A Photometric Study of the Supercluster MS0302 with the UH8K CCD Camera: Image Processing and Object Catalogs

摘要

We describe in detail the processing of a set of images of the z = 0.42supercluster MS0302 taken with the UH8K camera at CFHT. The result of this is apair of seamless combined V- and I-band images of the field, along with acharacterization of the noise properties and of the point spread function(PSF), and catalogs of about 30,000 faint galaxies. The analysis involves thefollowing steps: image preparation; detection of stars and registration to findthe transformation from detector to sky coordinates; correction for extinctionand/or gain variations; modeling of the PSF; generation of images with acircular PSF; image warping and averaging; modeling of the noiseauto-correlation function; faint object detection, aperture photometry, andshape measurement. The shear analysis is described elsewhere.