Related papers: Dark Energy Survey Year 6 Results: Point-spread Fu…

Instrumental response model and detrending for the Dark Energy Camera

We describe the model for the mapping from sky brightness to the digital output of the Dark Energy Camera, and the algorithms adopted by the Dark Energy Survey (DES) for inverting this model to obtain photometric measures of celestial…

Instrumentation and Methods for Astrophysics · Physics 2017-09-20 G. M. Bernstein , T. M. C. Abbott , S. Desai , D. Gruen , R. A. Gruendl , M. D. Johnson , H. Lin , F. Menanteau , E. Morganson , E. Neilsen , K. Paech , A. R. Walker , W. Wester , B. Yanny

Dark Energy Survey Year 3 Results: Photometric Data Set for Cosmology

We describe the Dark Energy Survey (DES) photometric data set assembled from the first three years of science operations to support DES Year 3 cosmology analyses, and provide usage notes aimed at the broad astrophysics community. Y3 Gold…

Cosmology and Nongalactic Astrophysics · Physics 2021-05-28 I. Sevilla-Noarbe , K. Bechtol , M. Carrasco Kind , A. Carnero Rosell , M. R. Becker , A. Drlica-Wagner , R. A. Gruendl , E. S. Rykoff , E. Sheldon , B. Yanny , A. Alarcon , S. Allam , A. Amon , A. Benoit-Lévy , G. M. Bernstein , E. Bertin , D. L. Burke , J. Carretero , A. Choi , H. T. Diehl , S. Everett , B. Flaugher , E. Gaztanaga , J. Gschwend , I. Harrison , W. G. Hartley , B. Hoyle , M. Jarvis , M. D. Johnson , R. Kessler , R. Kron , N. Kuropatkin , B. Leistedt , T. S. Li , F. Menanteau , E. Morganson , R. L. C. Ogando , A. Palmese , F. Paz-Chinchón , A. Pieres , C. Pond , M. Rodriguez-Monroy , J. Allyn-Smith , K. M. Stringer , M. A. Troxel , D. L. Tucker , J. de Vicente , W. Wester , Y. Zhang , T. M. C. Abbott , M. Aguena , J. Annis , S. Avila , S. Bhargava , S. L. Bridle , D. Brooks , D. Brout , F. J. Castander , R. Cawthon , C. Chang , C. Conselice , M. Costanzi , M. Crocce , L. N. da Costa , M. E. E. Pereira , T. M. Davis , S. Desai , J. P. Dietrich , P. Doel , K. Eckert , A. E. Evrard , I. Ferrero , P. Fosalba , J. García-Bellido , D. W. Gerdes , T. Giannantonio , D. Gruen , G. Gutierrez , S. R. Hinton , D. L. Hollowood , K. Honscheid , E. M. Huff , D. Huterer , D. J. James , T. Jeltema , K. Kuehn , O. Lahav , C. Lidman , M. Lima , H. Lin , M. A. G. Maia , J. L. Marshall , P. Martini , P. Melchior , R. Miquel , J. J. Mohr , R. Morgan , E. Neilsen , A. A. Plazas , A. K. Romer , A. Roodman , E. Sanchez , V. Scarpine , M. Schubnell , S. Serrano , M. Smith , E. Suchyta , G. Tarle , D. Thomas , C. To , T. N. Varga , R. H. Wechsler , J. Weller , R. D. Wilkinson

Dark Energy Survey Year 6 Results: Synthetic-source Injection Across the Full Survey Using Balrog

Synthetic source injection (SSI), the insertion of sources into pixel-level on-sky images, is a powerful method for characterizing object detection and measurement in wide-field, astronomical imaging surveys. Within the Dark Energy Survey…

