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We present initial results from the Dark Energy Spectroscopic Instrument (DESI) Complete Calibration of the Color-Redshift Relation (DC3R2) secondary target survey. Our analysis uses 230k galaxies that overlap with KiDS-VIKING $ugriZYJHK_s$…

The Dark Energy Spectroscopic Instrument (DESI), a multiplexed fiber-fed spectrograph, is a Stage-IV ground-based dark energy experiment aiming to measure redshifts for 29 million Emission-Line Galaxies (ELG), 4 million Luminous Red…

Cosmology and Nongalactic Astrophysics · Physics 2017-04-12 Lucas Pinol , Robert N. Cahn , Nick Hand , Uros Seljak , Martin White

Many scientific goals for the Dark Energy Survey (DES) require calibration of optical/NIR broadband $b = grizY$ photometry that is stable in time and uniform over the celestial sky to one percent or better. It is also necessary to limit to…

The Dark Energy Spectroscopic Instrument (DESI) in its first Data Release (DR1) already provides more than 100,000 galaxies with relative distance measurements. The primary purpose of this paper is to perform the calibration of the…

We explore the science prospects of a 14,000 deg$^2$ Kinematic Lensing (KL) survey with the Dark Energy Spectroscopic Instrument (DESI) and overlapping imaging surveys. KL infers the cosmic shear signal by jointly forward modeling the…

Cosmology and Nongalactic Astrophysics · Physics 2024-07-31 Jiachuan Xu , Tim Eifler , Eason Wang , Elisabeth Krause , Spencer Everett , Eric Huff , Pranjal R. S. , Yu-Hsiu Huang

Combining different observational probes, such as galaxy clustering and weak lensing, is a promising technique for unveiling the physics of the Universe with upcoming dark energy experiments. The galaxy redshift sample from the Dark Energy…

We describe the creation, content, and validation of the Dark Energy Survey (DES) internal year-one cosmology data set, Y1A1 GOLD, in support of upcoming cosmological analyses. The Y1A1 GOLD data set is assembled from multiple epochs of DES…

The effective redshift distribution $n(z)$ of galaxies is a critical component in the study of weak gravitational lensing. Here, we introduce a new method for determining $n(z)$ for weak lensing surveys based on high-quality redshifts and…

Strong lensing gravitational time delays are a powerful and cost effective probe of dark energy. Recent studies have shown that a single lens can provide a distance measurement with 6-7 % accuracy (including random and systematic…

A modified version of the folded aplanatic Gregory telescope equipped with a spherical two-lens corrector is proposed for observations requiring a high signal-to-noise ratio. The basic telescope model has an aperture of 400 mm (f/3.0), its…

Instrumentation and Methods for Astrophysics · Physics 2017-12-06 V. Yu. Terebizh

We present constraints on models of cosmology and astrophysics using cosmic shear data vectors from three datasets: the northern and southern Galactic cap of the Dark Energy Camera All Data Everywhere (DECADE) project, and the Dark Energy…

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…

We present the stellar value-added catalogue based on the Dark Energy Spectroscopic Instrument (DESI) Early Data Release. The catalogue contains radial velocity and stellar parameter measurements for $\simeq$ 400,000 unique stars observed…

MSE is an 11.25m aperture observatory with a 1.5 square degree field of view that will be fully dedicated to multi-object spectroscopy. More than 3200 fibres will feed spectrographs operating at low (R ~ 2000 - 3500) and moderate (R ~ 6000)…

