Mitigating the impact of the DESI fiber assignment on galaxy clustering

In this paper, we present a simple strategy to mitigate the impact of an incomplete spectroscopic redshift galaxy sample as a result of fiber assignment and survey tiling. The method has been designed for the Dark Energy Spectroscopic Instrument (DESI) galaxy survey but may have applications beyond...

Full description

Saved in:
Bibliographic Details
Published in:Journal of cosmology and astroparticle physics 2017-03, Vol.2017 (3), p.1-1, Article 001
Main Authors: Burden, Angela, Padmanabhan, Nikhil, Cahn, Robert N., White, Martin J., Samushia, Lado
Format: Article
Language:English
Subjects:
ASTRONOMY AND ASTROPHYSICS
baryon acoustic oscillations
cosmological parameters from LSS
dark energy experiments
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:In this paper, we present a simple strategy to mitigate the impact of an incomplete spectroscopic redshift galaxy sample as a result of fiber assignment and survey tiling. The method has been designed for the Dark Energy Spectroscopic Instrument (DESI) galaxy survey but may have applications beyond this. We propose a modification to the usual correlation function that nulls the almost purely angular modes affected by survey incompleteness due to fiber assignment. Predictions of this modified statistic can be calculated given a model of the two point correlation function. The new statistic can be computed with a slight modification to the data catalogues input to the standard correlation function code and does not incur any additional computational time. Lastly, we show that the spherically averaged baryon acoustic oscillation signal is not biased by the new statistic.
ISSN:1475-7516
1475-7516
DOI:10.1088/1475-7516/2017/03/001