" xml:lang="en">We present a technique to identify optical counterparts of 250‐μm‐selected sources from the Herschel–ATLAS survey. Of the 6621 250 μm > 32‐mJy sources in our science demonstration catalogue we find that ∼60 per cent have counterparts brighter than r = 22.4 mag in the Sloan Digital Sky Survey. Applying a likelihood ratio technique we are able to identify 2423 of the counterparts with a reliability R > 0.8. This is approximately 37 per cent of the full 250‐μm catalogue. We have estimated photometric redshifts for each of these 2423 reliable counterparts, while 1099 also have spectroscopic redshifts collated from several different sources, including the GAMA survey. We estimate the completeness of identifying counterparts as a function of redshift, and present evidence that 250‐μm‐selected Herschel–ATLAS galaxies have a bimodal redshift distribution. Those with reliable optical identifications have a redshift distribution peaking at z ≈ 0.25 ± 0.05, while submillimetre colours suggest that a significant fraction with no counterpart above the r‐band limit have z > 1. We also suggest a method for selecting populations of strongly lensed high‐redshift galaxies. Our identifications are matched to UV–NIR photometry from the GAMA survey, and these data are available as part of the Herschel–ATLAS public data release.</div>
</front>
</TEI>
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<author><json:item><name>D. J. B. Smith</name>
<affiliations><json:string>Centre for Astronomy and Particle Theory, The School of Physics & Astronomy, Nottingham University, University Park Campus, Nottingham NG7 1HR</json:string>
<json:string>Centre for Astrophysics Research, Science & Technology Research Institute, University of Hertfordshire, Hatfield, Herts AL10 9AB</json:string>
<json:string>E-mail: daniel.j.b.smith@gmail.com</json:string>
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</json:item>
<json:item><name>L. Dunne</name>
<affiliations><json:string>Centre for Astronomy and Particle Theory, The School of Physics & Astronomy, Nottingham University, University Park Campus, Nottingham NG7 1HR</json:string>
</affiliations>
</json:item>
<json:item><name>S. J. Maddox</name>
<affiliations><json:string>Centre for Astronomy and Particle Theory, The School of Physics & Astronomy, Nottingham University, University Park Campus, Nottingham NG7 1HR</json:string>
</affiliations>
</json:item>
<json:item><name>S. Eales</name>
<affiliations><json:string>School of Physics & Astronomy, Cardiff University, Queen Buildings, The Parade, Cardiff CF24 3AA</json:string>
</affiliations>
</json:item>
<json:item><name>D. G. Bonfield</name>
<affiliations><json:string>Centre for Astrophysics Research, Science & Technology Research Institute, University of Hertfordshire, Hatfield, Herts AL10 9AB</json:string>
</affiliations>
</json:item>
<json:item><name>M. J. Jarvis</name>
<affiliations><json:string>Centre for Astrophysics Research, Science & Technology Research Institute, University of Hertfordshire, Hatfield, Herts AL10 9AB</json:string>
</affiliations>
</json:item>
<json:item><name>W. Sutherland</name>
<affiliations><json:string>School of Mathematical Sciences, Queen Mary, University of London, Mile End Road, London E1 4NS</json:string>
</affiliations>
</json:item>
<json:item><name>S. Fleuren</name>
<affiliations><json:string>School of Mathematical Sciences, Queen Mary, University of London, Mile End Road, London E1 4NS</json:string>
</affiliations>
</json:item>
<json:item><name>E. E. Rigby</name>
<affiliations><json:string>Centre for Astronomy and Particle Theory, The School of Physics & Astronomy, Nottingham University, University Park Campus, Nottingham NG7 1HR</json:string>
</affiliations>
</json:item>
<json:item><name>M. A. Thompson</name>
<affiliations><json:string>Centre for Astrophysics Research, Science & Technology Research Institute, University of Hertfordshire, Hatfield, Herts AL10 9AB</json:string>
</affiliations>
</json:item>
<json:item><name>I. K. Baldry</name>
<affiliations><json:string>Astrophysics Research Institute, Liverpool John Moores University, Twelve Quays House, Egerton Wharf, Birkenhead CH41 1LD</json:string>
</affiliations>
</json:item>
<json:item><name>S. Bamford</name>
<affiliations><json:string>Centre for Astronomy and Particle Theory, The School of Physics & Astronomy, Nottingham University, University Park Campus, Nottingham NG7 1HR</json:string>
</affiliations>
</json:item>
<json:item><name>S. Buttiglione</name>
