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

Dark Energy Survey Year 1 Results: Methodology and Projections for Joint Analysis of Galaxy Clustering, Galaxy Lensing, and CMB Lensing Two-point Functions

Optical imaging surveys measure both the galaxy density and the gravitational lensing-induced shear fields across the sky. Recently, the Dark Energy Survey (DES) collaboration used a joint fit to two-point correlations between these…

Cosmology and Nongalactic Astrophysics · Physics 2019-01-09 E. J. Baxter , Y. Omori , C. Chang , T. Giannantonio , D. Kirk , E. Krause , J. Blazek , L. Bleem , A. Choi , T. M. Crawford , S. Dodelson , T. F. Eifler , O. Friedrich , D. Gruen , G. P. Holder , B. Jain , M. Jarvis , N. MacCrann , A. Nicola , S. Pandey , J. Prat , C. L. Reichardt , S. Samuroff , C. Sánchez , L. F. Secco , E. Sheldon , M. A. Troxel , J. Zuntz , T. M. C. Abbott , F. B. Abdalla , J. Annis , S. Avila , K. Bechtol , B. A. Benson , E. Bertin , D. Brooks , E. Buckley-Geer , D. L. Burke , A. Carnero Rosell , M. Carrasco Kind , J. Carretero , F. J. Castander , R. Cawthon , C. E. Cunha , C. B. D'Andrea , L. N. da Costa , C. Davis , J. De Vicente , D. L. DePoy , H. T. Diehl , P. Doel , J. Estrada , A. E. Evrard , B. Flaugher , P. Fosalba , J. Frieman , J. García-Bellido , E. Gaztanaga , D. W. Gerdes , R. A. Gruendl , J. Gschwend , G. Gutierrez , W. G. Hartley , D. Hollowood , B. Hoyle , D. J. James , S. Kent , K. Kuehn , N. Kuropatkin , O. Lahav , M. Lima , M. A. G. Maia , M. March , J. L. Marshall , P. Melchior , F. Menanteau , R. Miquel , A. A. Plazas , A. Roodman , E. S. Rykoff , E. Sanchez , R. Schindler , M. Schubnell , I. Sevilla-Noarbe , M. Smith , R. C. Smith , M. Soares-Santos , F. Sobreira , E. Suchyta , M. E. C. Swanson , G. Tarle , A. R. Walker , W. L. K. Wu , J. Weller

Chromatic Effects on the PSF and Shear Measurement for the Roman Space Telescope High-Latitude Wide Area Survey

Weak gravitational lensing (WL) is a key cosmological probe that requires precise measurement of galaxy images to infer shape distortions, or shear, and constrain cosmology. Accurate estimation of the Point Spread Function (PSF) is crucial…

Cosmology and Nongalactic Astrophysics · Physics 2025-08-28 Federico Berlfein , Rachel Mandelbaum , Xiangchong Li , Tianqing Zhang , Scott Dodelson , Katarina Markovic

Superresolution Reconstruction of Severely Undersampled Point-spread Functions Using Point-source Stacking and Deconvolution

Point-spread function (PSF) estimation in spatially undersampled images is challenging because large pixels average fine-scale spatial information. This is problematic when fine-resolution details are necessary, as in optimal photometry…

Instrumentation and Methods for Astrophysics · Physics 2021-02-03 Teresa Symons , Michael Zemcov , James Bock , Yun-Ting Cheng , Brendan Crill , Christopher Hirata , Stephanie Venuto

Cosmology constraints from shear peak statistics in Dark Energy Survey Science Verification data

Shear peak statistics has gained a lot of attention recently as a practical alternative to the two point statistics for constraining cosmological parameters. We perform a shear peak statistics analysis of the Dark Energy Survey (DES)…

