Harald Ebeling

The Observed Growth of Massive Galaxy Clusters III: Testing General Relativity on Cosmological Scales (2009)

Rapetti, David, Allen, Steven W., Mantz, Adam, Ebeling, Harald

This is the third of a series of papers in which we derive simultaneous constraints on cosmological parameters and X-ray scaling relations using observations of the growth of massive, X-ray...

Hubble Space Telescope Observations of a Spectacular New Strong-lensing Galaxy Cluster - MACSJ1149.5+2223 at z=0.544 (2009)

Smith, Graham P., Ebeling, Harald, Limousin, Marceau, Kneib, Jean-Paul, Swinbank, A. M., Ma, Cheng-Jiun, ...

We present Advanced Camera for Surveys observations of MACSJ1149.5+2223, an X-ray luminous galaxy cluster at z=0.544 discovered by the Massive Cluster Survey. The data reveal at least seven...

The Observed Growth of Massive Galaxy Clusters I: Statistical Methods and Cosmological Constraints (2009)

Mantz, Adam, Allen, Steven W., Rapetti, David, Ebeling, Harald

(Abridged) This is the first of a series of papers in which we derive simultaneous constraints on cosmological parameters and X-ray scaling relations using observations of the growth of massive,...

The Observed Growth of Massive Galaxy Clusters II: X-ray Scaling Relations (2009)

Mantz, Adam, Allen, Steven W., Ebeling, Harald, Rapetti, David, Drlica-Wagner, Alex

(Abridged) This is the second in a series of papers in which we derive simultaneous constraints on cosmology and X-ray scaling relations using observations of massive, X-ray flux-selected galaxy...

An X-ray/optical study of the complex dynamics of the core of the massive intermediate-redshift cluster MACSJ0717.5+3745 (2009)

Ma, Cheng-Jiun, Ebeling, Harald, Barrett, Elizabeth

Using CHANDRA, we investigate the spatial temperature distribution of the intracluster medium (ICM) within 700 kpc of the center of the massive merging cluster MACSJ0717.5+3745 at z=0.55. Combining...

Constraints on modified gravity from the observed X-ray luminosity function of galaxy clusters (2008)

Rapetti, David, Allen, Steven W., Mantz, Adam, Ebeling, Harald

We use measurements of the growth of cosmic structure, as inferred from the observed evolution of the X-ray luminosity function (XLF) of galaxy clusters, to constrain departures from General...

Probing the Large-Scale Structure Around the Most Distant Galaxy Clusters from the Massive Cluster Survey (2008)

Kartaltepe, Jeyhan S., Ebeling, Harald, Ma, C. J., Donovan, David

We present maps of the cosmic large-scale structure around the twelve most distant galaxy clusters from the Massive Cluster Survey (MACS) as traced by the projected surface density of galaxies on the...

Revealing the properties of dark matter in the merging cluster MACSJ0025.4-1222 (2008)

Bradač, Maruša, Allen, Steven W., Treu, Tommaso, Ebeling, Harald, Massey, Richard, Morris, R. Glenn, ...

We constrain the physical nature of dark matter using the newly identified massive merging galaxy cluster MACSJ0025.4-1222. As was previously shown by the example of the Bullet Cluster (1E0657-56),...

The spatial distribution of galaxies of different spectral types in the massive intermediate-redshift cluster MACSJ0717.5+3745 (2008)

Ma, Cheng-Jiun, Ebeling, Harald, Donovan, David, Barrett, Elizabeth

We present the results of a wide-field spectroscopic analysis of the galaxy population of the massive cluster MACSJ0717.5+3745 and the surrounding filamentary structure (z=0.55), as part of our...

A statistical study of multiply-imaged systems in the lensing cluster Abell 68 (2007)

Richard, Johan, Kneib, Jean-Paul, Jullo, Eric, Covone, Giovanni, Limousin, Marceau, Ellis, Richard, ...

We have carried out an extensive spectroscopic survey with the Keck and VLT telescopes, targeting lensed galaxies in the background of the massive cluster Abell 68. Spectroscopic measurements are...