Cosmology and Nongalactic Astrophysics · Physics 2025-05-30 D. Anbajagane , M. Tabbutt , J. Beas-Gonzalez , B. Yanny , S. Everett , M. R. Becker , M. Yamamoto , E. Legnani , J. De Vicente , K. Bechtol , J. Elvin-Poole , G. M. Bernstein , A. Choi , M. Gatti , G. Giannini , R. A. Gruendl , M. Jarvis , S. Lee , J. Mena-Fernández , A. Porredon , M. Rodriguez-Monroy , E. Rozo , E. S. Rykoff , T. Schutt , E. Sheldon , M. A. Troxel , N. Weaverdyck , V. Wetzell , M. Aguena , A. Alarcon , S. Allam , A. Amon , F. Andrade-Oliveira , J. Blazek , D. Brooks , A. Carnero Rosell , J. Carretero , C. Chang , M. Crocce , L. N. da Costa , M. E. S. Pereira , T. M. Davis , S. Desai , H. T. Diehl , S. Dodelson , P. Doel , A. Drlica-Wagner , A. Ferté , J. Frieman , J. García-Bellido , E. Gaztanaga , D. Gruen , G. Gutierrez , W. G. Hartley , K. Herner , S. R. Hinton , D. L. Hollowood , K. Honscheid , D. Huterer , D. J. James , E. Krause , K. Kuehn , O. Lahav , J. L. Marshall , R. Miquel , J. Muir , J. Myles , A. Pieres , A. A. Plazas Malagón , J. Prat , M. Raveri , S. Samuroff , E. Sanchez , D. Sanchez Cid , I. Sevilla-Noarbe , M. Smith , E. Suchyta , G. Tarle , D. L. Tucker , A. R. Walker , P. Wiseman , Y. Zhang

Measuring a Charge-Coupled Device Point Spread Function: Euclid Visible Instrument CCD273-84 PSF Performance

In this paper we present the testing of a back-illuminated development Euclid Visible Instrument (VIS) Charge-Coupled Device (CCD) to measure the intrinsic CCD Point Spread Function (PSF) characteristics using a novel modelling technique.…

Instrumentation and Methods for Astrophysics · Physics 2015-06-23 Sami-Matias Niemi , Mark Cropper , Magdalena Szafraniec , Thomas Kitching

Weak Lensing Measurements: A Revisited Method and Application to HST Images

The weak distortions produced by gravitational lensing in the images of background galaxies provide a method to measure directly the distribution of mass in the universe. However this technique requires high precision measurements of the…

Astrophysics · Physics 2009-10-31 Jason Rhodes , Alexandre Refregier , Ed Groth

Shapes and Shears, Stars and Smears: Optimal Measurements for Weak Lensing

We present the theoretical and analytical bases of optimal techniques to measure weak gravitational shear from images of galaxies. We first characterize the geometric space of shears and ellipticity, then use this geometric interpretation…

Astrophysics · Physics 2009-11-06 G. M. Bernstein , M. Jarvis

Modelling and Correcting the Time-Dependent ACS PSF

The ability to accurately measure the shapes of faint objects in images taken with the Advanced Camera for Surveys(ACS) on the Hubble Space Telescope (HST) depends upon detailed knowledge of the Point Spread Function (PSF). We show that…

Astrophysics · Physics 2007-05-23 Jason Rhodes , Richard Massey , Justin Albert , James E. Taylor , Anton Koekemoer , Alexie Leauthaud

High precision wavefront control in point spread function engineering for single emitter localization

Point Spread Function (PSF) engineering is used in single emitter localization to measure the emitter position in 3D and possibly other parameters such as the emission color or dipole orientation as well. Advanced PSF models such as spline…

Optics · Physics 2018-03-26 Marijn Siemons , Christiaan Hulleman , Rasmus Thorsen , Carlas Smith , Sjoerd Stallinga

Point spread function modeling and images restoration for cone-beam CT

X-ray cone-beam computed tomography (CT) has the notable features such as high efficiency and precision, and is widely used in the fields of medical imaging and industrial non-destructive testing, but the inherent imaging degradation…

Optics · Physics 2015-06-19 Hua Zhang , Kuidong Huang , Yikai Shi , Zhe Xu

Resolution and accuracy of non-linear regression of PSF with artificial neural networks

