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Galaxy–galaxy lensing estimators and their covariance properties

Journal Article · · Monthly Notices of the Royal Astronomical Society
 [1];  [1];  [2];  [3];  [3]
  1. Carnegie Mellon Univ., Pittsburgh, PA (United States)
  2. Univ. of California, Berkeley, CA (United States)
  3. Brookhaven National Lab. (BNL), Upton, NY (United States)

Here, we study the covariance properties of real space correlation function estimators – primarily galaxy–shear correlations, or galaxy–galaxy lensing – using SDSS data for both shear catalogues and lenses (specifically the BOSS LOWZ sample). Using mock catalogues of lenses and sources, we disentangle the various contributions to the covariance matrix and compare them with a simple analytical model. We show that not subtracting the lensing measurement around random points from the measurement around the lens sample is equivalent to performing the measurement using the lens density field instead of the lens overdensity field. While the measurement using the lens density field is unbiased (in the absence of systematics), its error is significantly larger due to an additional term in the covariance. Therefore, this subtraction should be performed regardless of its beneficial effects on systematics. Comparing the error estimates from data and mocks for estimators that involve the overdensity, we find that the errors are dominated by the shape noise and lens clustering, which empirically estimated covariances (jackknife and standard deviation across mocks) that are consistent with theoretical estimates, and that both the connected parts of the four-point function and the supersample covariance can be neglected for the current levels of noise. While the trade-off between different terms in the covariance depends on the survey configuration (area, source number density), the diagnostics that we use in this work should be useful for future works to test their empirically determined covariances.

Research Organization:
Brookhaven National Laboratory (BNL), Upton, NY (United States)
Sponsoring Organization:
USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
Grant/Contract Number:
SC0012704
OSTI ID:
1408728
Report Number(s):
BNL--114519-2017-JA
Journal Information:
Monthly Notices of the Royal Astronomical Society, Journal Name: Monthly Notices of the Royal Astronomical Society Journal Issue: 4 Vol. 471; ISSN 0035-8711
Publisher:
Royal Astronomical SocietyCopyright Statement
Country of Publication:
United States
Language:
English