<affiliations><json:string>INAF – Osservatorio Astronomico di Padova, Vicolo Osservatorio 5, I‐35122 Padova, Italy</json:string>
</affiliations>
</json:item>
<json:item><name>A. Cava</name>
<affiliations><json:string>Departamento de Astrofísica, Facultad de CC. Físicas, Universidad Complutense de Madrid, E‐28040 Madrid, Spain</json:string>
</affiliations>
</json:item>
<json:item><name>D. L. Clements</name>
<affiliations><json:string>Astrophysics Group, Imperial College London, Blackett Laboratory, Prince Consort Road, London SW7 2AZ</json:string>
</affiliations>
</json:item>
<json:item><name>A. Cooray</name>
<affiliations><json:string>University of California, Ivine, Department of Physics & Astronomy, 4186 Frederick Reines Hall, Irvine, CA 92697‐4575, USA</json:string>
</affiliations>
</json:item>
<json:item><name>S. Croom</name>
<affiliations><json:string>Sydney Institute for Astronomy, School of Physics, University of Sydney, NSW 2006, Australia</json:string>
</affiliations>
</json:item>
<json:item><name>A. Dariush</name>
<affiliations><json:string>School of Physics & Astronomy, Cardiff University, Queen Buildings, The Parade, Cardiff CF24 3AA</json:string>
</affiliations>
</json:item>
<json:item><name>G. de Zotti</name>
<affiliations><json:string>INAF – Osservatorio Astronomico di Padova, Vicolo Osservatorio 5, I‐35122 Padova, Italy</json:string>
<json:string>SISSA, Via Bonomea 265, I‐34136 Trieste, Italy</json:string>
</affiliations>
</json:item>
<json:item><name>S. P. Driver</name>
<affiliations><json:string>SUPA, School of Physics and Astronomy, University of St. Andrews, North Haugh, St. Andrews KY16 9SS</json:string>
<json:string>International Centre for Radio Astronomy Research, The University of Western Australia, 7 Fairway, Crawley, Perth, Western Australia WA6009, Australia</json:string>
</affiliations>
</json:item>
<json:item><name>J. S. Dunlop</name>
<affiliations><json:string>Institute for Astronomy, University of Edinburgh, Royal Observatory, Edinburgh EH9 3HJ</json:string>
</affiliations>
</json:item>
<json:item><name>J. Fritz</name>
<affiliations><json:string>Sterrenkundig Observatorium, Universiteit Gent, Krijgslaan 281 S9, B‐9000 Gent, Belgium</json:string>
</affiliations>
</json:item>
<json:item><name>D. T. Hill</name>
<affiliations><json:string>SUPA, School of Physics and Astronomy, University of St. Andrews, North Haugh, St. Andrews KY16 9SS</json:string>
</affiliations>
</json:item>
<json:item><name>A. Hopkins</name>
<affiliations><json:string>Anglo‐Australian Observatory, PO Box 296, Epping, NSW 1710, Australia</json:string>
</affiliations>
</json:item>
<json:item><name>R. Hopwood</name>
<affiliations><json:string>Department of Physics and Astronomy, The Open University, Walton Hall, Milton Keynes MK7 6AA</json:string>
</affiliations>
</json:item>
<json:item><name>E. Ibar</name>
<affiliations><json:string>Uk Astronomy Technology Centre, Royal Observatory, Edinburgh EH9 3HJ</json:string>
</affiliations>
</json:item>
<json:item><name>R. J. Ivison</name>
<affiliations><json:string>Institute for Astronomy, University of Edinburgh, Royal Observatory, Edinburgh EH9 3HJ</json:string>
<json:string>Uk Astronomy Technology Centre, Royal Observatory, Edinburgh EH9 3HJ</json:string>
</affiliations>
</json:item>
<json:item><name>D. H. Jones</name>
<affiliations><json:string>Anglo‐Australian Observatory, PO Box 296, Epping, NSW 1710, Australia</json:string>
</affiliations>
</json:item>
<json:item><name>L. Kelvin</name>
<affiliations><json:string>SUPA, School of Physics and Astronomy, University of St. Andrews, North Haugh, St. Andrews KY16 9SS</json:string>
</affiliations>
</json:item>
<json:item><name>L. Leeuw</name>
<affiliations><json:string>SETI Institute, 515 N. Whisman Avenue, Mountain View, CA 94043, USA</json:string>
</affiliations>
</json:item>
<json:item><name>J. Liske</name>
<affiliations><json:string>European Southern Observatory, Karl‐Schwarzschild‐Strasse 2, D‐85748 Garching bei München, Germany</json:string>
</affiliations>
</json:item>
<json:item><name>J. Loveday</name>
<affiliations><json:string>Astronomy Centre, University of Sussex, Falmer, Brighton BN1 9QH</json:string>
</affiliations>
</json:item>
<json:item><name>B. F. Madore</name>
<affiliations><json:string>Observatories of the Carnegie Institution, 813 Santa Barbera St., Pasadena, CA 91101, USA</json:string>
</affiliations>
</json:item>
<json:item><name>P. Norberg</name>
<affiliations><json:string>Institute for Astronomy, University of Edinburgh, Royal Observatory, Edinburgh EH9 3HJ</json:string>
