Mitigating the impact of fiber assignment on the measurement of galaxy-lensing cross correlation

Abstract

We examine the impact of fiber assignment on the measurement of galaxy clustering and its cross correlation with weak lensing fields. Unlike the past spectroscopic galaxy surveys such as Baryon Oscillation Spectroscopic Survey (BOSS), currently ongoing spectroscopic galaxy surveys such as Prime Focus Spectrograph (PFS) and Dark Energy Spectroscopic Instrument (DESI) suffer from the fiber assignment artifacts more severely because there are more target galaxies than available fibers. The previous studies found that the fiber assignment suppresses the amplitude of the galaxy power spectrum at all scales. We newly find that the fiber assignment introduces the artificial correlation of structure at different redshifts, which suppresses the amplitude of the galaxy-lensing cross power spectrum. We show that the fiber assignment effects on the cross power spectrum can be mitigated at all scales with accuracy better than $\sim 1\%$, by up-weighting observed galaxies with the probability to be observed. This is not the case for the galaxy power spectrum, which is not fully corrected at $k\gtrsim 0.2$ [$h$/Mpc]. We find that the galaxy-lensing cross power spectrum is not affected by the pairwise probability of galaxies to be observed, and thus the correction method based on the individual probability is sufficient at all scales.

arXiv comment21 pages, 13 figures, accepted to JCAP

References in corpus (40)

• Planck 2015 results. XIII. Cosmological parameters
• LSST: from Science Drivers to Reference Design and Anticipated Data Products
• The Cosmic Linear Anisotropy Solving System (CLASS) II: Approximation schemes
• The clustering of galaxies in the SDSS-III Baryon Oscillation Spectroscopic Survey: Baryon Acoustic Oscillations in the Data Release 10 and 11 galaxy samples
• The Completed SDSS-IV extended Baryon Oscillation Spectroscopic Survey: Cosmological Implications from two Decades of Spectroscopic Surveys at the Apache Point observatory
• The DESI Experiment Part I: Science,Targeting, and Survey Design
• The Hyper Suprime-Cam SSP Survey: Overview and Survey Design
• Wide-Field InfrarRed Survey Telescope-Astrophysics Focused Telescope Assets WFIRST-AFTA 2015 Report
• The Dark Energy Survey: more than dark energy - an overview
• Power Spectrum Analysis of Three-Dimensional Redshift Surveys
• The clustering of galaxies in the SDSS-III Baryon Oscillation Spectroscopic Survey: Baryon Acoustic Oscillations in the Data Release 9 Spectroscopic Galaxy Sample
• The Luminosity and Color Dependence of the Galaxy Correlation Function
• The 2dF Galaxy Redshift Survey: correlation functions, peculiar velocities and the matter density of the Universe
• Extragalactic Science, Cosmology and Galactic Archaeology with the Subaru Prime Focus Spectrograph (PFS)
• First Data Release of the Hyper Suprime-Cam Subaru Strategic Program
• The Cosmic Linear Anisotropy Solving System (CLASS) I: Overview
• Gravitational Lensing Analysis of the Kilo Degree Survey
• Percolation Galaxy Groups and Clusters in the SDSS Redshift Survey: Identification, Catalogs, and the Multiplicity Function
• The clustering of galaxies in the SDSS-III Baryon Oscillation Spectroscopic Survey: Testing gravity with redshift-space distortions using the power spectrum multipoles
• The clustering of massive galaxies at z~0.5 from the first semester of BOSS data
• The dependence of clustering on galaxy properties
• The Subaru FMOS galaxy redshift survey (FastSound). IV. New constraint on gravity theory from redshift space distortions at $z\sim 1.4$
• The DESI Experiment Part II: Instrument Design
• A Measurement of the Quadrupole Power Spectrum in the Clustering of the 2dF QSO Survey
• Prime Focus Spectrograph (PFS) for the Subaru Telescope: Overview, recent progress, and future perspectives
• Cosmic Shear Measurements with DES Science Verification Data
• The Hobby-Eberly Telescope Dark Energy Experiment (HETDEX): Description and Early Pilot Survey Results
• The Effect of Fiber Collisions on the Galaxy Power Spectrum Multipole
• Numerical study of statistical properties of the lensing excursion angles
• Unbiased clustering estimation in the presence of missing observations
• Generating Log-normal Mock Catalog of Galaxies in Redshift Space
• Unbiased clustering estimates with the DESI fibre assignment
• Correcting for Fibre Assignment Incompleteness in the DESI Bright Galaxy Survey
• Imprint of DESI fiber assignment on the anisotropic power spectrum of emission line galaxies
• Mitigating the Impact of the DESI Fiber Assignment on Galaxy Clustering
• Confronting missing observations with probability weights: Fourier space and generalised formalism
• Mitigating the impact of fiber assignment on clustering measurements from deep galaxy redshift surveys
• Using the Modified Nearest Neighbor Method to Correct Fiber-collision Effects on Galaxy Clustering
• The survey operation software system development for Prime Focus Spectrograph (PFS) on Subaru Telescope
• Ray-tracing log-normal simulation for weak gravitational lensing: application to the cross-correlation with galaxies