4 papers
A Measurement of the Three-Dimensional Clustering of C IV Absorption-Line Systems on Scales of 5 to 300 Mpc
Ji Meng Loh, Jean M. Quashnock, Michael L. Stein
We examine the three-dimensional clustering of C IV absorption-line systems, using an extensive catalog of QSO heavy-element absorbers drawn from the literature. We measure cluster…
Estimating the K-function of a point process with an application to cosmology
Michael L. Stein, Jean M. Quashnock, Ji Meng Loh
Motivated by the study of an important data set for understanding the large-scale structure of the universe, this work considers the estimation of the reduced second moment functio…
The Clustering of C IV and Mg II Absorption-Line Systems
Jean M. Quashnock, Daniel E. Vanden Berk
We have analyzed the clustering of C IV and Mg II absorption-line systems on comoving scales from 1 to 16 \hMpc, using an extensive catalog of heavy-element QSO absorbers with mean…
A Constraint on the Distance Scale to Cosmological Gamma--Ray Bursts
Jean M. Quashnock
If gamma-ray bursts have a cosmological origin, the sources are expected to trace the large-scale structure of luminous matter in the universe. I use a new likelihood method that c…