</affiliations>
</json:item>
<json:item><name>P. Panuzzo</name>
<affiliations><json:string>CEA, Laboratoire AIM, Irfu/SAp, Orme des Merisiers, F‐91191 Gif‐sur‐Yvette, France</json:string>
</affiliations>
</json:item>
<json:item><name>E. Pascale</name>
<affiliations><json:string>School of Physics & Astronomy, Cardiff University, Queen Buildings, The Parade, Cardiff CF24 3AA</json:string>
</affiliations>
</json:item>
<json:item><name>M. Pohlen</name>
<affiliations><json:string>School of Physics & Astronomy, Cardiff University, Queen Buildings, The Parade, Cardiff CF24 3AA</json:string>
</affiliations>
</json:item>
<json:item><name>C. C. Popescu</name>
<affiliations><json:string>Jeremiah Horrocks Institute, University of Central Lancashire, Preston PR1 2HE</json:string>
</affiliations>
</json:item>
<json:item><name>M. Prescott</name>
<affiliations><json:string>Astrophysics Research Institute, Liverpool John Moores University, Twelve Quays House, Egerton Wharf, Birkenhead CH41 1LD</json:string>
</affiliations>
</json:item>
<json:item><name>A. Robotham</name>
<affiliations><json:string>SUPA, School of Physics and Astronomy, University of St. Andrews, North Haugh, St. Andrews KY16 9SS</json:string>
</affiliations>
</json:item>
<json:item><name>G. Rodighiero</name>
<affiliations><json:string>INAF – Osservatorio Astronomico di Padova, Vicolo Osservatorio 5, I‐35122 Padova, Italy</json:string>
</affiliations>
</json:item>
<json:item><name>D. Scott</name>
<affiliations><json:string>Department of Physics and Astronomy, 6224 Agricultural Road, University of British Columbia, Vancouver, BC V6T 1Z1, Canada</json:string>
</affiliations>
</json:item>
<json:item><name>M. Seibert</name>
<affiliations><json:string>Observatories of the Carnegie Institution, 813 Santa Barbera St., Pasadena, CA 91101, USA</json:string>
</affiliations>
</json:item>
<json:item><name>R. Sharp</name>
<affiliations><json:string>Anglo‐Australian Observatory, PO Box 296, Epping, NSW 1710, Australia</json:string>
</affiliations>
</json:item>
<json:item><name>P. Temi</name>
<affiliations><json:string>Astrophysics Branch, NASA Ames Research Center, Mail Stop 2456, Moffett Field, CA 94035, USA</json:string>
</affiliations>
</json:item>
<json:item><name>R. J. Tuffs</name>
<affiliations><json:string>Max Planck Institut für Kernphysik (MPIK), Saupfercheckweg, 69117 Heidelberg, Germany</json:string>
</affiliations>
</json:item>
<json:item><name>P. van der Werf</name>
<affiliations><json:string>Institute for Astronomy, University of Edinburgh, Royal Observatory, Edinburgh EH9 3HJ</json:string>
<json:string>Leiden Observatory, Leiden University, PO Box 9513, NL ‐ 2300 RA Leiden, the Netherlands</json:string>
</affiliations>
</json:item>
<json:item><name>E. van Kampen</name>
<affiliations><json:string>European Southern Observatory, Karl‐Schwarzschild‐Strasse 2, D‐85748 Garching bei München, Germany</json:string>
</affiliations>
</json:item>
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<subject><json:item><lang><json:string>eng</json:string>
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<value>methods: statistical</value>
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<json:item><lang><json:string>eng</json:string>
</lang>
<value>submillimetre: galaxies</value>
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<abstract>We present a technique to identify optical counterparts of 250‐μm‐selected sources from the Herschel–ATLAS survey. Of the 6621 250 μm > 32‐mJy sources in our science demonstration catalogue we find that ∼60 per cent have counterparts brighter than r = 22.4 mag in the Sloan Digital Sky Survey. Applying a likelihood ratio technique we are able to identify 2423 of the counterparts with a reliability R > 0.8. This is approximately 37 per cent of the full 250‐μm catalogue. We have estimated photometric redshifts for each of these 2423 reliable counterparts, while 1099 also have spectroscopic redshifts collated from several different sources, including the GAMA survey. We estimate the completeness of identifying counterparts as a function of redshift, and present evidence that 250‐μm‐selected Herschel–ATLAS galaxies have a bimodal redshift distribution. Those with reliable optical identifications have a redshift distribution peaking at z ≈ 0.25 ± 0.05, while submillimetre colours suggest that a significant fraction with no counterpart above the r‐band limit have z > 1. We also suggest a method for selecting populations of strongly lensed high‐redshift galaxies. Our identifications are matched to UV–NIR photometry from the GAMA survey, and these data are available as part of the Herschel–ATLAS public data release.</abstract>
