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The scale of ongoing and future electromagnetic surveys pose formidable challenges to classify astronomical objects. Pioneering efforts on this front include citizen science campaigns adopted by the Sloan Digital Sky Survey (SDSS). SDSS…

天体物理仪器与方法 · 物理学 2019-07-09 Asad Khan , E. A. Huerta , Sibo Wang , Robert Gruendl , Elise Jennings , Huihuo Zheng

Statistical weak lensing by large-scale structure -- cosmic shear -- is a promising cosmological tool, which has motivated the design of several large upcoming surveys. Here, we present a measurement of cosmic shear using coadded Sloan…

宇宙学与河外天体物理 · 物理学 2011-12-15 Eric M. Huff , Tim Eifler , Christopher M. Hirata , Rachel Mandelbaum , David Schlegel , Uros Seljak

We report the observation and confirmation of the first group- and cluster-scale strong gravitational lensing systems found in Dark Energy Survey (DES) data. Through visual inspection of data from the Science Verification (SV) season, we…

As the statistical power of galaxy weak lensing reaches percent level precision, large, realistic and robust simulations are required to calibrate observational systematics, especially given the increased importance of object blending as…

We describe the first public data release of the Dark Energy Survey, DES DR1, consisting of reduced single epoch images, coadded images, coadded source catalogs, and associated products and services assembled over the first three years of…

天体物理仪器与方法 · 物理学 2019-04-24 T. M. C. Abbott , F. B. Abdalla , S. Allam , A. Amara , J. Annis , J. Asorey , S. Avila , O. Ballester , M. Banerji , W. Barkhouse , L. Baruah , M. Baumer , K. Bechtol , M . R. Becker , A. Benoit-Lévy , G. M. Bernstein , E. Bertin , J. Blazek , S. Bocquet , D. Brooks , D. Brout , E. Buckley-Geer , D. L. Burke , V. Busti , R. Campisano , L. Cardiel-Sas , A. C arnero Rosell , M. Carrasco Kind , J. Carretero , F. J. Castander , R. Cawthon , C. Chang , X. Chen , C. Conselice , G. Costa , M. Crocce , C. E. Cunha , C. B. D'Andrea , L. N. da Costa , R. Das , G. Daues , T. M. Davis , C. Davis , J. De Vicente , D. L. DePoy , J. DeRose , S. Desai , H. T. Diehl , J. P. Dietrich , S. Dodelson , P. Doel , A. Drlica-Wagner , T. F. Eifler , A. E. Elliott , A. E. Evrard , A. Farahi , A. Fausti Neto , E. Fernandez , D. A. Finley , M. Fitzpatrick , B. Flaugher , R. J. Foley , P. Fosalba , D. N. Friedel , J. Frieman , J. García-Bellido , E. Gaz tanaga , D. W. Gerdes , T. Giannantonio , M. S. S. Gill , K. Glazebrook , D. A. Goldstein , M. Gower , D. Gruen , R. A. Gruendl , J. Gschwend , R. R. Gupta , G. Gutierrez , S. Hamilton , W. G. Hartley , S. R. Hinton , J. M. Hislop , D. Hollowood , K. Honscheid , B. Hoyle , D. Huterer , B. Jain , D. J. James , T. Jeltema , M. W. G. Johnson , M. D. Johnson , S. Juneau , T. Kacprzak , S. Kent , G. Khullar , M. Klein , A. Kovacs , A. M. G. Koziol , E. Krause , A. Kremin , R. Kron , K. Kuehn , S. Kuhlmann , N. Kuropatkin , O. Lahav , J. Lasker , T. S. Li , R. T. Li , A. R. Liddle , M. Lima , H. Lin , P. López-Reyes , N. MacCrann , M. A. G. Maia , J. D. Maloney , M. Manera , M. March , J. Marriner , J. L. Marshall , P. Martini , T. McClintock , T. McKay , R . G. McMahon , P. Melchior , F. Menanteau , C. J. Miller , R. Miquel , J. J. Mohr , E. Morganson , J. Mould , E. Neilsen , R. C. Nichol , D. Nidever , R. Nikutta , F. Nogueira , B. Nord , P. Nugent , L. Nunes , R. L. C. Ogando , L. Old , K. Olsen , A. B. Pace , A. Palmese , F. Paz-Chinchón , H. V. Peiris , W. J. Percival , D. Petravick , A. A. Plazas , J. Poh , C. Pond , A. Por redon , A. Pujol , A. Refregier , K. Reil , P. M. Ricker , R. P. Rollins , A. K. Romer , A. Roodman , P. Rooney , A. J. Ross , E. S. Rykoff , M. Sako , E. Sanchez , M. L. Sanchez , B. Santiago , A. Saro , V. Scarpine , D. Scolnic , A. Scott , S. Serrano , I. Sevilla-Noarbe , E. Sheldon , N. Shipp , M. L. Silveira , R. C. Smith , J. A. Smith , M. Smith , M. Soares-Santos , F. Sobre ira , J. Song , A. Stebbins , E. Suchyta , M. Sullivan , M. E. C. Swanson , G. Tarle , J. Thaler , D. Thomas , R. C. Thomas , M. A. Troxel , D. L. Tucker , V. Vikram , A. K. Vivas , A. R. Wal ker , R. H. Wechsler , J. Weller , W. Wester , R. C. Wolf , H. Wu , B. Yanny , A. Zenteno , Y. Zhang , J. Zuntz

