The DECADE cosmic shear project I: A new weak lensing shape catalog of 107 million galaxies

We present the Dark Energy Camera All Data Everywhere (DECADE) weak lensing dataset: a catalog of 107 million galaxies observed by the Dark Energy Camera (DECam) in the northern Galactic cap. This catalog was assembled from public DECam data including survey and standard observing programs. These data were consistently processed with the Dark Energy Survey Data Management pipeline as part of the DECADE campaign and serve as the basis of the DECam Local Volume Exploration survey (DELVE) Early Data Release 3 (EDR3). We apply the Metacalibration measurement algorithm to generate and calibrate galaxy shapes. After cuts, the resulting cosmology-ready galaxy shape catalog covers a region of with an effective number density of . The coadd images used to derive this data have a median limiting magnitude of <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"> <mml:mrow> <mml:mi>r</mml:mi> <mml:mo>=</mml:mo> <mml:mn>23.6</mml:mn> </mml:mrow> </mml:math> , <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"> <mml:mrow> <mml:mi>i</mml:mi> <mml:mo>=</mml:mo> <mml:mn>23.2</mml:mn> </mml:mrow> </mml:math> , and <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"> <mml:mrow> <mml:mi>z</mml:mi> <mml:mo>=</mml:mo> <mml:mn>22.6</mml:mn> </mml:mrow> </mml:math> , estimated at in a 2 arcsecond aperture. We present a suite of detailed studies to characterize the catalog, measure any residual systematic biases, and verify that the catalog is suitable for cosmology analyses. In parallel, we build an image simulation pipeline to characterize the remaining multiplicative shear bias in this catalog, which we measure to be <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"> <mml:mrow> <mml:mi>m</mml:mi> <mml:mo>=</mml:mo> <mml:mrow> <mml:mo stretchy="true" form="prefix">(</mml:mo> <mml:mo>−</mml:mo> <mml:mn>2.454</mml:mn> <mml:mo>±</mml:mo> <mml:mn>0.124</mml:mn> <mml:mo stretchy="true" form="postfix">)</mml:mo> </mml:mrow> <mml:mo>×</mml:mo> <mml:msup> <mml:mn>10</mml:mn> <mml:mrow> <mml:mo>−</mml:mo> <mml:mn>2</mml:mn> </mml:mrow> </mml:msup> </mml:mrow> </mml:math> for the full sample. Despite the significantly inhomogeneous nature of the data set, due to it being an amalgamation of various observing programs, we find the resulting catalog has sufficient quality to yield competitive cosmological constraints.

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Journal
The Open Journal of Astrophysics
Published
2025-10-22
DOI
https://doi.org/10.33232/001c.146158
Citations
2
Primary Topic
Astronomy and Astrophysical Research
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article
Field-Weighted Citation Impact
2.38
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article

The DECADE cosmic shear project I: A new weak lensing shape catalog of 107 million galaxies

Katherine Herron, G. E. Medina, A. K. Vivas, M. Gatti et al.
2 citations
The Open Journal of Astrophysics
Astronomy and Astrophysical Research
2.38
article

The DECADE cosmic shear project I: A new weak lensing shape catalog of 107 million galaxies

Katherine Herron, G. E. Medina, A. K. Vivas, M. Gatti, M. Adamów, M. R. Becker, W. Cerny, C. E. Martínez-Vázquez, S. Mau, K Eckert, A. Amon, J. Prat, Pol Massana, C. Chang, Rayane Brinck Teixeira, A.N Alsina, J. A. Carballo-Bello, Nathalie Chicoine, T. Shin, J. McCullough, Andrew B. Pace, D.J James, D. Gruen, Burçı̇n Mutlu-Pakdı̇l, C.Y. Tan, P. S. Ferguson, C. R. Bom, Amy S. K. Tong, J. D. Sakowska, M. Navabi, L. F. Secco, Dhayaa Anbajagane, Mike Jarvis, G. S. Stringfellow, A. Drlica-Wagner, A. Choi, Noelia E. D. Noël, L. Santana-Silva, A. Alarcon, C. Doux, R. A. Gruendl, M. Raveri, E. S. Rykoff, Z. Zhang, M. Yamamoto, D Suson, M. A. Troxel, A. H. Riley, Y. Choi, M. Soares-Santos, I Sevilla-Noarbe, D. J. Sand, N Kuropatkin, D. Sanchez-Cid
article en
2 citations