Instrumentation and Methods for Astrophysics · Physics 2016-06-02 Alan McConnachie , Carine Babusiaux , Michael Balogh , Simon Driver , Pat Côté , Helene Courtois , Luke Davies , Laura Ferrarese , Sarah Gallagher , Rodrigo Ibata , Nicolas Martin , Aaron Robotham , Kim Venn , Eva Villaver , Jo Bovy , Alessandro Boselli , Matthew Colless , Johan Comparat , Kelly Denny , Pierre-Alain Duc , Sara Ellison , Richard de Grijs , Mirian Fernandez-Lorenzo , Ken Freeman , Raja Guhathakurta , Patrick Hall , Andrew Hopkins , Mike Hudson , Andrew Johnson , Nick Kaiser , Jun Koda , Iraklis Konstantopoulos , George Koshy , Khee-Gan Lee , Adi Nusser , Anna Pancoast , Eric Peng , Celine Peroux , Patrick Petitjean , Christophe Pichon , Bianca Poggianti , Carlo Schmid , Prajval Shastri , Yue Shen , Chris Willot , Scott Croom , Rosine Lallement , Carlo Schimd , Dan Smith , Matthew Walker , Jon Willis , Alessandro Bosselli Matthew Colless , Aruna Goswami , Matt Jarvis , Eric Jullo , Jean-Paul Kneib , Iraklis Konstantopoloulous , Jeff Newman , Johan Richard , Firoza Sutaria , Edwar Taylor , Ludovic van Waerbeke , Giuseppina Battaglia , Pat Hall , Misha Haywood , Charli Sakari , Carlo Schmid , Arnaud Seibert , Sivarani Thirupathi , Yuting Wang , Yiping Wang , Ferdinand Babas , Steve Bauman , Elisabetta Caffau , Mary Beth Laychak , David Crampton , Daniel Devost , Nicolas Flagey , Zhanwen Han , Clare Higgs , Vanessa Hill , Kevin Ho , Sidik Isani , Shan Mignot , Rick Murowinski , Gajendra Pandey , Derrick Salmon , Arnaud Siebert , Doug Simons , Else Starkenburg , Kei Szeto , Brent Tully , Tom Vermeulen , Kanoa Withington , Nobuo Arimoto , Martin Asplund , Herve Aussel , Michele Bannister , Harish Bhatt , SS Bhargavi , John Blakeslee , Joss Bland-Hawthorn , James Bullock , Denis Burgarella , Tzu-Ching Chang , Andrew Cole , Jeff Cooke , Andrew Cooper , Paola Di Matteo , Ginevra Favole , Hector Flores , Bryan Gaensler , Peter Garnavich , Karoline Gilbert , Rosa Gonzalez-Delgado , Puragra Guhathakurta , Guenther Hasinger , Falk Herwig , Narae Hwang , Pascale Jablonka , Matthew Jarvis , Umanath Kamath , Lisa Kewley , Damien Le Borgne , Geraint Lewis , Robert Lupton , Sarah Martell , Mario Mateo , Olga Mena , David Nataf , Jeffrey Newman , Enrique Pérez , Francisco Prada , Mathieu Puech , Alejandra Recio-Blanco , Annie Robin , Will Saunders , Daniel Smith , C. S. Stalin , Charling Tao , Karun Thanjuvur , Laurence Tresse , Ludo van Waerbeke , Jian-Min Wang , David Yong , Gongbo Zhao , Patrick Boisse , James Bolton , Piercarlo Bonifacio , Francois Bouchy , Len Cowie , Katia Cunha , Magali Deleuil , Ernst de Mooij , Patrick Dufour , Sebastien Foucaud , Karl Glazebrook , John Hutchings , Chiaki Kobayashi , Rolf-Peter Kudritzki , Yang-Shyang Li , Lihwai Lin , Yen-Ting Lin , Martin Makler , Norio Narita , Changbom Park , Ryan Ransom , Swara Ravindranath , Bacham Eswar Reddy , Marcin Sawicki , Luc Simard , Raghunathan Srianand , Thaisa Storchi-Bergmann , Keiichi Umetsu , Ting-Gui Wang , Jong-Hak Woo , Xue-Bing Wu

The Dark Energy Survey (DES) is a project with the goal of building, installing and exploiting a new 74 CCD-camera at the Blanco telescope, in order to study the nature of cosmic acceleration. It will cover 5000 square degrees of the…

A key component of the Dark Energy Spectroscopic Instrument (DESI) survey validation (SV) is a detailed visual inspection (VI) of the optical spectroscopic data to quantify key survey metrics. In this paper we present results from VI of the…

We discuss the ground-breaking science that will be possible with a wide area survey, using the MeerKAT telescope, known as MeerKLASS (MeerKAT Large Area Synoptic Survey). The current specifications of MeerKAT make it a great fit for…

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