Optimizing AzTEC Data Reduction for Extracting Point-like Objects

Details Optimizing AzTEC Data Reduction for Extracting Point-like Objects Optimizing AzTEC Data Reduction for Extracting Point-like Objects

Dec 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006aas...209.8302p&link_type=abstract

2007 AAS/AAPT Joint Meeting, American Astronomical Society Meeting 209, #83.02; Bulletin of the American Astronomical Society, V

Astronomy and Astrophysics

Astronomy

Scientific paper

Because of its 1.1-mm observing band and 18 arcsecond FWHM angular resolution, the AzTEC instrument is well suited for conducting untargeted surveys of high-redshift sub-mm galaxies. For such surveys, which comprise the majority of 2005/2006 observations, data reduction methods as well as observing strategies were tailored to maximize sensitivity to point sources. We describe first the choice of aggressive observing strategies that allowed us to map large areas of sky at high sensitivity (about 1 square degree overall with 1 mJy flux limit). Then we briefly outline the method used for removal/mitigation of atmospheric and instrumental drifts from time-stream data as well as a time and memory efficient pipeline for eventually combining the results of several observations into one map. Finally, we describe a quick filtering technique for reliably extracting point-source fluxes and their uncertainties.

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