Mapping Large-Scale Structures Behind the Galactic Plane: The Second CIZA Subsample (2005)

Kocevski, Dale D., Ebeling, Harald, Mullis, Chris R., Tully, R. Brent

We present the latest results of the Clusters in the Zone of Avoidance (CIZA) survey, which is mapping the large-scale matter distribution behind the Milky Way by performing the first systematic...

A Hubble Space Telescope Lensing Survey of X-ray Luminous Galaxy Clusters: IV. Mass, Structure and Thermodynamics of Cluster Cores at z=0.2 (2005)

Smith, Graham P., Kneib, Jean-Paul, Smail, Ian, Mazzotta, Pasquale, Ebeling, Harald, Czoske, Oliver

We present a comprehensive space-based study of ten X-ray luminous galaxy clusters (L_X>=8e44erg/s[0.1-2.4keV]) at z=0.2. Hubble Space Telescope observations reveal numerous gravitationally-lensed...

An analytic investigation of the scatter in the integrated X-ray properties of galaxy groups and clusters (2005)

Balogh, Michael L., Babul, Arif, Voit, G. Mark, McCarthy, Ian G., Jones, Laurence R., Lewis, Geraint F., ...

(Abridged) We revisit the scaling relationships between the dark matter mass and observed X-ray luminosity and temperature of galaxy clusters and groups in the local Universe. Specifically, we...

On The Origin of the Local Group's Peculiar Velocity (2005)

Kocevski, Dale D., Ebeling, Harald

We aim to settle the debate regarding the fraction of the Local Group's peculiar velocity that is induced by structures beyond the Great Attractor by calculating the dipole anisotropy of the largest,...

The Origin of the Spatial Distribution of X-ray luminous AGN in Massive Galaxy Clusters (2005)

Ruderman, Joshua T., Ebeling, Harald

We study the spatial distribution of a 95% complete sample of 508 X-ray point sources (XPS) detected in the 0.5-2.0 keV band in Chandra ACIS-I observations of 51 massive galaxy clusters found in the...

A Hubble Space Telescope Lensing Survey of X-ray Luminous Galaxy Clusters: IV. Mass, Structure and Thermodynamics of Cluster Cores at z=0.2 (2004)

Smith, Graham P., Kneib, Jean-Paul, Smail, Ian, Mazzotta, Pasquale, Ebeling, Harald, Czoske, Oliver

We present a comprehensive space-based study of ten X-ray luminous galaxy clusters (L_X>=8e44erg/s[0.1-2.4keV]) at z=0.2. Hubble Space Telescope observations reveal numerous gravitationally-lensed...

The Dipole Anisotropy of the First All-Sky X-ray Cluster Sample (2004)

Kocevski, Dale D., Mullis, Christopher R., Ebeling, Harald

We combine the recently published CIZA galaxy cluster catalogue with the XBACs cluster sample to produce the first all-sky catalogue of X-ray clusters in order to examine the origins of the Local...

A Hubble Space Telescope Lensing Survey of X-ray Luminous Galaxy Clusters: IV. Mass, Structure and Thermodynamics of Cluster Cores at z=0.2 (2004)

Smith, Graham P., Kneib, Jean-Paul, Smail, Ian, Mazzotta, Pasquale, Ebeling, Harald, Czoske, Oliver

We present a comprehensive space-based study of ten X-ray luminous galaxy clusters (L_X>=8e44erg/s[0.1-2.4keV]) at z=0.2. Hubble Space Telescope observations reveal numerous gravitationally-lensed...

A Hubble Space Telescope Lensing Survey of X-ray Luminous Galaxy Clusters: IV. Mass, Structure and Thermodynamics of Cluster Cores at z=0.2 (2004)

Smith, Graham P., Kneib, Jean-Paul, Smail, Ian, Mazzotta, Pasquale, Ebeling, Harald, Czoske, Oliver

We present a comprehensive space-based study of ten X-ray luminous galaxy clusters (L_X>=8e44erg/s[0.1-2.4keV]) at z=0.2. Hubble Space Telescope observations reveal numerous gravitationally-lensed...