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<notesStmt><note type="content">*Herschel is an ESA space observatory with science instruments provided by European‐led Principal Investigator consortia and with important participation from NASA.</note>
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<abstract xml:lang="en"><p>We present a technique to identify optical counterparts of 250‐μm‐selected sources from the Herschel–ATLAS survey. Of the 6621 250 μm > 32‐mJy sources in our science demonstration catalogue we find that ∼60 per cent have counterparts brighter than r = 22.4 mag in the Sloan Digital Sky Survey. Applying a likelihood ratio technique we are able to identify 2423 of the counterparts with a reliability R > 0.8. This is approximately 37 per cent of the full 250‐μm catalogue. We have estimated photometric redshifts for each of these 2423 reliable counterparts, while 1099 also have spectroscopic redshifts collated from several different sources, including the GAMA survey. We estimate the completeness of identifying counterparts as a function of redshift, and present evidence that 250‐μm‐selected Herschel–ATLAS galaxies have a bimodal redshift distribution. Those with reliable optical identifications have a redshift distribution peaking at z ≈ 0.25 ± 0.05, while submillimetre colours suggest that a significant fraction with no counterpart above the r‐band limit have z > 1. We also suggest a method for selecting populations of strongly lensed high‐redshift galaxies. Our identifications are matched to UV–NIR photometry from the GAMA survey, and these data are available as part of the Herschel–ATLAS public data release.</p>
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<contentMeta><unparsedEditorialHistory>Accepted 2011 March 29. Received 2011 March 17; in original form 2010 July 28</unparsedEditorialHistory>
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<titleGroup><title type="main"><i>Herschel</i>
–ATLAS: counterparts from the ultraviolet–near‐infrared in the science demonstration phase catalogue<link href="#fn1"><sup>★</sup>
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–ATLAS: counterparts from the ultraviolet–near‐infrared in the science demonstration phase catalogue</title>
<title type="shortAuthors"><i>D. J. B. Smith et al.</i>
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<title type="short">Herschel–<i>ATLAS: counterparts</i>
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<affiliation xml:id="a25" countryCode="CA"><unparsedAffiliation>Department of Physics and Astronomy, 6224 Agricultural Road, University of British Columbia, Vancouver, BC V6T 1Z1, Canada</unparsedAffiliation>
</affiliation>
<affiliation xml:id="a26" countryCode="US"><unparsedAffiliation>Astrophysics Branch, NASA Ames Research Center, Mail Stop 2456, Moffett Field, CA 94035, USA</unparsedAffiliation>
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<affiliation xml:id="a27" countryCode="DE"><unparsedAffiliation>Max Planck Institut für Kernphysik (MPIK), Saupfercheckweg, 69117 Heidelberg, Germany</unparsedAffiliation>
</affiliation>
<affiliation xml:id="a28" countryCode="NL"><unparsedAffiliation>Leiden Observatory, Leiden University, PO Box 9513, NL ‐ 2300 RA Leiden, the Netherlands</unparsedAffiliation>
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<keyword xml:id="k2">submillimetre: galaxies</keyword>
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<abstractGroup><abstract type="main" xml:lang="en"><title type="main">ABSTRACT</title>
<p>We present a technique to identify optical counterparts of 250‐<span type="mathematics">μ</span>
m‐selected sources from the <i>Herschel</i>
–ATLAS survey. Of the 6621 250 <span type="mathematics">μ</span>
m > 32‐mJy sources in our science demonstration catalogue we find that ∼60 per cent have counterparts brighter than <i>r</i>
= 22.4 mag in the Sloan Digital Sky Survey. Applying a likelihood ratio technique we are able to identify 2423 of the counterparts with a reliability <i>R</i>
> 0.8. This is approximately 37 per cent of the full 250‐<span type="mathematics">μ</span>
m catalogue. We have estimated photometric redshifts for each of these 2423 reliable counterparts, while 1099 also have spectroscopic redshifts collated from several different sources, including the GAMA survey. We estimate the completeness of identifying counterparts as a function of redshift, and present evidence that 250‐<span type="mathematics">μ</span>