In a previous work we have demonstrated a novel numerical model for the point spread function (PSF) of an optical system that can efficiently model both experimental measurements and lens design simulations of the PSF. The novelty lies in…

Image and Video Processing · Electrical Eng. & Systems 2018-06-25 Matthias Lehmann , Christian Wittpahl , Hatem Ben Zakour , Alexander Braun

The Dark Energy Survey Data Management System

The Dark Energy Survey collaboration will study cosmic acceleration with a 5000 deg2 griZY survey in the southern sky over 525 nights from 2011-2016. The DES data management (DESDM) system will be used to process and archive these data and…

Astrophysics · Physics 2009-11-13 Joseph J. Mohr , Wayne Barkhouse , Cristina Beldica , Emmanuel Bertin , Y. Dora Cai , Luiz da Costa , J. Anthony Darnell , Gregory E. Daues , Michael Jarvis , Michelle Gower , Huan Lin , leandro Martelli , Eric Neilsen , Chow-Choong Ngeow , Ricardo Ogando , Alex Parga , Erin Sheldon , Douglas Tucker , Nikolay Kuropatkin , Chris Stoughton

Dark Energy Survey Year 6 Results: Redshift Calibration of the MagLim++ Lens Sample

In this work, we derive and calibrate the redshift distribution of the MagLim++ lens galaxy sample used in the Dark Energy Survey Year 6 (DES Y6) 3x2pt cosmology analysis. The 3x2pt analysis combines galaxy clustering from the lens galaxy…

Cosmology and Nongalactic Astrophysics · Physics 2025-09-10 G. Giannini , A. Alarcon , W. d'Assignies , G. M. Bernstein , M. A. Troxel , C. Chang , B. Yin , A. Amon , J. Myles , N. Weaverdyck , A. Porredon , D. Anbajagane , S. Avila , K. Bechtol , M. R. Becker , J. Blazek , M. Crocce , D. Gruen , M. Rodriguez-Monroy , C. Sánchez , D. Sanchez Cid , I. Sevilla-Noarbe , M. Aguena , S. Allam , O. Alves , F. Andrade-Oliveira , D. Bacon , S. Bocquet , D. Brooks , R. Camilleri , A. Carnero Rosell , J. Carretero , R. Cawthon , L. N. da Costa , M. E. da Silva Pereira , T. M. Davis , J. De Vicente , D. L. DePoy , S. Desai , H. T. Diehl , S. Dodelson , P. Doel , C. Doux , A. Drlica-Wagner , J. Elvin-Poole , S. Everett , A. E. Evrard , B. Flaugher , J. Frieman , J. García-Bellido , M. Gatti , E. Gaztanaga , P. Giles , R. A. Gruendl , G. Gutierrez , K. Herner , S. R. Hinton , D. L. Hollowood , K. Honscheid , D. Huterer , D. J. James , K. Kuehn , O. Lahav , S. Lee , H. Lin , J. L. Marshall , J. Mena-Fernández , F. Menanteau , R. Miquel , J. Muir , R. L. C. Ogando , D. Petravick , A. A. Plazas Malagón , J. Prat , M. Raveri , E. S. Rykoff , S. Samuroff , E. Sanchez , T. Shin , M. Smith , E. Suchyta , M. E. C. Swanson , G. Tarle , D. Thomas , C. To , D. L. Tucker , V. Vikram , M. Yamamoto

Cosmological weak lensing with the HST GEMS survey

We present our cosmic shear analysis of GEMS, one of the largest wide-field surveys ever undertaken by the Hubble Space Telescope. Imaged with the Advanced Camera for Surveys (ACS), GEMS spans 795 square arcmin in the Chandra Deep Field…

Astrophysics · Physics 2009-11-10 Catherine Heymans , Michael L. Brown , Marco Barden , John A. R. Caldwell , Knud Jahnke , Chien Y. Peng , Hans-Walter Rix , Andy Taylor , Steven V. W. Beckwith , Eric F. Bell , Andrea Borch , Boris Haeussler , Shardha Jogee , Daniel H. McIntosh , Klaus Meisenheimer , Sebastian F. Sanchez , Rachel Somerville , Lutz Wisotzki , Christian Wolf

