AzTEC Millimetre Survey of the COSMOS Field: I. Data Reduction and Source Catalogue

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dc.creatorScott, K. S.
dc.creatorAustermann, J. E.
dc.creatorPerera, T. A.
dc.creatorWilson, G. W.
dc.creatorAretxaga, I.
dc.creatorBock, J. J.
dc.creatorHughes, D. H.
dc.creatorKang, Y.
dc.creatorKim, S.
dc.creatorMauskopf, P. D.
dc.creatorSanders, D. B.
dc.creatorScoville, N.
dc.creatorYun, M. S.
dc.date2008-01-17
dc.date.accessioned2026-07-07T09:36:19Z
dc.date.available2026-07-07T09:36:19Z
dc.descriptionWe present a 1.1 mm wavelength imaging survey covering 0.3 sq. deg. in the COSMOS field. These data, obtained with the AzTEC continuum camera on the James Clerk Maxwell Telescope (JCMT), were centred on a prominent large-scale structure over-density which includes a rich X-ray cluster at z = 0.73. A total of 50 millimetre galaxy candidates, with a significance ranging from 3.5-8.5 sigma, are extracted from the central 0.15 sq. deg. area which has a uniform sensitivity of 1.3 mJy/beam. Sixteen sources are detected with S/N > 4.5, where the expected false-detection rate is zero, of which a surprisingly large number (9) have intrinsic (de-boosted) fluxes > 5 mJy at 1.1 mm. Assuming the emission is dominated by radiation from dust, heated by a massive population of young, optically-obscured stars, then these bright AzTEC sources have FIR luminosities > 6 x 10^12 L(sun) and star formation-rates > 1100 M(sun)/yr. Two of these nine bright AzTEC sources are found towards the extreme peripheral region of the X-ray cluster, whilst the remainder are distributed across the larger-scale over-density. We describe the AzTEC data reduction pipeline, the source-extraction algorithm, and the characterisation of the source catalogue, including the completeness, flux de-boosting correction, false-detection rate and the source positional uncertainty, through an extensive set of Monte-Carlo simulations. We conclude with a preliminary comparison, via a stacked analysis, of the overlapping MIPS 24 micron data and radio data with this AzTEC map of the COSMOS field.
dc.description16 pages, 12 figures, 2 tables, accepted for publication in MNRAS
dc.identifierhttps://arxiv.org/abs/0801.2779
dc.identifierhttp://arxiv.org/abs/0801.2779
dc.identifierMNRAS, Vol 385, Issue 4, 2225-2238, 2008
dc.identifierdoi:10.1111/j.1365-2966.2008.12989.x
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/160081
dc.subjectAstrophysics
dc.titleAzTEC Millimetre Survey of the COSMOS Field: I. Data Reduction and Source Catalogue
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