The Herschel-ATLAS data release 1: II. Multi-wavelength counterparts to submillimetre sources
This paper is the second in a pair of papers presenting data release 1 (DR1) of the Herschel Astrophysical Terahertz Large Area Survey (H-ATLAS), the largest single open-time key project carried out with the HerschelSpace Observatory. The H-ATLAS is a wide-area imaging survey carried out in five pho...
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Oxford University Press
2016
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| Online Access: | https://eprints.nottingham.ac.uk/42358/ |
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| author | Bourne, N. Dunne, L. Maddox, S.J. Dye, S. Furlanetto, C. Hoyos, Carlos Smith, D.J.B. Eales, S. Smith, M.W.L. Valiante, E. Alpaslan, M. Andrae, E. Baldry, I.K. Cluver, M.E. Cooray, A. Driver, S.P. Dunlop, J.S. Grootes, M.W. Ivison, R.J. Jarrett, Tom Liske, J. Madore, B.F. Popescu, C.C. Robotham, A.G. Rowlands, K. Seibert, M. Thompson, M.A. Tuffs, Richard J. Viaene, S. Wright, A.H. |
| author_facet | Bourne, N. Dunne, L. Maddox, S.J. Dye, S. Furlanetto, C. Hoyos, Carlos Smith, D.J.B. Eales, S. Smith, M.W.L. Valiante, E. Alpaslan, M. Andrae, E. Baldry, I.K. Cluver, M.E. Cooray, A. Driver, S.P. Dunlop, J.S. Grootes, M.W. Ivison, R.J. Jarrett, Tom Liske, J. Madore, B.F. Popescu, C.C. Robotham, A.G. Rowlands, K. Seibert, M. Thompson, M.A. Tuffs, Richard J. Viaene, S. Wright, A.H. |
| author_sort | Bourne, N. |
| building | Nottingham Research Data Repository |
| collection | Online Access |
| description | This paper is the second in a pair of papers presenting data release 1 (DR1) of the Herschel Astrophysical Terahertz Large Area Survey (H-ATLAS), the largest single open-time key project carried out with the HerschelSpace Observatory. The H-ATLAS is a wide-area imaging survey carried out in five photometric bands at 100, 160, 250, 350 and 500 μm covering a total area of 600 deg2. In this paper, we describe the identification of optical counterparts to submillimetre sources in DR1, comprising an area of 161 deg2 over three equatorial fields of roughly 12 × 4.5 deg centred at 9h, 12h and 14 h.5, respectively. Of all the H-ATLAS fields, the equatorial regions benefit from the greatest overlap with current multi-wavelength surveys spanning ultraviolet (UV) to mid-infrared regimes, as well as extensive spectroscopic coverage. We use a likelihood ratio technique to identify Sloan Digital Sky Survey counterparts at r < 22.4 for 250-μm-selected sources detected at ≥4σ (≈28 mJy). We find ‘reliable’ counterparts (reliability R ≥ 0.8) for 44 835 sources (39 per cent), with an estimated completeness of 73.0 per cent and contamination rate of 4.7 per cent. Using redshifts and multi-wavelength photometry from GAMA and other public catalogues, we show that H-ATLAS-selected galaxies at z < 0.5 span a wide range of optical colours, total infrared (IR) luminosities and IR/UV ratios, with no strong disposition towards mid-IR-classified active galactic nuclei in comparison with optical selection. The data described herein, together with all maps and catalogues described in the companion paper, are available from the H-ATLAS website at www.h-atlas.org. |
| first_indexed | 2025-11-14T19:48:30Z |
| format | Article |
| id | nottingham-42358 |
| institution | University of Nottingham Malaysia Campus |
| institution_category | Local University |
| last_indexed | 2025-11-14T19:48:30Z |
| publishDate | 2016 |