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The Baryon Oscillation Spectroscopic Survey of SDSS-III text January 2012
CFHTLenS: The Environmental Dependence of Galaxy Halo Masses from Weak Lensing text January 2013
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Joint analysis of cluster number counts and weak lensing power spectrum to correct for the super-sample covariance text January 2013
Mock galaxy catalogs using the quick particle mesh method text January 2013
Super-Sample Covariance in Simulations text January 2014
Joint likelihood function of cluster counts and $n$-point correlation functions: Improving their power through including halo sample variance text January 2014
Planck 2015 results. XIII. Cosmological parameters text January 2015
RCSLenS: Testing gravitational physics through the cross-correlation of weak lensing and large-scale structure text January 2015
SDSS-III Baryon Oscillation Spectroscopic Survey Data Release 12: galaxy target selection and large scale structure catalogues preprint January 2015
KiDS-450: Cosmological parameter constraints from tomographic weak gravitational lensing text January 2016
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A photometricity and extinction monitor at the Apache Point Observatory text January 2001
Spectroscopic Target Selection for the Sloan Digital Sky Survey: The Luminous Red Galaxy Sample text January 2001
Cosmological parameters from CMB and other data: a Monte-Carlo approach text January 2002
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Properties of galaxy dark matter halos from weak lensing text January 2003
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The 2.5 m Telescope of the Sloan Digital Sky Survey text January 2006
The Zurich Extragalactic Bayesian Redshift Analyzer (ZEBRA) and its first application: COSMOS text January 2006
An Improved Photometric Calibration of the Sloan Digital Sky Survey Imaging Data text January 2007
The Sloan Digital Sky Survey Photometric Camera text January 1998
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The seventh data release of the sloan digital sky survey text January 2009
Confirmation of general relativity on large scales from weak lensing and galaxy velocities text January 2010
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The ninth data release of the sloan digital sky survey: first spectroscopic data from the sdss-iiI baryon oscillation spectroscopic survey text January 2012
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KiDS+VIKING-450: Cosmic shear tomography with optical and infrared data journal January 2020
Measuring galaxy-galaxy-galaxy-lensing with higher precision and accuracy journal January 2020
KiDS-450 + 2dFLenS: Cosmological parameter constraints from weak gravitational lensing tomography and overlapping redshift-space galaxy clustering journal October 2017
Unveiling galaxy bias via the halo model, KiDS, and GAMA journal June 2018
Survey geometry and the internal consistency of recent cosmic shear measurements journal June 2018
Testing redMaPPer centring probabilities using galaxy clustering and galaxy–galaxy lensing journal July 2018
Emulating galaxy clustering and galaxy–galaxy lensing into the deeply non-linear regime: methodology, information, and forecasts journal August 2018
Studying galaxy troughs and ridges using weak gravitational lensing with the Kilo-Degree Survey journal September 2018
Probing gravity with a joint analysis of galaxy and CMB lensing and SDSS spectroscopy journal October 2018
KiDS+GAMA: cosmology constraints from a joint analysis of cosmic shear, galaxy–galaxy lensing, and angular clustering journal March 2018
Luminous red galaxies in the Kilo-Degree Survey: selection with broad-band photometry and weak lensing measurements journal May 2019
Covariance matrices for galaxy cluster weak lensing: from virial regime to uncorrelated large-scale structure journal September 2019
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Galaxy–Galaxy lensing in HSC: Validation tests and the impact of heterogeneous spectroscopic training sets journal October 2019
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Cosmology with galaxy–galaxy lensing on non-perturbative scales: emulation method and application to BOSS LOWZ journal December 2019
The mass–richness relation of optically selected clusters from weak gravitational lensing and abundance with Subaru HSC first-year data journal September 2019
Density split statistics: Cosmological constraints from counts and lensing in cells in DES Y1 and SDSS data journal July 2018
Dark Energy Survey year 1 results: Galaxy-galaxy lensing journal August 2018
Detection of Cross-Correlation between Gravitational Lensing and γ Rays journal March 2020
Constraints on the Mass–Richness Relation from the Abundance and Weak Lensing of SDSS Clusters journal February 2018
Constraints on Cosmology and Baryonic Feedback with the Deep Lens Survey Using Galaxy–Galaxy and Galaxy–Mass Power Spectra journal January 2019
Testing redMaPPer centring probabilities using galaxy clustering and galaxy-galaxy lensing text January 2017
KiDS+GAMA: Cosmology constraints from a joint analysis of cosmic shear, galaxy-galaxy lensing and angular clustering text January 2017
Dark Energy Survey Year 1 Results: Galaxy-Galaxy Lensing text January 2017
Emulating galaxy clustering and galaxy-galaxy lensing into the deeply nonlinear regime: methodology, information, and forecasts text January 2017
Density split statistics: Cosmological constraints from counts and lensing in cells in DES Y1 and SDSS data text January 2017
Constraints on Cosmology and Baryonic Feedback with the Deep Lens Survey Using Galaxy-Galaxy and Galaxy-Mass Power Spectra text January 2018
KiDS+GAMA: Intrinsic alignment model constraints for current and future weak lensing cosmology text January 2018
Testing gravity with galaxy-galaxy lensing and redshift-space distortions using CFHT-Stripe 82, CFHTLenS and BOSS CMASS datasets text January 2019
The mass-richness relation of optically-selected clusters from weak gravitational lensing and abundance with Subaru HSC first-year data text January 2019
Galaxy-Galaxy Lensing in HSC: Validation Tests and the Impact of Heterogeneous Spectroscopic Training Sets text January 2019
Covariance matrices for galaxy cluster weak lensing: from virial regime to uncorrelated large-scale structure text January 2019
Detection of cross-correlation between gravitational lensing and gamma rays text January 2019