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…

Deep optical and near-infrared imaging of the entire Galactic plane is essential for understanding our Galaxy's stars, gas, and dust. The second data release of the DECam Plane Survey (DECaPS2) extends the five-band optical and…

We present a cosmological analysis of the third-order aperture mass statistic using Dark Energy Survey Year 3 (DES Y3) data. We perform a complete tomographic measurement of the three-point correlation function of the Y3 weak lensing shape…

We characterize the variation in photometric response of the Dark Energy Camera (DECam) across its 520~Mpix science array during 4 years of operation. These variations are measured using high signal-to-noise aperture photometry of $>10^7$…

Galaxy clustering is a sensitive probe of the expansion history and growth of structure of the universe, and key degeneracies can be broken by combining these data with measurements of cosmic shear and galaxy-galaxy lensing (a so-called…

We study the accuracy with which weak lensing measurements could be made from a future space-based survey, predicting the subsequent precisions of 3-dimensional dark matter maps, projected 2-dimensional dark matter maps, and mass-selected…

Number counts of galaxy clusters across redshift are a powerful cosmological probe, if a precise and accurate reconstruction of the underlying mass distribution is performed -- a challenge called mass calibration. With the advent of wide…

宇宙学与河外天体物理 · 物理学 2024-07-17 S. Grandis , V. Ghirardini , S. Bocquet , C. Garrel , J. J. Mohr , A. Liu , M. Kluge , L. Kimmig , T. H. Reiprich , A. Alarcon , A. Amon , E. Artis , Y. E. Bahar , F. Balzer , K. Bechtol , M. R. Becker , G. Bernstein , E. Bulbul , A. Campos , A. Carnero Rosell , M. Carrasco Kind , R. Cawthon , C. Chang , R. Chen , I. Chiu , A. Choi , N. Clerc , J. Comparat , J. Cordero , C. Davis , J. Derose , H. T. Diehl , S. Dodelson , C. Doux , A. Drlica-Wagner , K. Eckert , J. Elvin-Poole , S. Everett , A. Ferte , M. Gatt , G. Giannini , P. Giles , D. Gruen , R. A. Gruendl , I. Harrison , W. G. Hartley , K. Herner , E. M. Huf , F. Kleinebreil , N. Kuropatkin , P. F. Leget , N. Maccrann , J. Mccullough , A. Merloni , J. Myles , K. Nandra , A. Navarro-Alsina , N. Okabe , F. Pacaud , S. Pandey , J. Prat , P. Predehl , M. Ramos , M. Raveri , R. P. Rollins , A. Roodman , A. J. Ross , E. S. Rykoff , C. Sanchez , J. Sanders , T. Schrabback , L. F. Secco , R. Seppi , I. Sevilla-Noarbe , E. Sheldon , T. Shin , M. Troxel , I. Tutusaus , T. N. Varga , H. Wu , B. Yanny , B. Yin , X. Zhang , Y. Zhang , O. Alves , S. Bhargava , D. Brooks , D. L. Burke , J. Carretero , M. Costanzi , L. N. da Costa , M. E. S. Pereira , J. De Vicente , S. Desai , P. Doel , I. Ferrero , B. Flaugher , D. Friedel , J. Frieman , J. García-Bellido , G. Gutierrez , S. R. Hinton , D. L. Hollowood , K. Honscheid , D. J. James , N. Jeffrey , O. Lahav , S. Lee , J. L. Marshall , F. Menanteau , R. L. C. Ogando , A. Pieres , A. A. Plazas Malagón , A. K. Romer , E. Sanchez , M. Schubnell , M. Smith , E. Suchyta , M. E. C. Swanson , G. Tarle , N. Weaverdyck , J. Weller

The Dark Energy Survey (DES) will be unprecedented in its ability to probe exceptionally large cosmic volumes to relatively faint optical limits. Primarily designed for the study of comparatively low redshift (z<2) galaxies with the aim of…

We perform a semi-automated search for strong gravitational lensing systems in the 9,000 deg$^2$ Dark Energy Camera Legacy Survey (DECaLS), part of the DESI Legacy Imaging Surveys (Dey et al.). The combination of the depth and breadth of…

We have developed a new technique called Direct Shear Mapping (DSM) to measure gravitational lensing shear directly from observations of a single background source. The technique assumes the velocity map of an un-lensed, stably-rotating…

宇宙学与河外天体物理 · 物理学 2015-05-26 Catherine O. de Burgh-Day , Edward N. Taylor , Rachel L. Webster , Andrew M. Hopkins

Weak gravitational lensing has the potential to select clusters independently of their baryon content, dynamical state, and star formation history. We present steps toward the first shear-selected sample of clusters, from the Deep Lens…

天体物理学 · 物理学 2007-05-23 V. E. Margoniner , the Deep Lens Survey Team

The Dark Energy Camera (DECam) is a sensitive, wide field instrument mounted at the prime focus of the 4 m V. Blanco Telescope in Chile. Beside its main objectives, i.e. understanding the growth and evolution of structures in the Universe,…

太阳与恒星天体物理 · 物理学 2023-04-18 A. Franco , A. A. Nucita , F. De Paolis , F. Strafella , S. Sacquegna