Cosmology and Nongalactic Astrophysics · Physics 2016-08-31 T. Kacprzak , D. Kirk , O. Friedrich , A. Amara , A. Refregier , L. Marian , J. P. Dietrich , E. Suchyta , J. Aleksić , D. Bacon , M. R. Becker , C. Bonnett , S. L. Bridle , C. Chang , T. F. Eifler , W. Hartley , E. M. Huff , E. Krause , N. MacCrann , P. Melchior , A. Nicola , S. Samuroff , E. Sheldon , M. A. Troxel , J. Weller , J. Zuntz , T. M. C. Abbott , F. B. Abdalla , R. Armstrong , A. Benoit-Lévy , R. A. Bernstein , E. Bertin , D. Brooks , D. L. Burke , A. Carnero Rosell , M. Carrasco Kind , J. Carretero , F. J. Castander , M. Crocce , C. B. D'Andrea , L. N. da Costa , S. Desai , H. T. Diehl , A. E. Evrard , A. Fausti Neto , B. Flaugher , P. Fosalba , J. Frieman , D. W. Gerdes , D. A. Goldstein , D. Gruen , R. A. Gruendl , G. Gutierrez , K. Honscheid , D. J. James , K. Kuehn , N. Kuropatkin , O. Lahav , M. Lima , M. March , J. L. Marshall , P. Martini , C. J. Miller , R. Miquel , J. J. Mohr , R. C. Nichol , B. Nord , A. A. Plazas , A. K. Romer , A. Roodman , E. S. Rykoff , E. Sanchez , V. Scarpine , M. Schubnell , I. Sevilla-Noarbe , R. C. Smith , M. Soares-Santos , F. Sobreira , M. E. C. Swanson , G. Tarle , D. Thomas , V. Vikram , A. R. Walker , Y. Zhang

Computation and validation of two-dimensional PSF simulation based on physical optics

The Point Spread Function (PSF) is a key figure of merit for specifying the angular resolution of optical systems and, as the demand for higher and higher angular resolution increases, the problem of surface finishing must be taken…

Instrumentation and Methods for Astrophysics · Physics 2016-10-04 K. Tayabaly , D. Spiga , G. Sironi , R. Canestrari , M. Lavagna , G. Pareschi

Photometric redshift analysis in the Dark Energy Survey Science Verification data

We present results from a study of the photometric redshift performance of the Dark Energy Survey (DES), using the early data from a Science Verification (SV) period of observations in late 2012 and early 2013 that provided science-quality…

Instrumentation and Methods for Astrophysics · Physics 2014-10-15 C. Sánchez , M. Carrasco Kind , H. Lin , R. Miquel , F. B. Abdalla , A. Amara , M. Banerji , C. Bonnett , R. Brunner , D. Capozzi , A. Carnero , F. J. Castander , L. A. N. da Costa , C. Cunha , A. Fausti , D. Gerdes , N. Greisel , J. Gschwend , W. Hartley , S. Jouvel , O. Lahav , M. Lima , M. A. G. Maia , P. Martí , R. L. C. Ogando , F. Ostrovski , P. Pellegrini , M. M. Rau , I. Sadeh , S. Seitz , I. Sevilla-Noarbe , A. Sypniewski , J. de Vicente , T. Abbot , S. S. Allam , D. Atlee , G. Bernstein , J. P. Bernstein , E. Buckley-Geer , D. Burke , M. J. Childress , T. Davis , D. L. DePoy , A. Dey , S. Desai , H. T. Diehl , P. Doel , J. Estrada , A. Evrard , E. Fernández , D. Finley , B. Flaugher , E. Gaztanaga , K. Glazebrook , K. Honscheid , A. Kim , K. Kuehn , N. Kuropatkin , C. Lidman , M. Makler , J. L. Marshall , R. C. Nichol , A. Roodman , E. Sánchez , B. X. Santiago , M. Sako , R. Scalzo , R. C. Smith , M. E. C. Swanson , G. Tarle , D. Thomas , D. L. Tucker , S. A. Uddin , F. Valdés , A. Walker , F. Yuan , J. Zuntz

Dark Energy Survey Year 3 Results: Multi-Probe Modeling Strategy and Validation

This paper details the modeling pipeline and validates the baseline analysis choices of the DES Year 3 joint analysis of galaxy clustering and weak lensing (a so-called "3$\times$2pt" analysis). These analysis choices include the specific…