m‐selected <i>Herschel</i>
–ATLAS galaxies have a bimodal redshift distribution. Those with reliable optical identifications have a redshift distribution peaking at <i>z</i>
≈ 0.25 ± 0.05, while submillimetre colours suggest that a significant fraction with no counterpart above the <i>r</i>
‐band limit have <i>z</i>
> 1. We also suggest a method for selecting populations of strongly lensed high‐redshift galaxies. Our identifications are matched to UV–NIR photometry from the GAMA survey, and these data are available as part of the <i>Herschel</i>
–ATLAS public data release.</p>
</abstract>
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<noteGroup><note xml:id="fn1"><p><i>Herschel</i>
is an ESA space observatory with science instruments provided by European‐led Principal Investigator consortia and with important participation from NASA.</p>
</note>
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<mods version="3.6"><titleInfo lang="en"><title>Herschel–ATLAS: counterparts from the ultraviolet–near‐infrared in the science demonstration phase catalogue</title>
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<titleInfo type="abbreviated" lang="en"><title>Herschel–ATLAS: counterparts</title>
</titleInfo>
<titleInfo type="alternative" contentType="CDATA" lang="en"><title>Herschel–ATLAS: counterparts from the ultraviolet–near‐infrared in the science demonstration phase catalogue★</title>
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<name type="personal"><namePart type="given">D. J. B.</namePart>
<namePart type="family">Smith</namePart>
<affiliation>Centre for Astronomy and Particle Theory, The School of Physics & Astronomy, Nottingham University, University Park Campus, Nottingham NG7 1HR</affiliation>
<affiliation>Centre for Astrophysics Research, Science & Technology Research Institute, University of Hertfordshire, Hatfield, Herts AL10 9AB</affiliation>
<affiliation>E-mail: daniel.j.b.smith@gmail.com</affiliation>
<role><roleTerm type="text">author</roleTerm>
</role>
</name>
<name type="personal"><namePart type="given">L.</namePart>
<namePart type="family">Dunne</namePart>
<affiliation>Centre for Astronomy and Particle Theory, The School of Physics & Astronomy, Nottingham University, University Park Campus, Nottingham NG7 1HR</affiliation>
<role><roleTerm type="text">author</roleTerm>
</role>
</name>
<name type="personal"><namePart type="given">S. J.</namePart>
<namePart type="family">Maddox</namePart>
<affiliation>Centre for Astronomy and Particle Theory, The School of Physics & Astronomy, Nottingham University, University Park Campus, Nottingham NG7 1HR</affiliation>
<role><roleTerm type="text">author</roleTerm>
</role>
</name>
<name type="personal"><namePart type="given">S.</namePart>
<namePart type="family">Eales</namePart>
<affiliation>School of Physics & Astronomy, Cardiff University, Queen Buildings, The Parade, Cardiff CF24 3AA</affiliation>
<role><roleTerm type="text">author</roleTerm>
</role>
</name>
<name type="personal"><namePart type="given">D. G.</namePart>
<namePart type="family">Bonfield</namePart>
<affiliation>Centre for Astrophysics Research, Science & Technology Research Institute, University of Hertfordshire, Hatfield, Herts AL10 9AB</affiliation>
<role><roleTerm type="text">author</roleTerm>
</role>
</name>
<name type="personal"><namePart type="given">M. J.</namePart>
<namePart type="family">Jarvis</namePart>
<affiliation>Centre for Astrophysics Research, Science & Technology Research Institute, University of Hertfordshire, Hatfield, Herts AL10 9AB</affiliation>
<role><roleTerm type="text">author</roleTerm>
</role>
</name>
<name type="personal"><namePart type="given">W.</namePart>
<namePart type="family">Sutherland</namePart>
<affiliation>School of Mathematical Sciences, Queen Mary, University of London, Mile End Road, London E1 4NS</affiliation>
<role><roleTerm type="text">author</roleTerm>
</role>
</name>
<name type="personal"><namePart type="given">S.</namePart>
<namePart type="family">Fleuren</namePart>
<affiliation>School of Mathematical Sciences, Queen Mary, University of London, Mile End Road, London E1 4NS</affiliation>
<role><roleTerm type="text">author</roleTerm>
</role>
</name>
<name type="personal"><namePart type="given">E. E.</namePart>
<namePart type="family">Rigby</namePart>
