A Method for Weak Lensing Observations

  title={A Method for Weak Lensing Observations},
  author={N. Kaiser and G. Squires and T. Broadhurst},
  journal={The Astrophysical Journal},
We develop and test a method for measuring the gravitational lensing induced distortion of faint background galaxies. We first describe how we locate the galaxies and measure a 2-component `polarisation' or ellipticity statistic $e_\alpha$ whose expectation value should be proportional to the gravitational shear $\gamma_\alpha$. We then show that an anisotropic instrumental psf perturbs the polarisation by $\delta e_\alpha = P^s_{\alpha\beta} p_\beta$, where $p_\alpha$ is a measure of the psf… Expand
The first shear measurements from precision weak lensing
We present an end-to-end methodology to measure the effects of weak lensing on individual galaxy-galaxy systems exploiting their kinematic information. Using this methodology, we have measured aExpand
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We present the first scaling relation between weak-lensing galaxy cluster mass, $M_{WL}$, and near-infrared luminosity, $L_K$. Our results are based on 17 clusters observed with wide-fieldExpand
The effective number density of galaxies for weak lensing measurements in the LSST project
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We present a gravitational lensing and X-ray analysis of a massive galaxy cluster and its surroundings. The core of MACS J0717.5+3745 (⁠|$M(R\lt 1\, {\rm Mpc})\sim$| |$2 \times 10^{15}\, \, {\rmExpand
Joint Strong and Weak Lensing Analysis of the Massive Cluster Field J0850+3604
We present a combined strong and weak lensing analysis of the J085007.6+360428 (J0850) field, which was selected by its high projected concentration of luminous red galaxies and contains the massiveExpand
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The recent discovery of thousands of ultra diffuse galaxies (UDGs) in nearby galaxy clusters has opened a new window into the process of galaxy formation and evolution. Several scenarios have beenExpand
An accurate and practical method for inference of weak gravitational lensing from galaxy images
We demonstrate highly accurate recovery of weak gravitational lensing shear using an implementation of the Bayesian Fourier Domain (BFD) method proposed by Bernstein & Armstrong (2014, BA14),Expand
LoCuSS: weak-lensing mass calibration of galaxy clusters
We present weak-lensing mass measurements of 50 X-ray luminous galaxy clusters at $0.15\le z\le0.3$, based on uniform high quality observations with Suprime-Cam mounted on the 8.2-m Subaru telescope.Expand


Les Houches Summer School
In trying to write a brief history of the Summer School for Theoretical Physics at Les Houches, I find myself facing an impossible task. On the one hand, the neutral tone of an admini­ strativeExpand
A&AR, in press
  • 1994