Herschel-ATLAS: Counterparts from the ultraviolet-near-infrared in the science demonstration phase catalogue

Daniel Smith; L. Dunne; S. J. Maddox; S. Eales; D. G. Bonfield; M.J. Jarvis; W. Sutherland; S. Fleuren; E. E. Rigby; Mark 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 Kampen

doi:10.1111/j.1365-2966.2011.18827.x

Herschel-ATLAS: Counterparts from the ultraviolet-near-infrared in the science demonstration phase catalogue

Daniel Smith, L. Dunne, S. J. Maddox, S. Eales, D. G. Bonfield, M.J. Jarvis, W. Sutherland, S. Fleuren, E. E. Rigby, Mark Thompson, I.K. Baldry, S. Bamford, S. Buttiglione, A. Cava, D. L. Clements, A. Cooray, S. Croom, A. Dariush, G. de Zotti, S. P. DriverJ.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 Kampen

Centre for Astrophysics Research (CAR)

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Abstract

We present a technique to identify optical counterparts of 250-mu m-selected sources from the Herschel-ATLAS survey. Of the 6621 250 mu m > 32-mJy sources in our science demonstration catalogue we find that similar to 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-mu 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-mu m-selected Herschel-ATLAS galaxies have a bimodal redshift distribution. Those with reliable optical identifications have a redshift distribution peaking at z approximate to 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.

Original language	English
Pages (from-to)	857-872
Number of pages	16
Journal	Monthly Notices of the Royal Astronomical Society
Volume	416
Issue number	2
DOIs	https://doi.org/10.1111/j.1365-2966.2011.18827.x
Publication status	Published - Sept 2011

Keywords

methods: statistical
submillimetre: galaxies

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10.1111/j.1365-2966.2011.18827.x

905873
The definitive version can be found at: http://onlinelibrary.wiley.com/ Copyright Royal Astronomical Society
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Smith, D., Dunne, L., Maddox, S. J., Eales, S., Bonfield, D. G., Jarvis, M. J., Sutherland, W., Fleuren, S., Rigby, E. E., Thompson, M., Baldry, I. K., Bamford, S., Buttiglione, S., Cava, A., Clements, D. L., Cooray, A., Croom, S., Dariush, A., de Zotti, G., ... van Kampen, E. (2011). Herschel-ATLAS: Counterparts from the ultraviolet-near-infrared in the science demonstration phase catalogue. Monthly Notices of the Royal Astronomical Society, 416(2), 857-872. https://doi.org/10.1111/j.1365-2966.2011.18827.x

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title = "Herschel-ATLAS: Counterparts from the ultraviolet-near-infrared in the science demonstration phase catalogue",

abstract = "We present a technique to identify optical counterparts of 250-mu m-selected sources from the Herschel-ATLAS survey. Of the 6621 250 mu m > 32-mJy sources in our science demonstration catalogue we find that similar to 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-mu 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-mu m-selected Herschel-ATLAS galaxies have a bimodal redshift distribution. Those with reliable optical identifications have a redshift distribution peaking at z approximate to 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.",

keywords = "methods: statistical, submillimetre: galaxies",

author = "Daniel Smith and L. Dunne and Maddox, {S. J.} and S. Eales and Bonfield, {D. G.} and M.J. Jarvis and W. Sutherland and S. Fleuren and Rigby, {E. E.} and Mark Thompson and I.K. Baldry and S. Bamford and S. Buttiglione and A. Cava and Clements, {D. L.} and A. Cooray and S. Croom and A. Dariush and {de Zotti}, G. and Driver, {S. P.} and J.S. Dunlop and J. Fritz and Hill, {D. T.} and A. Hopkins and R. Hopwood and E. Ibar and R.J. Ivison and Jones, {D. H.} and L. Kelvin and L. Leeuw and J. Liske and J. Loveday and Madore, {B. F.} and P. Norberg and P. Panuzzo and E. Pascale and M. Pohlen and Popescu, {C. C.} and M. Prescott and A. Robotham and G. Rodighiero and D. Scott and M. Seibert and R. Sharp and P. Temi and Tuffs, {R. J.} and {van der Werf}, P. and {van Kampen}, E.",

note = "The definitive version can be found at: http://onlinelibrary.wiley.com/ Copyright Royal Astronomical Society",