A unique small-scale gravitational arc in Abell 1201 (2003)

Edge, Alastair C., Smith, Graham P., Sand, David J., Treu, Tommaso, Ebeling, Harald, Allen, Steven W., ...

We present a snapshot Hubble Space Telescope (HST) image of the galaxy cluster A1201 (z=0.169), revealing a tangential arc 2arcsec from the brightest cluster galaxy (BCG). Keck-ESI spectroscopy...

Improved approximations of Poissonian errors for high confidence levels (2003)

Ebeling, Harald

We present improved numerical approximations to the exact Poissonian confidence limits for small numbers n of observed events following the approach of Gehrels (1986). Analytic descriptions of all...

Data analysis methods for XMM-Newton observations of extended sources. Application to bright massive clusters of galaxies at z=0.2 (2002)

Marty, Philippe B., Kneib, Jean-Paul, Sadat, Rachida, Ebeling, Harald, Smail, Ian

In this paper, a review is given of methods useful for XMM-Newton EPIC data analysis of extended sources, along with some applications to a bright massive cluster of galaxies at z=0.2, Abell 209....

A Hubble Space Telescope Lensing Survey of X-ray Luminous Galaxy Clusters: II. A Search for Gravitationally Lensed EROs (2001)

Smith, Graham P., Smail, Ian, Kneib, Jean-Paul, Czoske, Oliver, Ebeling, Harald, Edge, Alastair, ...

We present the results of a survey for Extremely Red Objects (EROs) in the fields of ten galaxy cluster lenses at z~0.2, combining high-resolution Hubble Space Telescope imaging with deep K-band...

Sunyaev-Zel'dovich Effect Imaging of Massive Clusters of Galaxies at Redshift z > 0.8 (2000)

Joy, Marshall, LaRoque, Samuel, Grego, Laura, Carlstrom, John E., Dawson, Kyle, Ebeling, Harald, ...

We present Sunyaev-Zel'dovich Effect (SZE) imaging observations of three distant (z > 0.8) and highly X-ray luminous clusters of galaxies, Cl1226+33, Cl0152-13 and MS1054-03. Two of the clusters,...

An HST Lensing Survey of X-ray Luminous Galaxy Clusters: I. A383 (2000)

Smith, Graham P., Kneib, Jean-Paul, Ebeling, Harald, Czoske, Oliver, Smail, Ian

We analyse the mass distribution in the core of A383 (z=0.188), one of 12 X-ray luminous clusters at z~0.2 selected for a comprehensive and unbiased study of the mass distribution in massive...

A combined HST/CFH12k/XMM survey of X-ray luminous clusters of galaxies at z~0.2 (2000)

Czoske, Oliver, Kneib, Jean-Paul, Smail, Ian, Smith, Graham P., Ebeling, Harald

We describe a project to study a sample of X-ray luminous clusters of galaxies at redshift z~0.2 at several scales (with HST/WFPC2 and CFHT/CFH12k) and wavebands (optical and X-ray). The main aims of...

Closing the gap: an X-ray selected sample of clusters of galaxies behind the Galactic plane (2000)

Ebeling, Harald, Mullis, Christopher, Tully, Brent

We discuss the design and current status of the CIZA survey, the first systematic X-ray search for clusters of galaxies in the Galactic plane region. So far, we have compiled a sample of more than 70...

MACS: The evolution and properties of massive clusters of galaxies (2000)

Ebeling, Harald, Edge, Alastair, Henry, J. Patrick

We present first results from the MAssive Cluster Survey (MACS), a new large-scale X-ray survey designed to find and characterize very massive, distant clusters of galaxies. Based on X-ray detections...

The Environmental Dependence of Brightest Cluster Galaxies: Implications for Large-Scale Flows (1996)

Hudson, Michael J., Ebeling, Harald

(Shortened) We construct a subsample of the Lauer & Postman (LP) brightest cluster galaxy (BCG) sample which comprises 64 Abell/ACO clusters with X-ray luminosities from ROSAT. We find that both BCG...