Cosmology and Nongalactic Astrophysics · Physics 2021-05-31 E. Krause , X. Fang , S. Pandey , L. F. Secco , O. Alves , H. Huang , J. Blazek , J. Prat , J. Zuntz , T. F. Eifler , N. MacCrann , J. DeRose , M. Crocce , A. Porredon , B. Jain , M. A. Troxel , S. Dodelson , D. Huterer , A. R. Liddle , C. D. Leonard , A. Amon , A. Chen , J. Elvin-Poole , A. Ferté , J. Muir , Y. Park , S. Samuroff , A. Brandao-Souza , N. Weaverdyck , G. Zacharegkas , R. Rosenfeld , A. Campos , P. Chintalapati , A. Choi , E. Di Valentino , C. Doux , K. Herner , P. Lemos , J. Mena-Fernández , Y. Omori , M. Paterno , M. Rodriguez-Monroy , P. Rogozenski , R. P. Rollins , A. Troja , I. Tutusaus , R. H. Wechsler , T. M. C. Abbott , M. Aguena , S. Allam , F. Andrade-Oliveira , J. Annis , D. Bacon , E. Baxter , K. Bechtol , G. M. Bernstein , D. Brooks , E. Buckley-Geer , D. L. Burke , A. Carnero Rosell , M. Carrasco Kind , J. Carretero , F. J. Castander , R. Cawthon , C. Chang , M. Costanzi , L. N. da Costa , M. E. S. Pereira , J. De Vicente , S. Desai , H. T. Diehl , P. Doel , S. Everett , A. E. Evrard , I. Ferrero , B. Flaugher , P. Fosalba , J. Frieman , J. García-Bellido , E. Gaztanaga , D. W. Gerdes , T. Giannantonio , D. Gruen , R. A. Gruendl , J. Gschwend , G. Gutierrez , W. G. Hartley , S. R. Hinton , D. L. Hollowood , K. Honscheid , B. Hoyle , E. M. Huff , D. J. James , K. Kuehn , N. Kuropatkin , O. Lahav , M. Lima , M. A. G. Maia , J. L. Marshall , P. Martini , P. Melchior , F. Menanteau , R. Miquel , J. J. Mohr , R. Morgan , J. Myles , A. Palmese , F. Paz-Chinchón , D. Petravick , A. Pieres , A. A. Plazas Malagón , E. Sanchez , V. Scarpine , M. Schubnell , S. Serrano , I. Sevilla-Noarbe , M. Smith , M. Soares-Santos , E. Suchyta , G. Tarle , D. Thomas , C. To , T. N. Varga , J. Weller

The Effective Number Density of Galaxies for Weak Lensing Measurements in the LSST Project

Future weak lensing surveys potentially hold the highest statistical power for constraining cosmological parameters compared to other cosmological probes. The statistical power of a weak lensing survey is determined by the sky coverage, the…

Cosmology and Nongalactic Astrophysics · Physics 2017-12-05 C. Chang , M. Jarvis , B. Jain , S. M. Kahn , D. Kirkby , A. Connolly , S. Krughoff , E. Peng , J. R. Peterson

Breaking the degeneracy in stellar spectral classification from single wide-band images

The spectral energy distribution (SED) of observed stars in wide-field images is crucial for chromatic point spread function (PSF) modelling methods, which use unresolved stars as integrated spectral samples of the PSF across the field of…

Instrumentation and Methods for Astrophysics · Physics 2025-02-19 Ezequiel Centofanti , Samuel Farrens , Jean-Luc Starck , Tobias Liaudat , Alex Szapiro , Jennifer Pollack

TiDy-PSFs: Computational Imaging with Time-Averaged Dynamic Point-Spread-Functions

Point-spread-function (PSF) engineering is a powerful computational imaging techniques wherein a custom phase mask is integrated into an optical system to encode additional information into captured images. Used in combination with deep…

Computer Vision and Pattern Recognition · Computer Science 2023-03-31 Sachin Shah , Sakshum Kulshrestha , Christopher A. Metzler

High-resolution weak lensing mass mapping from DES-Y3 data using diffusion-based prior

High-resolution mapping of cosmic mass distribution is essential for a variety of astrophysical applications including understanding cosmic structure formation, and galaxy formation and evolution. However dark matter is not directly…

