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Vieira, J. E. Aguirre, J. Fritz, J. Glenn, J. J. Bock, J. Kamenetzky, J. Zmuidzinas, K. S. Scott, L. Dunne, L. Leeuw, M. J. Jarvis, M. Negrello, M. Pohlen, M. Thompson, P. R. Maloney, P. Temi, R. Auld, R. E. Lupu, R. J. Ivison, S. Buttiglione, S. Dye, S. Eales, S. Kim, S. Maddox, S. Serjeant","submitted_at":"2010-09-29T19:38:04Z","abstract_excerpt":"We present new observations from Z-Spec, a broadband 185-305 GHz spectrometer, of five sub-millimeter bright lensed sources selected from the Herschel Astrophysical Terahertz Large Area Survey (H-ATLAS) science demonstration phase (SDP) catalog. We construct a redshift finding algorithm using combinations of the signal-to-noise of all the lines falling in the Z-Spec bandpass to determine redshifts with high confidence, even in cases where the signal-to-noise in individual lines is low. We measure the dust continuum in all sources and secure CO redshifts for four out of five (z~1.5-3). 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