AzTEC Millimetre Survey of the COSMOS Field: I. Data Reduction and Source Catalogue
K. S. Scott (1), J. E. Austermann (1), T. A. Perera (1), G. W. Wilson, (1), I. Aretxaga (2), J. J. Bock (3), D. H. Hughes (2), Y. Kang (4), S. Kim, (4), P. D. Mauskopf (5), D. B. Sanders (6), N. Scoville (7), and M. S. Yun, (1) ((1) University of Massachusetts

TL;DR
This paper presents a detailed 1.1 mm survey of the COSMOS field using AzTEC on JCMT, identifying 50 millimetre galaxy candidates, analyzing their properties, and describing the data reduction and source cataloging methods.
Contribution
It introduces a new millimetre survey of the COSMOS field, including data reduction pipeline, source extraction, and a comprehensive source catalog with flux and positional analysis.
Findings
50 galaxy candidates detected with high significance
Nine sources have fluxes > 5 mJy, indicating high FIR luminosities and star formation rates
Distribution of sources suggests association with large-scale structure and cluster environment
Abstract
We 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…
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