<affiliation>Centre for Astronomy and Particle Theory, The School of Physics & Astronomy, Nottingham University, University Park Campus, Nottingham NG7 1HR</affiliation>
<role><roleTerm type="text">author</roleTerm>
</role>
</name>
<name type="personal"><namePart type="given">M. A.</namePart>
<namePart type="family">Thompson</namePart>
<affiliation>Centre for Astrophysics Research, Science & Technology Research Institute, University of Hertfordshire, Hatfield, Herts AL10 9AB</affiliation>
<role><roleTerm type="text">author</roleTerm>
</role>
</name>
<name type="personal"><namePart type="given">I. K.</namePart>
<namePart type="family">Baldry</namePart>
<affiliation>Astrophysics Research Institute, Liverpool John Moores University, Twelve Quays House, Egerton Wharf, Birkenhead CH41 1LD</affiliation>
<role><roleTerm type="text">author</roleTerm>
</role>
</name>
<name type="personal"><namePart type="given">S.</namePart>
<namePart type="family">Bamford</namePart>
<affiliation>Centre for Astronomy and Particle Theory, The School of Physics & Astronomy, Nottingham University, University Park Campus, Nottingham NG7 1HR</affiliation>
<role><roleTerm type="text">author</roleTerm>
</role>
</name>
<name type="personal"><namePart type="given">S.</namePart>
<namePart type="family">Buttiglione</namePart>
<affiliation>INAF – Osservatorio Astronomico di Padova, Vicolo Osservatorio 5, I‐35122 Padova, Italy</affiliation>
<role><roleTerm type="text">author</roleTerm>
</role>
</name>
<name type="personal"><namePart type="given">A.</namePart>
<namePart type="family">Cava</namePart>
<affiliation>Departamento de Astrofísica, Facultad de CC. Físicas, Universidad Complutense de Madrid, E‐28040 Madrid, Spain</affiliation>
<role><roleTerm type="text">author</roleTerm>
</role>
</name>
<name type="personal"><namePart type="given">D. L.</namePart>
<namePart type="family">Clements</namePart>
<affiliation>Astrophysics Group, Imperial College London, Blackett Laboratory, Prince Consort Road, London SW7 2AZ</affiliation>
<role><roleTerm type="text">author</roleTerm>
</role>
</name>
<name type="personal"><namePart type="given">A.</namePart>
<namePart type="family">Cooray</namePart>
<affiliation>University of California, Ivine, Department of Physics & Astronomy, 4186 Frederick Reines Hall, Irvine, CA 92697‐4575, USA</affiliation>
<role><roleTerm type="text">author</roleTerm>
</role>
</name>
<name type="personal"><namePart type="given">S.</namePart>
<namePart type="family">Croom</namePart>
<affiliation>Sydney Institute for Astronomy, School of Physics, University of Sydney, NSW 2006, Australia</affiliation>
<role><roleTerm type="text">author</roleTerm>
</role>
</name>
<name type="personal"><namePart type="given">A.</namePart>
<namePart type="family">Dariush</namePart>
<affiliation>School of Physics & Astronomy, Cardiff University, Queen Buildings, The Parade, Cardiff CF24 3AA</affiliation>
<role><roleTerm type="text">author</roleTerm>
</role>
</name>
<name type="personal"><namePart type="given">G.</namePart>
<namePart type="family">de Zotti</namePart>
<affiliation>INAF – Osservatorio Astronomico di Padova, Vicolo Osservatorio 5, I‐35122 Padova, Italy</affiliation>
<affiliation>SISSA, Via Bonomea 265, I‐34136 Trieste, Italy</affiliation>
<role><roleTerm type="text">author</roleTerm>
</role>
</name>
<name type="personal"><namePart type="given">S. P.</namePart>
<namePart type="family">Driver</namePart>
<affiliation>SUPA, School of Physics and Astronomy, University of St. Andrews, North Haugh, St. Andrews KY16 9SS</affiliation>
<affiliation>International Centre for Radio Astronomy Research, The University of Western Australia, 7 Fairway, Crawley, Perth, Western Australia WA6009, Australia</affiliation>
<role><roleTerm type="text">author</roleTerm>
</role>
</name>
<name type="personal"><namePart type="given">J. S.</namePart>
<namePart type="family">Dunlop</namePart>
<affiliation>Institute for Astronomy, University of Edinburgh, Royal Observatory, Edinburgh EH9 3HJ</affiliation>
<role><roleTerm type="text">author</roleTerm>
</role>
</name>
<name type="personal"><namePart type="given">J.</namePart>
<namePart type="family">Fritz</namePart>
<affiliation>Sterrenkundig Observatorium, Universiteit Gent, Krijgslaan 281 S9, B‐9000 Gent, Belgium</affiliation>
<role><roleTerm type="text">author</roleTerm>
</role>
</name>
<name type="personal"><namePart type="given">D. T.</namePart>
<namePart type="family">Hill</namePart>
<affiliation>SUPA, School of Physics and Astronomy, University of St. Andrews, North Haugh, St. Andrews KY16 9SS</affiliation>
<role><roleTerm type="text">author</roleTerm>
