The SDSS Southern Survey Coadd Data

Details The SDSS Southern Survey Coadd Data The SDSS Southern Survey Coadd Data

Dec 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006aas...20921509a&link_type=abstract

2007 AAS/AAPT Joint Meeting, American Astronomical Society Meeting 209, #215.09; Bulletin of the American Astronomical Society,

Astronomy and Astrophysics

Astronomy

4

Scientific paper

We present details of the construction and characterization of the SDSS Southern Survey. This survey consists of 300 sq-degrees of repeated scanning by the SDSS camera over -60 < RA < 60 on the equator. Each piece of sky has 20-30 images contributing and we will reach 2 magnitudes fainter than the SDSS single pass data. By using the repeated standard SDSS calibration, the apache wheel based ubercalibration, and the repeat scans themselves we obtain 1% photometry. We discuss the image coaddition techniques, the PSF construction, and the object measurement using frames of the SDSS PHOTO pipeline. Of interest is the fact that production occurred on the Open Science Grid using hundreds of compute nodes on >10 Terabytes of data. We present star counts, galaxy counts, the galaxy two-pt correlation function, and a photo-z distribution as the base characterization of the data set and we discuss the opportunities for using the dataset to extend the SDSS optical cluster catalog work out to redshifts of z > 0.5.

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