The CNOC Cluster Redshift Survey Catalogs. I. Observational Strategy and Data Reduction Techniques

Abstract

view Abstract Citations (205) References (30) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS The CNOC Cluster Redshift Survey Catalogs. I. Observational Strategy and Data Reduction Techniques Yee, H. K. C. ; Ellingson, E. ; Carlberg, R. G. Abstract We describe in detail the observational and data reduction techniques of a large redshift survey using multiobject spectroscopy designed to obtain ~2600 faint galaxy redshifts in fields of 16 rich clusters of galaxies with redshifts between 0.2 and 0.55. The primary goal of the survey is to establish whether the mass-to-light ratio of clusters rises with distance from the cluster center. To maximize multiplexing capability, we use ~1500 A wide band-limiting filters matched to the major features of spectra of galaxies at the cluster redshifts to allow for multitiering of spectra. Typically 80-110 spectra can be observed using a single slit mask. The area covered for each cluster ranges from about 1.5 h_100_^-1^ Mpc squared to 1.5 h_100_^-1^ Mpc x 6 h_100_^-1^ Mpc. We describe the observing procedure, which involves real-time photometry and computer-based mask design and mask fabrication on site, allowing for the efficient use of telescope time. The spectroscopic data are extracted semiautomatically, and redshift measurement is performed using cross-correlation techniques. A detailed discussion of the determination of the completeness of the final redshift sample as functions of magnitude, color, geometric position, and redshift is also presented. Publication: The Astrophysical Journal Supplement Series Pub Date: February 1996 DOI: 10.1086/192259 Bibcode: 1996ApJS..102..269Y Keywords: GALAXIES: CLUSTERS: GENERAL; GALAXIES: DISTANCES AND REDSHIFTS; INSTRUMENTATION: SPECTROGRAPHS; SURVEYS full text sources ADS | data products NED (16) SIMBAD (15) Related Materials (5) Part 2: 1996ApJS..102..289Y Part 3: 1997ApJS..113....1E Part 4: 1998ApJS..116..211Y Part 5: 1998ApJS..116..231A Part 6: 1998ApJS..116..247E