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Title: Dark Energy Survey Year 1 Results: Wide Field Mass Maps via Forward Fitting in Harmonic Space

Abstract

We present new wide-field weak lensing mass maps for the Year 1 Dark Energy Survey data, generated via a forward fitting approach. This method of producing maps does not impose any prior constraints on the mass distribution to be reconstructed. The technique is found to improve the map reconstruction on the edges of the field compared to the conventional Kaiser-Squires method, which applies a direct inversion on the data; our approach is in good agreement with the previous direct approach in the central regions of the footprint. The mapping technique is assessed and verified with tests on simulations; together with the Kaiser-Squires method, the technique is then applied to data from the Dark Energy Survey Year 1 data and the differences between the two methods are compared. We also produce the first DES measurements of the convergence Minkowski functionals and compare them to those measured in simulations.

Authors:
Publication Date:
Research Org.:
Brookhaven National Lab. (BNL), Upton, NY (United States); SLAC National Accelerator Lab., Menlo Park, CA (United States); Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
Contributing Org.:
DES
OSTI Identifier:
1546023
Report Number(s):
arXiv:1905.12682; FERMILAB-PUB-19-227-AE
1737558
DOE Contract Number:  
AC02-07CH11359
Resource Type:
Journal Article
Journal Name:
Mon.Not.Roy.Astron.Soc.
Additional Journal Information:
Journal Name: Mon.Not.Roy.Astron.Soc.
Country of Publication:
United States
Language:
English
Subject:
79 ASTRONOMY AND ASTROPHYSICS

Citation Formats

Mawdsley, B., and et al. Dark Energy Survey Year 1 Results: Wide Field Mass Maps via Forward Fitting in Harmonic Space. United States: N. p., 2019. Web.
Mawdsley, B., & et al. Dark Energy Survey Year 1 Results: Wide Field Mass Maps via Forward Fitting in Harmonic Space. United States.
Mawdsley, B., and et al. Wed . "Dark Energy Survey Year 1 Results: Wide Field Mass Maps via Forward Fitting in Harmonic Space". United States. https://www.osti.gov/servlets/purl/1546023.
@article{osti_1546023,
title = {Dark Energy Survey Year 1 Results: Wide Field Mass Maps via Forward Fitting in Harmonic Space},
author = {Mawdsley, B. and et al.},
abstractNote = {We present new wide-field weak lensing mass maps for the Year 1 Dark Energy Survey data, generated via a forward fitting approach. This method of producing maps does not impose any prior constraints on the mass distribution to be reconstructed. The technique is found to improve the map reconstruction on the edges of the field compared to the conventional Kaiser-Squires method, which applies a direct inversion on the data; our approach is in good agreement with the previous direct approach in the central regions of the footprint. The mapping technique is assessed and verified with tests on simulations; together with the Kaiser-Squires method, the technique is then applied to data from the Dark Energy Survey Year 1 data and the differences between the two methods are compared. We also produce the first DES measurements of the convergence Minkowski functionals and compare them to those measured in simulations.},
doi = {},
journal = {Mon.Not.Roy.Astron.Soc.},
number = ,
volume = ,
place = {United States},
year = {2019},
month = {5}
}