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Optical/Near-Infrared Observations of GRO J1744-28
D. M. Cole, D. E. Vanden Berk, S. A. Severson +8
We present results from a series of optical (g and r-band) and near-infrared (K'-band) observations of the region of the sky including the entire XTE and ROSAT error circles for th…
High-Redshift Superclustering of QSO Absorption Line Systems on 100 Mpc Scales
Jean M. Quashnock, Daniel E. Vanden Berk, Donald G. York
We have analyzed the clustering of C IV absorption line systems in an extensive new catalog of heavy element QSO absorbers. The catalog permits exploration of clustering over a lar…
An Excess of C IV Absorbers in Luminous QSOs: Evidence for Gravitational Lensing?
Daniel E. Vanden Berk, Jean M. Quashnock, Donald G. York +1
We have compiled a new and extensive catalog of heavy-element QSO absorption line systems and analyzed the distribution of absorbers in bright and faint QSOs, to search for gravita…