Dark Energy Survey Year 3: Blue Shear

Modeling the intrinsic alignment (IA) of galaxies poses a challenge to weak lensing analyses. The Dark Energy Survey is expected to be less impacted by IA when limited to blue, star-forming galaxies. The cosmological parameter constraints…

Cosmology and Nongalactic Astrophysics · Physics 2026-05-07 J. McCullough , A. Amon , E. Legnani , D. Gruen , A. Roodman , O. Friedrich , N. MacCrann , M. R. Becker , J. Myles , S. Dodelson , S. Samuroff , J. Blazek , J. Prat , K. Honscheid , A. Pieres , A. Ferté , A. Alarcon , A. Drlica-Wagner , A. Choi , A. Navarro-Alsina , A. Campos , A. A. Plazas Malagón , A. Porredon , A. Farahi , A. J. Ross , A. Carnero Rosell , B. Yin , B. Flaugher , B. Yanny , C. Sánchez , C. Chang , C. Davis , C. To , C. Doux , D. Brooks , D. J. James , D. Sanchez Cid , D. L. Hollowood , D. Huterer , E. S. Rykoff , E. Gaztanaga , E. M. Huff , E. Suchyta , E. Sheldon , E. Sanchez , F. Tarsitano , F. Andrade-Oliveira , F. J. Castander , G. M. Bernstein , G. Gutierrez , G. Giannini , G. Tarle , H. T. Diehl , H. Huang , I. Harrison , I. Sevilla-Noarbe , I. Tutusaus , I. Ferrero , J. Elvin-Poole , J. L. Marshall , J. Muir , J. Weller , J. Zuntz , J. Carretero , J. DeRose , J. Frieman , J. Cordero , J. De Vicente , J. García-Bellido , J. Mena-Fernández , K. Eckert , A. K. Romer , K. Bechtol , K. Herner , K. Kuehn , L. F. Secco , L. N. da Costa , M. Paterno , 21 M. Soares-Santos , M. Gatti , M. Raveri , M. Yamamoto , M. Smith , M. Carrasco Kind , M. A. Troxel , M. Aguena , M. Jarvis , M. E. C. Swanson , N. Weaverdyck , O. Lahav , P. Doel , P. Wiseman , R. Miquel , R. A. Gruendl , R. Cawthon , S. Allam , S. R. Hinton , S. L. Bridle , S. Bocquet , S. Desai , S. Pandey , S. Everett , S. Lee , T. Shin , A. Palmese , C. Conselice , D. L. Burke , E. Buckley-Geer , M. Lima , M. Vincenzi , M. E. S. Pereira , M. Crocce , M. Schubnell , N. Jeffrey , O. Alves , V. Vikram , Y. Zhang , DES Collaboration

Measuring the Reduced Shear

Neglecting the second order corrections in weak lensing measurements can lead to a few percent uncertainties on cosmic shears, and becomes more important for cluster lensing mass reconstructions. Existing methods which claim to measure the…

Cosmology and Nongalactic Astrophysics · Physics 2015-05-18 Jun Zhang

A fully data-driven algorithm for accurate shear estimation

Weak lensing by large-scale structure is a powerful probe of cosmology if the apparent alignments in the shapes of distant galaxies can be accurately measured. We study the performance of a fully data-driven approach, based on…

Cosmology and Nongalactic Astrophysics · Physics 2021-12-15 Henk Hoekstra

Dark Energy Survey Year 3 Results: Calibration of Lens Sample Redshift Distributions using Clustering Redshifts with BOSS/eBOSS

We present clustering redshift measurements for Dark Energy Survey (DES) lens sample galaxies to be used in weak gravitational lensing and galaxy clustering studies. To perform this measurement, we cross-correlate with spectroscopic…

