The Herschel-ATLAS: a sample of 500 μm-selected lensed galaxies over 600 deg2
- Negrello, M.
- Amber, S.
- Amvrosiadis, A.
- Cai, Z.-Y.
- Lapi, A.
- Gonzalez-Nuevo, J.
- De Zotti, G.
- Furlanetto, C.
- Maddox, S. J.
- Allen, M.
- Bakx, T.
- Bussmann, R. S.
- Cooray, A.
- Covone, G.
- Danese, L.
- Dannerbauer, H.
- Fu, H.
- Greenslade, J.
- Gurwell, M.
- Hopwood, R.
- Koopmans, L. V. E.
- Napolitano, N.
- Nayyeri, H.
- Omont, A.
- Petrillo, C. E.
- Riechers, D. A.
- Serjeant, S.
- Tortora, C.
- Valiante, E.
- Verdoes Kleijn, G.
- Vernardos, G.
- Wardlow, J. L.
- Baes, M.
- Baker, A. J.
- Bourne, N.
- Clements, D.
- Crawford, S. M.
- Dye, S.
- Dunne, L.
- Eales, S.
- Ivison, R. J.
- Marchetti, L.
- Michałowski, M. J.
- Smith, M. W. L.
- Vaccari, M.
- van der Werf, P.
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DOIAbstract
We present a sample of 80 candidate strongly lensed galaxies with flux density above 100 mJy at 500 μm extracted from the Herschel Astrophysical Terahertz Large Area Survey, over an area of 600 deg2. Available imaging and spectroscopic data allow us to confirm the strong lensing in 20 cases and to reject it in one case. For other eight objects, the lensing scenario is strongly supported by the presence of two sources along the same line of sight with distinct photometric redshifts. The remaining objects await more follow-up observations to confirm their nature. The lenses and the background sources have median redshifts zL = 0.6 and zS = 2.5, respectively, and are observed out to zL = 1.2 and zS = 4.2. We measure the number counts of candid...