Abstract

We present the Dark Energy Camera All Data Everywhere (DECADE) weak lensing dataset: a catalog of 107 million galaxies observed by the Dark Energy Camera (DECam) in the northern Galactic cap. This catalog was assembled from public DECam data including survey and standard observing programs. These data were consistently processed with the Dark Energy Survey Data Management pipeline as part of the DECADE campaign and serve as the basis of the DECam Local Volume Exploration survey (DELVE) Early Data Release 3 (EDR3). We apply the Metacalibration measurement algorithm to generate and calibrate galaxy shapes. After cuts, the resulting cosmology-ready galaxy shape catalog covers a region of with an effective number density of . The coadd images used to derive this data have a median limiting magnitude of <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"> <mml:mrow> <mml:mi>r</mml:mi> <mml:mo>=</mml:mo> <mml:mn>23.6</mml:mn> </mml:mrow> </mml:math> , <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"> <mml:mrow> <mml:mi>i</mml:mi> <mml:mo>=</mml:mo> <mml:mn>23.2</mml:mn> </mml:mrow> </mml:math> , and <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"> <mml:mrow> <mml:mi>z</mml:mi> <mml:mo>=</mml:mo> <mml:mn>22.6</mml:mn> </mml:mrow> </mml:math> , estimated at in a 2 arcsecond aperture. We present a suite of detailed studies to characterize the catalog, measure any residual systematic biases, and verify that the catalog is suitable for cosmology analyses. In parallel, we build an image simulation pipeline to characterize the remaining multiplicative shear bias in this catalog, which we measure to be <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"> <mml:mrow> <mml:mi>m</mml:mi> <mml:mo>=</mml:mo> <mml:mrow> <mml:mo stretchy="true" form="prefix">(</mml:mo> <mml:mo>−</mml:mo> <mml:mn>2.454</mml:mn> <mml:mo>±</mml:mo> <mml:mn>0.124</mml:mn> <mml:mo stretchy="true" form="postfix">)</mml:mo> </mml:mrow> <mml:mo>×</mml:mo> <mml:msup> <mml:mn>10</mml:mn> <mml:mrow> <mml:mo>−</mml:mo> <mml:mn>2</mml:mn> </mml:mrow> </mml:msup> </mml:mrow> </mml:math> for the full sample. Despite the significantly inhomogeneous nature of the data set, due to it being an amalgamation of various observing programs, we find the resulting catalog has sufficient quality to yield competitive cosmological constraints.

The Open Journal of AstrophysicsVol. 8
Purdue University Northwest (US), Argonne National Laboratory (US), Fermi National Accelerator Laboratory (US), University of Pittsburgh (US), Universidade Estadual de Campinas (UNICAMP) (BR), Urbana University (US), University of Tarapacá (CL), Princeton University (US), Yale University (US), International Society for Developmental Origins of Health and Disease (GB), Institut d'Estudis Espacials de Catalunya (ES), Kavli Institute for Particle Astrophysics and Cosmology (US), Astron Wireless Technologies (United States) (US), Electronics for Imaging (United States) (US), Genoa (Brazil) (BR), Menlo School (US), Gemini North Observatory (US), Indiana Cancer Consortium (US), Astrobiology Center (JP), CASA (US), Unidades Centrales Científico-Técnicas (ES), Gemini South Observatory (CL), Istituto Nazionale di Fisica Nucleare, Sezione di Genova (IT), Institut für Urheber- und Medienrecht (DE), Cerro Tololo Inter-American Observatory (CL), Laboratoire de Physique Subatomique et de Cosmologie (FR), Centro de Investigaciones Energéticas, Medioambientales y Tecnológicas (ES), Dartmouth Hospital (GB), Seattle University (US), Carnegie Mellon University (US), University of Pennsylvania (US), University of Genoa (IT), Netherlands Institute for Radio Astronomy (NL)
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