Cosmology and Nongalactic Astrophysics · Physics 2022-06-09 R. Cawthon , J. Elvin-Poole , A. Porredon , M. Crocce , G. Giannini , M. Gatti , A. J. Ross , E. S. Rykoff , A. Carnero Rosell , J. DeRose , S. Lee , M. Rodriguez-Monroy , A. Amon , K. Bechtol , J. De Vicente , D. Gruen , R. Morgan , E. Sanchez , J. Sanchez , I. Sevilla-Noarbe , T. M. C. Abbott , M. Aguena , S. Allam , J. Annis , S. Avila , D. Bacon , E. Bertin , D. Brooks , D. L. Burke , M. Carrasco Kind , J. Carretero , F. J. Castander , A. Choi , M. Costanzi , L. N. da Costa , M. E. S. Pereira , K. Dawson , S. Desai , H. T. Diehl , K. Eckert , S. Everett , I. Ferrero , P. Fosalba , J. Frieman , J. García-Bellido , E. Gaztanaga , R. A. Gruendl , J. Gschwend , G. Gutierrez , S. R. Hinton , D. L. Hollowood , K. Honscheid , D. Huterer , D. J. James , A. G. Kim , J. -P. Kneib , K. Kuehn , N. Kuropatkin , O. Lahav , M. Lima , H. Lin , M. A. G. Maia , P. Melchior , F. Menanteau , R. Miquel , J. J. Mohr , J. Muir , J. Myles , A. Palmese , S. Pandey , F. Paz-Chinchón , W. J. Percival , A. A. Plazas , A. Roodman , G. Rossi , V. Scarpine , S. Serrano , M. Smith , M. Soares-Santos , E. Suchyta , M. E. C. Swanson , G. Tarle , C. To , M. A. Troxel , R. D. Wilkinson , the DES Collaboration

Dark Energy Survey Deep Field photometric redshift performance and training incompleteness assessment

Context. The determination of accurate photometric redshifts (photo-zs) in large imaging galaxy surveys is key for cosmological studies. One of the most common approaches are machine learning techniques. These methods require a…

Cosmology and Nongalactic Astrophysics · Physics 2024-05-29 L. Toribio San Cipriano , J. De Vicente , I. Sevilla-Noarbe , W. G. Hartley , J. Myles , A. Amon , G. M. Bernstein , A. Choi , K. Eckert , R. A. Gruendl , I. Harrison , E. Sheldon , B. Yanny , M. Aguena , S. S. Allam , O. Alves , D. Bacon , D. Brooks , A. Campos , A. Carnero Rosell , J. Carretero , F. J. Castander , C. Conselice , L. N. da Costa , M. E. S. Pereira , T. M. Davis , S. Desai , H. T. Diehl , P. Doel , I. Ferrero , J. Frieman , J. García-Bellido , E. Gaztañaga , G. Giannini , S. R. Hinton , D. L. Hollowood , K. Honscheid , D. J. James , K. Kuehn , S. Lee , C. Lidman , J. L. Marshall , J. Mena-Fernández , F. Menanteau , R. Miquel , A. Palmese , A. Pieres , A. A. Plazas Malagón , A. Roodman , E. Sanchez , M. Smith , M. Soares-Santos , E. Suchyta , M. E. C. Swanson , G. Tarle , M. Vincenzi , N. Weaverdyck , P. Wiseman

Fast modeling of the shear three-point correlation function

The three-point correlation function (3PCF) of a weak lensing shear field contains information that is complementary to that in the two-point correlation function (2PCF), which can help improve the cosmological parameters and calibrate…

Cosmology and Nongalactic Astrophysics · Physics 2024-07-03 Sunao Sugiyama , Rafael C. H. Gomes , Mike Jarvis

Shear Measurement with Poorly Resolved Images

Weak lensing studies typically require excellent seeing conditions for the purpose of maximizing the number density of well-resolved galaxy images. It is interesting to ask to what extent the seeing size limits the usefulness of the…

Cosmology and Nongalactic Astrophysics · Physics 2022-09-14 Jun Zhang , Cong Liu , Pedro Alonso Vaquero , Hekun Li , Haoran Wang , Zhi Shen , Fuyu Dong