Jean M. Quashnock

A Cross-Correlation Analysis of Mg II Absorption Line Systems and Luminous Red Galaxies from the SDSS DR5 (2009)

Lundgren, Britt F., Brunner, Robert J., York, Donald G., Ross, Ashley J., Quashnock, Jean M., Myers, Adam D., ...

We analyze the cross-correlation of 2,705 unambiguously intervening Mg II (2796,2803A) quasar absorption line systems with 1,495,604 luminous red galaxies (LRGs) from the Fifth Data Release of the...

LIKELIHOOD ANALYSIS OF REPEATING IN THE BATSE CATALOGUE (2007)

Jean M. Quashnock

Abstract. I describe a new likelihood technique, based on counts-in-cells statistics, that I use to analyze repeating in the BATSE 1B and 2B catalogues. Using the 1B data, I find that repeating is...

Estimating the $K$ function of a point process with an application to cosmology (2000)

Loh, Ji Meng, Quashnock, Jean M., Stein, Michael L.

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 function, or $K$ function,...

A Measurement of the Three-Dimensional Clustering of C IV Absorption-Line Systems on Scales of 5 to 300 Mpc (2000)

Loh, Ji Meng, Quashnock, Jean M., Stein, Michael L.

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 clustering by a...

Estimating the K-function of a point process with an application to cosmology (2000)

Stein, Michael L., Quashnock, Jean M., Loh, Ji Meng

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 function, or K-function,...

Gravitational Lensing and the Hubble Deep Field (1998)

Cooray, Asantha R., Quashnock, Jean M., Miller, M. Coleman

We calculate the expected number of multiply-imaged galaxies in the Hubble Deep Field (HDF), using photometric redshift information for galaxies with m_I < 27 that were detected in all four HDF...

Cluster-Cluster Strong Lensing: Expectations and Detection Methods (1998)

Cooray, Asantha R., Holder, Gilbert P., Quashnock, Jean M.

We calculate the all-sky number of galaxy clusters that are expected to be gravitationally lensed by foreground massive clusters. We describe the redshift and number distributions of clusters using a...

A New Measure of the Clustering of QSO Heavy-Element Absorption-Line Systems (1998)

Quashnock, Jean M., Stein, Michael L.

We examine the line-of-sight clustering of QSO heavy-element absorption-line systems, using a new measure of clustering, called the reduced second moment measure, that directly measures the mean...

A Lower Limit on Omega-Lambda Using Gravitational Lensing in the Hubble Deep Field (1998)

Cooray, Asantha R., Quashnock, Jean M., Miller, M. Coleman

We calculate the expected number of multiply-imaged galaxies in the Hubble Deep Field (HDF), using photometric redshift information for galaxies with $m_I < 27$ that were detected in all four HDF...

Optical and Near Infrared Observations of the Afterglow of GRB 980329 from 15 Hours to 10 Days (1998)

Reichart, Daniel E., Lamb, Donald Q., Metzger, Mark R., Quashnock, Jean M., Cole, David M., Castander, Francisco J., ...

We report I-band observations of the GRB 980329 field made on March 29 with the 1.34-m Tautenberg Schmidt telescope, R-, J- and K-band observations made on April 1 with the APO 3.5-m telescope, R-...

Gravitational Lensing Limits on the Average Redshift of Gamma-Ray Bursts (1998)

Holz, Daniel E., Miller, M. Coleman, Quashnock, Jean M.

The lack of bright host galaxies in several recently examined gamma-ray burst (GRB) error boxes suggests that the redshifts of cosmological GRBs may be significantly higher than previously believed....

Are The Four Gamma-Ray Bursts of 1996 October 27-29 Due to Repetition of a Single Source? (1998)

Graziani, Carlo, Lamb, Donald Q., Quashnock, Jean M.

BATSE, Ulysses, and TGRS and KONUS on WIND detected four gamma-ray events within 1.8 days during 1996 October 27-29, consistent with coming from the same location on the sky. We assess the evidence...

The Clustering of C IV and Mg II Absorption-Line Systems (1997)

Quashnock, Jean M., Berk, Daniel E. Vanden

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 redshift 2.2 (C...

The Form and Evolution of the Clustering of QSO Heavy-Element Absorption-Line Systems (1997)

Quashnock, Jean M., Berk, Daniel E. Vanden

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 redshift 2.2 (C...

High-Redshift Superclustering of QSO Absorption Line Systems on 100 Mpc Scales (1996)

Quashnock, Jean M., Berk, Daniel E. Vanden, York, Donald G.

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 large range in both...

An Excess of C IV Absorbers in Luminous QSOs: Evidence for Gravitational Lensing? (1996)

Berk, Daniel E. Vanden, Quashnock, Jean M., York, Donald G., Yanny, Brian

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 gravitational lensing of...

A Constraint on the Distance Scale to Cosmological Gamma--Ray Bursts (1996)

Quashnock, Jean M.

If \g--ray bursts are cosmological in origin, the sources are expected to trace the large--scale structure of luminous matter in the universe. I use a new likelihood method that compares the...

A Constraint on the Distance Scale to Cosmological Gamma--Ray Bursts (1995)

Quashnock, Jean M.

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 compares the...

Likelihood Analysis of Repeating in the BATSE Catalogue (1995)

Quashnock, Jean M.

I describe a new likelihood technique, based on counts-in-cells statistics, that I use to analyze repeating in the BATSE 1B and 2B catalogues. Using the 1B data, I find that repeating is preferred...