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The Discovery of a High-redshift Quasar without Emission Lines from Sloan Digital Sky Survey Commissioning Data
SDSS Collaboration, Xiaohui Fan
We report observations of a luminous unresolved object at redshift z = 4.62, with a featureless optical spectrum redward of the Lyman alpha forest region, discovered from Sloan Dig…
Quasar-Marked Protoclusters and Biased Galaxy Formation
S. G. Djorgovski, S. C. Odewahn, R. R. Gal +2
We report on the current status of our search for protoclusters around quasars at z > 4. While the search is still very incomplete, clustered companion galaxies are found in virtua…
Evolution in the Clustering of Galaxies for Z < 1
Robert J. Brunner, Andrew J. Connolly, Alex S. Szalay
Measuring the evolution in the clustering of galaxies over a large redshift range is a challenging problem. For a two-dimensional galaxy catalog, however, we can measure the galaxy…
Photometric Redshifts for DPOSS Galaxy Clusters at z<0.4
R. R. Gal, S. C. Odewahn, S. G. Djorgovski +2
We report on the creation of an unbiased catalog of galaxy clusters from the galaxy catalogs derived from the digitized POSS-II (DPOSS). Utilizing the g-r color information, we sho…