Modeling and Correcting the Time-Dependent ACS PSF (2009)
A. M. Koekemoer, P. Goudfrooij, L. L. Dressel, Jason Rhodes, Richard Massey, Justin Albert, ...
Abstract. The ability to accurately measure the shapes of faint objects in images taken with the Advanced Camera for Surveys (ACS) on the Hubble Space Telescope (HST) depends upon detailed knowledge...
Massey, Richard, Stoughton, Chris, Leauthaud, Alexie, Rhodes, Jason, Koekemoer, Anton, Ellis, Richard, ...
Charge Transfer Inefficiency (CTI) due to radiation damage above the Earth's atmosphere creates spurious trailing in Hubble Space Telescope (HST) images. Radiation damage also creates unrelated warm...
Results of the GREAT08 Challenge: An image analysis competition for cosmological lensing (2009)
Bridle, Sarah, Balan, Sreekumar T., Bethge, Matthias, Gentile, Marc, Harmeling, Stefan, Heymans, Catherine, ...
We present the results of the GREAT08 Challenge, a blind analysis challenge to infer weak gravitational lensing shear distortions from images. The primary goal was to stimulate new ideas by...
90 years on – the 1919 eclipse expedition at Príncipe (2009)
Ellis, Richard, Ferreira, Pedro G., Massey, Richard, Weszkalnys , Gisa
Richard Ellis, Pedro G Ferreira, Richard Massey and Gisa Weszkalnys return to Príncipe in the International Year of Astronomy to celebrate the 1919 RAS expedition led by Sir Arthur Eddington.
Digging into dark matter with weak gravitational lensing (2009)
Ordinary baryonic particles (such as protons and neutrons) account for only one-sixth of the total matter in the Universe. The remainder is a mysterious "dark matter" component, which does not...
First lensing measurements of SZ-discovered clusters (2009)
McInnes, Rachel N., Menanteau, Felipe, Heavens, Alan F., Hughes, John P., Jimenez, Raul, Massey, Richard, ...
We present the first lensing mass measurements of Sunyaev-Zel'dovich (SZ) selected clusters. Using optical imaging from the Southern Cosmology Survey (SCS), we present weak lensing masses for three...
Pixelation effects in weak lensing (2008)
High, F. William, Rhodes, Jason, Massey, Richard, Ellis, Richard
Weak gravitational lensing can be used to investigate both dark matter and dark energy but requires accurate measurements of the shapes of faint, distant galaxies. Such measurements are hindered by...
A comparison of weak-lensing measurements from ground- and space-based facilities (2008)
Kasliwal, Mansi M., Massey, Richard, Ellis, Richard S., Miyazaki, Satoshi, Rhodes, Jason
We assess the relative merits of weak-lensing surveys, using overlapping imaging data from the ground-based Subaru telescope and the Hubble Space Telescope (HST). Our tests complement similar studies...
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),...
First catalog of strong lens candidates in the COSMOS field (2008)
Faure, Cecile, Kneib, Jean-Paul, Covone, Giovanni, Tasca, Lidia, Leauthaud, Alexie, Capak, Peter, ...
We present the first catalog of 67 strong galaxy-galaxy lens candidates discovered in the 1.64 deg^2 Hubble Space Telescope COSMOS survey. Twenty of these systems display multiple images or strongly...
Combined analysis of weak lensing and X-ray blind surveys (2008)
Bergé, Joel, Pacaud, Florian, Réfrégier, Alexandre, Massey, Richard, Pierre, Marguerite, Amara, Adam, ...
We present a joint weak lensing and X-ray analysis of 4 deg^2 from the CFHTLS and XMMLSS surveys. Our weak lensing analysis is the first analysis of a real survey using shapelets, a new generation...
Handbook for the GREAT08 Challenge: An image analysis competition for cosmological lensing (2008)
Bridle, Sarah, Shawe-Taylor, John, Amara, Adam, Applegate, Douglas, Balan, Sreekumar T., Berge, Joel, ...
The GRavitational lEnsing Accuracy Testing 2008 (GREAT08) Challenge focuses on a problem that is of crucial importance for future observations in cosmology. The shapes of distant galaxies can be used...
Weak-lensing ellipticities in a strong-lensing regime (2008)
Massey, Richard, Goldberg, David M.
It is now routine to measure the weak gravitational lensing shear signal from the mean ellipticity of distant galaxies. However, conversion between ellipticity and shear assumes local linearity of...
First catalog of strong lens candidates in the COSMOS field (2008)
Faure, Cecile, Kneib, Jean-Paul, Covone, Giovanni, Tasca, Lidia, Leauthaud, Alexie, Capak, Peter, ...
Erratum: "First catalog of strong lens candidates in the COSMOS field" (ApJS, 176, 19 [2008]) (2008)
Faure, Cecile, Kneib, Jean-Paul, Covone, Giovanni, Tasca, Lidia, Leauthaud, Alexie, Capak, Peter, ...