Cosmology and Nongalactic Astrophysics · Physics 2025-11-19 Supranta S. Boruah , Michael Jacob , Bhuvnesh Jain , Riya Maiya , Raghav Venkataramanan

The Shear TEsting Programme 2: Factors affecting high precision weak lensing analyses

The Shear TEsting Programme (STEP) is a collaborative project to improve the accuracy and reliability of weak lensing measurement, in preparation for the next generation of wide-field surveys. We review sixteen current and emerging shear…

Astrophysics · Physics 2008-11-26 Richard Massey , Catherine Heymans , Joel Berge , Gary Bernstein , Sarah Bridle , Douglas Clowe , Hakon Dahle , Richard Ellis , Thomas Erben , Marco Hetterscheidt , F. William High , Christopher Hirata , Henk Hoekstra , Patrick Hudelot , Mike Jarvis , David Johnston , Konrad Kuijken , Vera Margoniner , Rachel Mandelbaum , Yannick Mellier , Reiko Nakajima , Stephane Paulin-Henriksson , Molly Peeples , Chris Roat , Alexandre Refregier , Jason Rhodes , Tim Schrabback , Mischa Schirmer , Uros Seljak , Elisabetta Semboloni , Ludovic Van Waerbeke

A fast empirical method for galaxy shape measurements in weak lensing surveys

We describe a simple and fast method to correct ellipticity measurements of galaxies from the distortion by the instrumental and atmospheric point spread function (PSF), in view of weak lensing shear measurements. The method performs a…

Cosmology and Nongalactic Astrophysics · Physics 2012-08-01 M. Tewes , N. Cantale , F. Courbin , T. D. Kitching , G. Meylan

Overview of the Instrumentation for the Dark Energy Spectroscopic Instrument

The Dark Energy Spectroscopic Instrument (DESI) has embarked on an ambitious five-year survey to explore the nature of dark energy with spectroscopy of 40 million galaxies and quasars. DESI will determine precise redshifts and employ the…