</role>
</name>
<name type="personal"><namePart type="given">A.</namePart>
<namePart type="family">Hopkins</namePart>
<affiliation>Anglo‐Australian Observatory, PO Box 296, Epping, NSW 1710, Australia</affiliation>
<role><roleTerm type="text">author</roleTerm>
</role>
</name>
<name type="personal"><namePart type="given">R.</namePart>
<namePart type="family">Hopwood</namePart>
<affiliation>Department of Physics and Astronomy, The Open University, Walton Hall, Milton Keynes MK7 6AA</affiliation>
<role><roleTerm type="text">author</roleTerm>
</role>
</name>
<name type="personal"><namePart type="given">E.</namePart>
<namePart type="family">Ibar</namePart>
<affiliation>Uk Astronomy Technology Centre, Royal Observatory, Edinburgh EH9 3HJ</affiliation>
<role><roleTerm type="text">author</roleTerm>
</role>
</name>
<name type="personal"><namePart type="given">R. J.</namePart>
<namePart type="family">Ivison</namePart>
<affiliation>Institute for Astronomy, University of Edinburgh, Royal Observatory, Edinburgh EH9 3HJ</affiliation>
<affiliation>Uk Astronomy Technology Centre, Royal Observatory, Edinburgh EH9 3HJ</affiliation>
<role><roleTerm type="text">author</roleTerm>
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<name type="personal"><namePart type="given">D. H.</namePart>
<namePart type="family">Jones</namePart>
<affiliation>Anglo‐Australian Observatory, PO Box 296, Epping, NSW 1710, Australia</affiliation>
<role><roleTerm type="text">author</roleTerm>
</role>
</name>
<name type="personal"><namePart type="given">L.</namePart>
<namePart type="family">Kelvin</namePart>
<affiliation>SUPA, School of Physics and Astronomy, University of St. Andrews, North Haugh, St. Andrews KY16 9SS</affiliation>
<role><roleTerm type="text">author</roleTerm>
</role>
</name>
<name type="personal"><namePart type="given">L.</namePart>
<namePart type="family">Leeuw</namePart>
<affiliation>SETI Institute, 515 N. Whisman Avenue, Mountain View, CA 94043, USA</affiliation>
<role><roleTerm type="text">author</roleTerm>
</role>
</name>
<name type="personal"><namePart type="given">J.</namePart>
<namePart type="family">Liske</namePart>
<affiliation>European Southern Observatory, Karl‐Schwarzschild‐Strasse 2, D‐85748 Garching bei München, Germany</affiliation>
<role><roleTerm type="text">author</roleTerm>
</role>
</name>
<name type="personal"><namePart type="given">J.</namePart>
<namePart type="family">Loveday</namePart>
<affiliation>Astronomy Centre, University of Sussex, Falmer, Brighton BN1 9QH</affiliation>
<role><roleTerm type="text">author</roleTerm>
</role>
</name>
<name type="personal"><namePart type="given">B. F.</namePart>
<namePart type="family">Madore</namePart>
<affiliation>Observatories of the Carnegie Institution, 813 Santa Barbera St., Pasadena, CA 91101, USA</affiliation>
<role><roleTerm type="text">author</roleTerm>
</role>
</name>
<name type="personal"><namePart type="given">P.</namePart>
<namePart type="family">Norberg</namePart>
<affiliation>Institute for Astronomy, University of Edinburgh, Royal Observatory, Edinburgh EH9 3HJ</affiliation>
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</role>
</name>
<name type="personal"><namePart type="given">P.</namePart>
<namePart type="family">Panuzzo</namePart>
<affiliation>CEA, Laboratoire AIM, Irfu/SAp, Orme des Merisiers, F‐91191 Gif‐sur‐Yvette, France</affiliation>
<role><roleTerm type="text">author</roleTerm>
</role>
</name>
<name type="personal"><namePart type="given">E.</namePart>
<namePart type="family">Pascale</namePart>
<affiliation>School of Physics & Astronomy, Cardiff University, Queen Buildings, The Parade, Cardiff CF24 3AA</affiliation>
<role><roleTerm type="text">author</roleTerm>
</role>
</name>
<name type="personal"><namePart type="given">M.</namePart>
<namePart type="family">Pohlen</namePart>
<affiliation>School of Physics & Astronomy, Cardiff University, Queen Buildings, The Parade, Cardiff CF24 3AA</affiliation>
<role><roleTerm type="text">author</roleTerm>
</role>
</name>
<name type="personal"><namePart type="given">C. C.</namePart>
<namePart type="family">Popescu</namePart>
<affiliation>Jeremiah Horrocks Institute, University of Central Lancashire, Preston PR1 2HE</affiliation>
<role><roleTerm type="text">author</roleTerm>
</role>
</name>
<name type="personal"><namePart type="given">M.</namePart>
<namePart type="family">Prescott</namePart>
<affiliation>Astrophysics Research Institute, Liverpool John Moores University, Twelve Quays House, Egerton Wharf, Birkenhead CH41 1LD</affiliation>