year = "2011",

month = sep,

doi = "10.1111/j.1365-2966.2011.18827.x",

language = "English",

volume = "416",

pages = "857--872",

journal = "Monthly Notices of the Royal Astronomical Society",

issn = "0035-8711",

publisher = "Oxford University Press (OUP)",

number = "2",

}

Smith, D, Dunne, L, Maddox, SJ, Eales, S, Bonfield, DG, Jarvis, MJ, Sutherland, W, Fleuren, S, Rigby, EE, Thompson, M, Baldry, IK, Bamford, S, Buttiglione, S, Cava, A, Clements, DL, Cooray, A, Croom, S, Dariush, A, de Zotti, G, Driver, SP, Dunlop, JS, Fritz, J, Hill, DT, Hopkins, A, Hopwood, R, Ibar, E, Ivison, RJ, Jones, DH, Kelvin, L, Leeuw, L, Liske, J, Loveday, J, Madore, BF, Norberg, P, Panuzzo, P, Pascale, E, Pohlen, M, Popescu, CC, Prescott, M, Robotham, A, Rodighiero, G, Scott, D, Seibert, M, Sharp, R, Temi, P, Tuffs, RJ, van der Werf, P & van Kampen, E 2011, 'Herschel-ATLAS: Counterparts from the ultraviolet-near-infrared in the science demonstration phase catalogue', Monthly Notices of the Royal Astronomical Society, vol. 416, no. 2, pp. 857-872. https://doi.org/10.1111/j.1365-2966.2011.18827.x

TY - JOUR

T1 - Herschel-ATLAS

T2 - Counterparts from the ultraviolet-near-infrared in the science demonstration phase catalogue

AU - Smith, Daniel

AU - Dunne, L.

AU - Maddox, S. J.

AU - Eales, S.

AU - Bonfield, D. G.

AU - Jarvis, M.J.

AU - Sutherland, W.

AU - Fleuren, S.

AU - Rigby, E. E.

AU - Thompson, Mark

AU - Baldry, I.K.

AU - Bamford, S.

AU - Buttiglione, S.

AU - Cava, A.

AU - Clements, D. L.

AU - Cooray, A.

AU - Croom, S.

AU - Dariush, A.

AU - de Zotti, G.

AU - Driver, S. P.

AU - Dunlop, J.S.

AU - Fritz, J.

AU - Hill, D. T.

AU - Hopkins, A.

AU - Hopwood, R.

AU - Ibar, E.

AU - Ivison, R.J.

AU - Jones, D. H.

AU - Kelvin, L.

AU - Leeuw, L.

AU - Liske, J.

AU - Loveday, J.

AU - Madore, B. F.

AU - Norberg, P.

AU - Panuzzo, P.

AU - Pascale, E.

AU - Pohlen, M.

AU - Popescu, C. C.

AU - Prescott, M.

AU - Robotham, A.

AU - Rodighiero, G.

AU - Scott, D.

AU - Seibert, M.

AU - Sharp, R.

AU - Temi, P.

AU - Tuffs, R. J.

AU - van der Werf, P.

AU - van Kampen, E.

N1 - The definitive version can be found at: http://onlinelibrary.wiley.com/ Copyright Royal Astronomical Society

PY - 2011/9

Y1 - 2011/9

N2 - We present a technique to identify optical counterparts of 250-mu m-selected sources from the Herschel-ATLAS survey. Of the 6621 250 mu m > 32-mJy sources in our science demonstration catalogue we find that similar to 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-mu 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-mu m-selected Herschel-ATLAS galaxies have a bimodal redshift distribution. Those with reliable optical identifications have a redshift distribution peaking at z approximate to 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.

AB - We present a technique to identify optical counterparts of 250-mu m-selected sources from the Herschel-ATLAS survey. Of the 6621 250 mu m > 32-mJy sources in our science demonstration catalogue we find that similar to 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-mu 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-mu m-selected Herschel-ATLAS galaxies have a bimodal redshift distribution. Those with reliable optical identifications have a redshift distribution peaking at z approximate to 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.

KW - methods: statistical

KW - submillimetre: galaxies

UR - http://www.scopus.com/inward/record.url?partnerID=yv4JPVwI&eid=2-s2.0-80052372190&md5=c42269518c9e5ea744f8dc50c7326e29

U2 - 10.1111/j.1365-2966.2011.18827.x

DO - 10.1111/j.1365-2966.2011.18827.x

M3 - Article

SN - 0035-8711

VL - 416

SP - 857

EP - 872

JO - Monthly Notices of the Royal Astronomical Society

JF - Monthly Notices of the Royal Astronomical Society

IS - 2

ER -

Herschel-ATLAS: Counterparts from the ultraviolet-near-infrared in the science demonstration phase catalogue

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