First catalog of strong lens candidates in the COSMOS field (2008)
Faure, Cecile, Kneib, Jean-Paul, Covone, Giovanni, Tasca, Lidia, Leauthaud, Alexie, Capak, Peter, ...
We present the first catalog of 67 strong galaxy-galaxy lens candidates discovered in the 1.64 deg2 Hubble Space Telescope COSMOS survey. Twenty of these systems display multiple images or strongly...
Pixelation effects in weak lensing (2007)
High, F. William, Rhodes, Jason, Massey, Richard, Ellis, Richard
Weak gravitational lensing can be used to investigate both dark matter and dark energy but requires accurate measurements of the shapes of faint, distant galaxies. Such measurements are hindered by...
Weak lensing ellipticities in a strong lensing regime (2007)
Massey, Richard, Goldberg, David M.
It is now routine to measure the weak gravitational lensing shear signal from the mean ellipticity of distant galaxies. However, conversion between ellipticity and shear assumes local linearity of...
Weak gravitational shear and flexion with polar shapelets (2007)
Massey, Richard, Rowe, Barnaby, Refregier, Alexandre, Bacon, David J., Bergé, Joel
We derive expressions, in terms of 'polar shapelets', for the image distortion operations associated with weak gravitational lensing. Shear causes galaxy shapes to become elongated, and is sensitive...
Gravitational shear, flexion, and strong lensing in Abell 1689 (2007)
Leonard, Adrienne, Goldberg, David M., Haaga, Jason L., Massey, Richard
We present a gravitational lensing analysis of the galaxy cluster Abell 1689, incorporating measurements of the weak shear, flexion, and strong lensing induced in background galaxies. This is the...
Dark matter maps reveal cosmic scaffolding (2007)
Massey, Richard, Rhodes, Jason, Ellis, Richard, Scoville, Nick, Leauthaud, Alexie, Finoguenov, Alexis, ...
Ordinary baryonic particles (such as protons and neutrons) account for only one-sixth of the total matter in the Universe. The remainder is a mysterious "dark matter" component, which does not...
Dark matter maps reveal cosmic scaffolding (2007)
Massey, Richard, Rhodes, Jason, Ellis, Richard, Scoville, Nick, Leauthaud, Alexie, Finoguenov, Alexis, ...
Gavazzi, Raphael, Treu, Tommaso, Rhodes, Jason, Koopmans, Leon, Bolton, Adam, Burles, Scott, ...
We present a weak gravitational lensing analysis of 22 early-type strong lens galaxies, based on deep HST images obtained as part of the Sloan Lens ACS Survey. Using the most advanced techniques to...
Gavazzi, Raphael, Treu, Tommaso, Rhodes, Jason, Koopmans, Leon, Bolton, Adam, Burles, Scott, ...
We present a weak gravitational lensing analysis of 22 early-type strong lens galaxies, based on deep HST images obtained as part of the Sloan Lens ACS Survey. Using the most advanced techniques to...
Weak gravitational shear and flexion with polar shapelets (2006)
Massey, Richard, Rowe, Barnaby, Refregier, Alexandre, Bacon, David J., Berge, Joel
We derive expressions, in terms of "polar shapelets", for the image distortion operations associated with weak gravitational lensing. Shear causes galaxy shapes to become elongated, and is sensitive...
The Shear TEsting Programme 2: Factors affecting high precision weak lensing analyses (2006)
Massey, Richard, Heymans, Catherine, Berge, Joel, Bernstein, Gary, Bridle, Sarah, Clowe, Douglas, ...
The Shear TEsting Programme (STEP) is a collaborative project to improve the accuracy and reliability of weak lensing measurement, in preparation for the next generation of wide-field surveys. We...
The Shear Testing Programme - I. Weak lensing analysis of simulated ground-based observations (2006)
Heymans, Catherine, Van Waerbeke, Ludovic, Bacon, David, Berge, Joel, Bernstein, Gary, Bertin, Emmanuel, ...
The Shear Testing Programme (STEP) is a collaborative project to improve the accuracy and reliability of all weak lensing measurements in preparation for the next generation of wide-field surveys. In...
Massey, Richard, Refregier, Alexandre
The shapelets method for image analysis is based upon the decomposition of localized objects into a series of orthogonal components with convenient mathematical properties. We extend the 'Cartesian...
The Shear TEsting Programme 1: Weak lensing analysis of simulated ground-based observations (2005)
Heymans, Catherine, Van Waerbeke, Ludovic, Bacon, David, Berge, Joel, Bernstein, Gary, Bertin, Emmanuel, ...
The Shear TEsting Programme, STEP, is a collaborative project to improve the accuracy and reliability of all weak lensing measurements in preparation for the next generation of wide-field surveys. In...
Painful thin fiber neuropathy associated with hypothyroidism (2002)
Facsimile of the author's original dissertation. Alternate pages blank. Includes bibliographical references (leaves 97-104) Photocopy.Nathan, Queensland :Griffith University - Nathan Campus...
Painful thin fiber neuropathy associated with hypothyroidism (2002)
Facsimile of the author's original dissertation. Alternate pages blank. Includes bibliographical references.