| publisher | Oxford University Press |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | nottingham-423582020-05-04T18:02:06Z https://eprints.nottingham.ac.uk/42358/ The Herschel-ATLAS data release 1: II. Multi-wavelength counterparts to submillimetre sources Bourne, N. Dunne, L. Maddox, S.J. Dye, S. Furlanetto, C. Hoyos, Carlos Smith, D.J.B. Eales, S. Smith, M.W.L. Valiante, E. Alpaslan, M. Andrae, E. Baldry, I.K. Cluver, M.E. Cooray, A. Driver, S.P. Dunlop, J.S. Grootes, M.W. Ivison, R.J. Jarrett, Tom Liske, J. Madore, B.F. Popescu, C.C. Robotham, A.G. Rowlands, K. Seibert, M. Thompson, M.A. Tuffs, Richard J. Viaene, S. Wright, A.H. This paper is the second in a pair of papers presenting data release 1 (DR1) of the Herschel Astrophysical Terahertz Large Area Survey (H-ATLAS), the largest single open-time key project carried out with the HerschelSpace Observatory. The H-ATLAS is a wide-area imaging survey carried out in five photometric bands at 100, 160, 250, 350 and 500 μm covering a total area of 600 deg2. In this paper, we describe the identification of optical counterparts to submillimetre sources in DR1, comprising an area of 161 deg2 over three equatorial fields of roughly 12 × 4.5 deg centred at 9h, 12h and 14 h.5, respectively. Of all the H-ATLAS fields, the equatorial regions benefit from the greatest overlap with current multi-wavelength surveys spanning ultraviolet (UV) to mid-infrared regimes, as well as extensive spectroscopic coverage. We use a likelihood ratio technique to identify Sloan Digital Sky Survey counterparts at r < 22.4 for 250-μm-selected sources detected at ≥4σ (≈28 mJy). We find ‘reliable’ counterparts (reliability R ≥ 0.8) for 44 835 sources (39 per cent), with an estimated completeness of 73.0 per cent and contamination rate of 4.7 per cent. Using redshifts and multi-wavelength photometry from GAMA and other public catalogues, we show that H-ATLAS-selected galaxies at z < 0.5 span a wide range of optical colours, total infrared (IR) luminosities and IR/UV ratios, with no strong disposition towards mid-IR-classified active galactic nuclei in comparison with optical selection. The data described herein, together with all maps and catalogues described in the companion paper, are available from the H-ATLAS website at www.h-atlas.org. Oxford University Press 2016-07-11 Article PeerReviewed Bourne, N., Dunne, L., Maddox, S.J., Dye, S., Furlanetto, C., Hoyos, Carlos, Smith, D.J.B., Eales, S., Smith, M.W.L., Valiante, E., Alpaslan, M., Andrae, E., Baldry, I.K., Cluver, M.E., Cooray, A., Driver, S.P., Dunlop, J.S., Grootes, M.W., Ivison, R.J., Jarrett, Tom, Liske, J., Madore, B.F., Popescu, C.C., Robotham, A.G., Rowlands, K., Seibert, M., Thompson, M.A., Tuffs, Richard J., Viaene, S. and Wright, A.H. (2016) The Herschel-ATLAS data release 1: II. Multi-wavelength counterparts to submillimetre sources. Monthly Notices of the Royal Astronomical Society, 462 (2). pp. 1714-1734. ISSN 1365-2966 Methods: statistical Catalogues Submillimetre: galaxies Submillimetre: stars https://doi.org/10.1093/mnras/stw1654 doi:10.1093/mnras/stw1654 doi:10.1093/mnras/stw1654 |
| spellingShingle | Methods: statistical Catalogues Submillimetre: galaxies Submillimetre: stars Bourne, N. Dunne, L. Maddox, S.J. Dye, S. Furlanetto, C. Hoyos, Carlos Smith, D.J.B. Eales, S. Smith, M.W.L. Valiante, E. Alpaslan, M. Andrae, E. Baldry, I.K. Cluver, M.E. Cooray, A. Driver, S.P. Dunlop, J.S. Grootes, M.W. Ivison, R.J. Jarrett, Tom Liske, J. Madore, B.F. Popescu, C.C. Robotham, A.G. Rowlands, K. Seibert, M. Thompson, M.A. Tuffs, Richard J. Viaene, S. Wright, A.H. The Herschel-ATLAS data release 1: II. Multi-wavelength counterparts to submillimetre sources |
| title | The Herschel-ATLAS data release 1: II. Multi-wavelength counterparts to submillimetre sources |
| title_full | The Herschel-ATLAS data release 1: II. Multi-wavelength counterparts to submillimetre sources |
| title_fullStr | The Herschel-ATLAS data release 1: II. Multi-wavelength counterparts to submillimetre sources |
| title_full_unstemmed | The Herschel-ATLAS data release 1: II. Multi-wavelength counterparts to submillimetre sources |
| title_short | The Herschel-ATLAS data release 1: II. Multi-wavelength counterparts to submillimetre sources |
| title_sort | herschel-atlas data release 1: ii. multi-wavelength counterparts to submillimetre sources |
| topic | Methods: statistical Catalogues Submillimetre: galaxies Submillimetre: stars |
| url | https://eprints.nottingham.ac.uk/42358/ https://eprints.nottingham.ac.uk/42358/ https://eprints.nottingham.ac.uk/42358/ |