Instrumentation and Methods for Astrophysics · Physics 2023-03-15 B. Abareshi , J. Aguilar , S. Ahlen , Shadab Alam , David M. Alexander , R. Alfarsy , L. Allen , C. Allende Prieto , O. Alves , J. Ameel , E. Armengaud , J. Asorey , Alejandro Aviles , S. Bailey , A. Balaguera-Antolínez , O. Ballester , C. Baltay , A. Bault , S. F. Beltran , B. Benavides , S. BenZvi , A. Berti , R. Besuner , Florian Beutler , D. Bianchi , C. Blake , P. Blanc , R. Blum , A. Bolton , S. Bose , D. Bramall , S. Brieden , A. Brodzeller , D. Brooks , C. Brownewell , E. Buckley-Geer , R. N. Cahn , Z. Cai , R. Canning , A. Carnero Rosell , P. Carton , R. Casas , F. J. Castander , J. L. Cervantes-Cota , S. Chabanier , E. Chaussidon , C. Chuang , C. Circosta , S. Cole , A. P. Cooper , L. da Costa , M. -C. Cousinou , A. Cuceu , T. M. Davis , K. Dawson , R. de la Cruz-Noriega , A. de la Macorra , A. de Mattia , J. Della Costa , P. Demmer , M. Derwent , A. Dey , B. Dey , G. Dhungana , Z. Ding , C. Dobson , P. Doel , J. Donald-McCann , J. Donaldson , K. Douglass , Y. Duan , P. Dunlop , J. Edelstein , S. Eftekharzadeh , D. J. Eisenstein , M. Enriquez-Vargas , S. Escoffier , M. Evatt , P. Fagrelius , X. Fan , K. Fanning , V. A. Fawcett , S. Ferraro , J. Ereza , B. Flaugher , A. Font-Ribera , J. E. Forero-Romero , C. S. Frenk , S. Fromenteau , B. T. Gänsicke , C. Garcia-Quintero , L. Garrison , E. Gaztañaga , F. Gerardi , H. Gil-Marín , S. Gontcho A Gontcho , Alma X. Gonzalez-Morales , G. Gonzalez-de-Rivera , V. Gonzalez-Perez , C. Gordon , O. Graur , D. Green , C. Grove , D. Gruen , G. Gutierrez , J. Guy , C. Hahn , S. Harris , D. Herrera , Hiram K. Herrera-Alcantar , K. Honscheid , C. Howlett , D. Huterer , V. Iršič , M. Ishak , P. Jelinsky , L. Jiang , J. Jimenez , Y. P. Jing , R. Joyce , E. Jullo , S. Juneau , N. G. Karaçaylı , M. Karamanis , A. Karcher , T. Karim , R. Kehoe , S. Kent , D. Kirkby , T. Kisner , F. Kitaura , S. E. Koposov , A. Kovács , A. Kremin , Alex Krolewski , B. L'Huillier , O. Lahav , A. Lambert , C. Lamman , Ting-Wen Lan , M. Landriau , S. Lane , D. Lang , J. U. Lange , J. Lasker , L. Le Guillou , A. Leauthaud , A. Le Van Suu , Michael E. Levi , T. S. Li , C. Magneville , M. Manera , Christopher J. Manser , B. Marshall , W. McCollam , P. McDonald , Aaron M. Meisner , J. Mena-Fernández M. Mezcua , T. Miller , R. Miquel , P. Montero-Camacho , J. Moon , J. Paul Martini , J. Meneses-Rizo , J. Moustakas , E. Mueller , Andrea Muñoz-Gutiérrez , Adam D. Myers , S. Nadathur , J. Najita , L. Napolitano , E. Neilsen , Jeffrey A. Newman , J. D. Nie , Y. Ning , G. Niz , P. Norberg , Hernán E. Noriega , T. O'Brien , A. Obuljen , N. Palanque-Delabrouille , A. Palmese , P. Zhiwei , D. Pappalardo , X. Peng , W. J. Percival , S. Perruchot , R. Pogge , C. Poppett , A. Porredon , F. Prada , J. Prochaska , R. Pucha , A. Pérez-Fernández , I. Pérez-Ráfols , D. Rabinowitz , A. Raichoor , S. Ramirez-Solano , César Ramírez-Pérez , C. Ravoux , K. Reil , M. Rezaie , A. Rocher , C. Rockosi , N. A. Roe , A. Roodman , A. J. Ross , G. Rossi , R. Ruggeri , V. Ruhlmann-Kleider , C. G. Sabiu , S. Safonova , K. Said , A. Saintonge , Javier Salas Catonga , L. Samushia , E. Sanchez , C. Saulder , E. Schaan , E. Schlafly , D. Schlegel , J. Schmoll , D. Scholte , M. Schubnell , A. Secroun , H. Seo , S. Serrano , Ray M. Sharples , Michael J. Sholl , Joseph Harry Silber , D. R. Silva , M. Sirk , M. Siudek , A. Smith , D. Sprayberry , R. Staten , B. Stupak , T. Tan , Gregory Tarlé , Suk Sien Tie , R. Tojeiro , L. A. Ureña-López , F. Valdes , O. Valenzuela , M. Valluri , M. Vargas-Magaña , L. Verde , M. Walther , B. Wang , M. S. Wang , B. A. Weaver , C. Weaverdyck , R. Wechsler , Michael J. Wilson , J. Yang , Y. Yu , S. Yuan , Christophe Yèche , H. Zhang , K. Zhang , Cheng Zhao , Rongpu Zhou , Zhimin Zhou , H. Zou , J. Zou , S. Zou , Y. Zu

Point-spread function reconstruction of adaptive-optics imaging: Meeting the astrometric requirements for time-delay cosmography

Astrometric precision and knowledge of the point spread function are key ingredients for a wide range of astrophysical studies including time-delay cosmography in which strongly lensed quasar systems are used to determine the Hubble…

Instrumentation and Methods for Astrophysics · Physics 2021-09-22 Geoff C. -F. Chen , Tommaso Treu , Christopher D. Fassnacht , Sam Ragland , Thomas Schmidt , Sherry H. Suyu

