Cluster mass profile reconstruction with size and flux magnification on the HST STAGES survey

Abstract

We present the first measurement of individual cluster mass estimates using weak lensing size and flux magnification. Using data from the HST-STAGES survey of the A901/902 supercluster we detect the four known groups in the supercluster at high significance using magnification alone. We discuss the application of a fully Bayesian inference analysis, and investigate a broad range of potential systematics in the application of the method. We compare our results to a previous weak lensing shear analysis of the same field finding the recovered signal-to-noise of our magnification-only analysis to range from 45% to 110% of the signal-to-noise in the shear-only analysis. On a case-by-case basis we find consistent magnification and shear constraints on cluster virial radius, and finding that for the full sample, magnification constraints to be a factor $0.77\pm 0.18$ lower than the shear measurements.

Accepted to MNRAS

References in corpus (15)

• The Shear TEsting Programme 2: Factors affecting high precision weak lensing analyses
• Bayesian Galaxy Shape Measurement for Weak Lensing Surveys -I. Methodology and a Fast Fitting Algorithm
• GALAPAGOS: From Pixels to Parameters
• Handbook for the GREAT08 Challenge: An image analysis competition for cosmological lensing
• The dark matter environment of the Abell 901/902 supercluster: a weak lensing analysis of the HST STAGES survey
• Cosmic shear analysis of archival HST/ACS data: I. Comparison of early ACS pure parallel data to the HST/GEMS Survey
• Hierarchical Cosmic Shear Power Spectrum Inference
• STAGES: the Space Telescope A901/2 Galaxy Evolution Survey
• A blind test of photometric redshifts on ground-based data
• CFHTLenS: A Weak Lensing Shear Analysis of the 3D-Matched-Filter Galaxy Clusters
• Background sky obscuration by cluster galaxies as a source of systematic error for weak lensing
• Hierarchical probabilistic inference of cosmic shear
• Detection of spatial correlations of fundamental plane residuals, and cosmological implications
• Combining spectroscopic and photometric surveys using angular cross-correlations II: Parameter constraints from different physical effects
• Intrinsic size correlations in weak lensing

Cited by in corpus (12)

• What does the Bullet Cluster tell us about self-interacting dark matter?
• KiDS-1000 catalogue: Weak gravitational lensing shear measurements
• A study of the sensitivity of shape measurements to the input parameters of weak lensing image simulations
• The Richness-to-Mass Relation of CAMIRA Galaxy Clusters from Weak-lensing Magnification in the Subaru Hyper Suprime-Cam Survey
• Disentangling magnification in combined shear-clustering analyses
• Weak lensing power spectrum reconstruction by counting galaxies.-- I: the ABS method
• The integrated angular bispectrum of weak lensing
• Large-scale imprint of relativistic effects in the cosmic magnification
• Intrinsic correlations of galaxy sizes in a hydrodynamical cosmological simulation
• Modelling the impact of intrinsic size and luminosity correlations on magnification estimation
• Weak Lensing Reconstruction by Counting DECaLS Galaxies
• Challenges in Cosmic Magnification Reconstruction by Magnification Response