<role><roleTerm type="text">author</roleTerm>
</role>
</name>
<name type="personal"><namePart type="given">A.</namePart>
<namePart type="family">Robotham</namePart>
<affiliation>SUPA, School of Physics and Astronomy, University of St. Andrews, North Haugh, St. Andrews KY16 9SS</affiliation>
<role><roleTerm type="text">author</roleTerm>
</role>
</name>
<name type="personal"><namePart type="given">G.</namePart>
<namePart type="family">Rodighiero</namePart>
<affiliation>INAF – Osservatorio Astronomico di Padova, Vicolo Osservatorio 5, I‐35122 Padova, Italy</affiliation>
<role><roleTerm type="text">author</roleTerm>
</role>
</name>
<name type="personal"><namePart type="given">D.</namePart>
<namePart type="family">Scott</namePart>
<affiliation>Department of Physics and Astronomy, 6224 Agricultural Road, University of British Columbia, Vancouver, BC V6T 1Z1, Canada</affiliation>
<role><roleTerm type="text">author</roleTerm>
</role>
</name>
<name type="personal"><namePart type="given">M.</namePart>
<namePart type="family">Seibert</namePart>
<affiliation>Observatories of the Carnegie Institution, 813 Santa Barbera St., Pasadena, CA 91101, USA</affiliation>
<role><roleTerm type="text">author</roleTerm>
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</name>
<name type="personal"><namePart type="given">R.</namePart>
<namePart type="family">Sharp</namePart>
<affiliation>Anglo‐Australian Observatory, PO Box 296, Epping, NSW 1710, Australia</affiliation>
<role><roleTerm type="text">author</roleTerm>
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<name type="personal"><namePart type="given">P.</namePart>
<namePart type="family">Temi</namePart>
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</role>
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<name type="personal"><namePart type="given">R. J.</namePart>
<namePart type="family">Tuffs</namePart>
<affiliation>Max Planck Institut für Kernphysik (MPIK), Saupfercheckweg, 69117 Heidelberg, Germany</affiliation>
<role><roleTerm type="text">author</roleTerm>
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</name>
<name type="personal"><namePart type="given">P.</namePart>
<namePart type="family">van der Werf</namePart>
<affiliation>Institute for Astronomy, University of Edinburgh, Royal Observatory, Edinburgh EH9 3HJ</affiliation>
<affiliation>Leiden Observatory, Leiden University, PO Box 9513, NL ‐ 2300 RA Leiden, the Netherlands</affiliation>
<role><roleTerm type="text">author</roleTerm>
</role>
</name>
<name type="personal"><namePart type="given">E.</namePart>
<namePart type="family">van Kampen</namePart>
<affiliation>European Southern Observatory, Karl‐Schwarzschild‐Strasse 2, D‐85748 Garching bei München, Germany</affiliation>
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<abstract lang="en">We present a technique to identify optical counterparts of 250‐μm‐selected sources from the Herschel–ATLAS survey. Of the 6621 250 μm > 32‐mJy sources in our science demonstration catalogue we find that ∼60 per cent have counterparts brighter than r = 22.4 mag in the Sloan Digital Sky Survey. Applying a likelihood ratio technique we are able to identify 2423 of the counterparts with a reliability R > 0.8. This is approximately 37 per cent of the full 250‐μm catalogue. We have estimated photometric redshifts for each of these 2423 reliable counterparts, while 1099 also have spectroscopic redshifts collated from several different sources, including the GAMA survey. We estimate the completeness of identifying counterparts as a function of redshift, and present evidence that 250‐μm‐selected Herschel–ATLAS galaxies have a bimodal redshift distribution. Those with reliable optical identifications have a redshift distribution peaking at z ≈ 0.25 ± 0.05, while submillimetre colours suggest that a significant fraction with no counterpart above the r‐band limit have z > 1. We also suggest a method for selecting populations of strongly lensed high‐redshift galaxies. Our identifications are matched to UV–NIR photometry from the GAMA survey, and these data are available as part of the Herschel–ATLAS public data release.</abstract>
<note type="content">*Herschel is an ESA space observatory with science instruments provided by European‐led Principal Investigator consortia and with important participation from NASA.</note>
<subject lang="en"><genre>keywords</genre>
<topic>methods: statistical</topic>
<topic>submillimetre: galaxies</topic>
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