The Stability of the Point Spread Function of the Advanced Camera for Surveys on the Hubble Space Telescope and Implications for Weak Gravitational Lensing

(abridged) We examine the spatial and temporal stability of the HST ACS Wide Field Camera (WFC) point spread function (PSF) using the two square degree COSMOS survey. We show that stochastic aliasing of the PSF necessarily occurs during…

Astrophysics · Physics 2009-11-13 Jason D. Rhodes , Richard Massey , Justin Albert , Nicholas Collins , Richard S. Ellis , Catherine Heymans , Jonathan P. Gardner , Jean-Paul Kneib , Anton Koekemoer , Alexie Leauthaud , Yannick Mellier , Alexandre Refregier , James E. Taylor , Ludovic Van Waerbeke

Weak gravitational lensing shear measurement with FPFS: analytical mitigation of noise bias and selection bias

Dedicated 'Stage IV' observatories will soon observe the entire extragalactic sky, to measure the 'cosmic shear' distortion of galaxy shapes by weak gravitational lensing. To measure the apparent shapes of those galaxies, we present an…

Cosmology and Nongalactic Astrophysics · Physics 2022-02-08 Xiangchong Li , Yin Li , Richard Massey

PSF Anisotropy and Systematic Errors in Weak Lensing Surveys

Given the basic parameters of a cosmic shear weak lensing survey, how well can systematic errors due to anisotropy in the point spread function (PSF) be corrected? The largest source of error in this correction to date has been the…

Astrophysics · Physics 2009-11-13 Bhuvnesh Jain , Mike Jarvis , Gary Bernstein

The Dark Energy Survey Supernova Program: Light curves and 5-Year data release

We present $griz$ photometric light curves for the full 5 years of the Dark Energy Survey Supernova program (DES-SN), obtained with both forced Point Spread Function (PSF) photometry on Difference Images (DIFFIMG) performed during survey…

Cosmology and Nongalactic Astrophysics · Physics 2024-06-10 B. O. Sánchez , D. Brout , M. Vincenzi , M. Sako , K. Herner , R. Kessler , T. M. Davis , D. Scolnic , M. Acevedo , J. Lee , A. Möller , H. Qu , L. Kelsey , P. Wiseman , P. Armstrong , B. Rose , R. Camilleri , R. Chen , L. Galbany , E. Kovacs , C. Lidman , B. Popovic , M. Smith , M. Sullivan , M. Toy , D. Carollo , K. Glazebrook , G. F. Lewis , R. C. Nichol , B. E. Tucker , T. M. C. Abbott , M. Aguena , S. Allam , O. Alves , J. Annis , J. Asorey , S. Avila , D. Bacon , D. Brooks , D. L. Burke , A. Carnero Rosell , J. Carretero , F. J. Castander , L. N. da Costa , J. Duarte , M. E. S. Pereira , S. Desai , H. T. Diehl , S. Everett , I. Ferrero , B. Flaugher , J. Frieman , J. García-Bellido , M. Gatti , E. Gaztanaga , G. Giannini , R. A. Gruendl , G. Gutierrez , S. R. Hinton , D. L. Hollowood , K. Honscheid , D. J. James , K. Kuehn , O. Lahav , S. Lee , H. Lin , J. L. Marshall , J. Mena-Fernández , R. Miquel , J. Myles , A. Palmese , A. Pieres , A. A. Plazas Malagón , A. Porredon , A. K. Romer , E. Sanchez , D. Sanchez Cid , I. Sevilla-Noarbe , E. Suchyta , M. E. C. Swanson , G. Tarle , D. L. Tucker , V. Vikram , A. R. Walker , N. Weaverdyck

$\texttt{SBi3PCF:}$ Simulation-based inference with the integrated 3PCF

We present $\texttt{SBi3PCF}$, a simulation-based inference (SBI) framework for analysing a higher-order weak lensing statistic, the integrated 3-point correlation function (i3PCF). Our approach forward-models the cosmic shear field using…

Cosmology and Nongalactic Astrophysics · Physics 2025-10-27 David Gebauer , Anik Halder , Stella Seitz , Dhayaa Anbajagane