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We recommend a conceptual design study for a spectroscopic facility in the southern hemisphere comprising a large diameter telescope, fiber system, and spectrographs collectively optimized for massively-multiplexed spectroscopy. As a…

The Wide-field Spectroscopic Telescope (WST) is proposed as a new facility dedicated to the efficient delivery of spectroscopic surveys. This white paper summarises the initial concept as well as the corresponding science cases. WST will…

Instrumentation and Methods for Astrophysics · Physics 2024-04-15 Vincenzo Mainieri , Richard I. Anderson , Jarle Brinchmann , Andrea Cimatti , Richard S. Ellis , Vanessa Hill , Jean-Paul Kneib , Anna F. McLeod , Cyrielle Opitom , Martin M. Roth , Paula Sanchez-Saez , Rodolfo Smiljanic , Eline Tolstoy , Roland Bacon , Sofia Randich , Angela Adamo , Francesca Annibali , Patricia Arevalo , Marc Audard , Stefania Barsanti , Giuseppina Battaglia , Amelia M. Bayo Aran , Francesco Belfiore , Michele Bellazzini , Emilio Bellini , Maria Teresa Beltran , Leda Berni , Simone Bianchi , Katia Biazzo , Sofia Bisero , Susanna Bisogni , Joss Bland-Hawthorn , Stephane Blondin , Julia Bodensteiner , Henri M. J. Boffin , Rosaria Bonito , Giuseppe Bono , Nicolas F. Bouche , Dominic Bowman , Vittorio F. Braga , Angela Bragaglia , Marica Branchesi , Anna Brucalassi , Julia J. Bryant , Ian Bryson , Innocenza Busa , Stefano Camera , Carmelita Carbone , Giada Casali , Mark Casali , Viviana Casasola , Norberto Castro , Marcio Catelan , Lorenzo Cavallo , Cristina Chiappini , Maria-Rosa Cioni , Matthew Colless , Laura Colzi , Sofia Contarini , Warrick Couch , Filippo D'Ammando , William d'Assignies D. , Valentina D'Orazi , Ronaldo da Silva , Maria Giovanna Dainotti , Francesco Damiani , Camilla Danielski , Annalisa De Cia , Roelof S. de Jong , Suhail Dhawan , Philippe Dierickx , Simon P. Driver , Ulyana Dupletsa , Stephanie Escoffier , Ana Escorza , Michele Fabrizio , Giuliana Fiorentino , Adriano Fontana , Francesco Fontani , Daniel Forero Sanchez , Patrick Franois , Francisco Jose Galindo-Guil , Anna Rita Gallazzi , Daniele Galli , Miriam Garcia , Jorge Garcia-Rojas , Bianca Garilli , Robert Grand , Mario Giuseppe Guarcello , Nandini Hazra , Amina Helmi , Artemio Herrero , Daniela Iglesias , Dragana Ilic , Vid Irsic , Valentin D. Ivanov , Luca Izzo , Pascale Jablonka , Benjamin Joachimi , Darshan Kakkad , Sebastian Kamann , Sergey Koposov , Georges Kordopatis , Andjelka B. Kovacevic , Katarina Kraljic , Hanindyo Kuncarayakti , Yuna Kwon , Fiorangela La Forgia , Ofer Lahav , Clotilde Laigle , Monica Lazzarin , Ryan Leaman , Floriane Leclercq , Khee-Gan Lee , David Lee , Matt D. Lehnert , Paulina Lira , Eleonora Loffredo , Sara Lucatello , Laura Magrini , Kate Maguire , Guillaume Mahler , Fatemeh Zahra Majidi , Nicola Malavasi , Filippo Mannucci , Marcella Marconi , Nicolas Martin , Federico Marulli , Davide Massari , Tadafumi Matsuno , Jorryt Mattheee , Sean McGee , Jaroslav Merc , Thibault Merle , Andrea Miglio , Alessandra Migliorini , Ivan Minchev , Dante Minniti , Nuria Miret-Roig , Ana Monreal Ibero , Federico Montano , Ben T. Montet , Michele Moresco , Chiara Moretti , Lauro Moscardini , Andres Moya , Oliver Mueller , Themiya Nanayakkara , Matt Nicholl , Thomas Nordlander , Francesca Onori , Marco Padovani , Anna Francesca Pala , Swayamtrupta Panda , Mamta Pandey-Pommier , Luca Pasquini , Michal Pawlak , Priscila J. Pessi , Alice Pisani , Lukav C. Popovic , Loredana Prisinzano , Roberto Raddi , Monica Rainer , Alberto Rebassa-Mansergas , Johan Richard , Mickael Rigault , Antoine Rocher , Donatella Romano , Piero Rosati , Germano Sacco , Ruben Sanchez-Janssen , Andreas A. C. Sander , Jason L. Sanders , Mark Sargent , Elena Sarpa , Carlo Schimd , Pietro Schipani , Emiliano Sefusatti , Graham P. Smith , Lorenzo Spina , Matthias Steinmetz , Sandro Tacchella , Grazina Tautvaisiene , Christopher Theissen , Guillaume Thomas , Yuan-Sen Ting , Tony Travouillon , Laurence Tresse , Oem Trivedi , Maria Tsantaki , Maria Tsedrik , Tanya Urrutia , Elena Valenti , Mathieu Van der Swaelmen , Sophie Van Eck , Francesco Verdiani , Aurelien Verdier , Susanna Diana Vergani , Anne Verhamme , Joel Vernet , Giovanni Verza , Matteo Viel , Pauline Vielzeuf , Giustina Vietri , Jorick S. Vink , Carlos Viscasillas Vazquez , Hai-Feng Wang , Peter M. Weilbacher , Martin Wendt , Nicholas Wright , Quanzhi Ye , Christophe Yeche , Jiaxi Yu , Tayyaba Zafar , Stefano Zibetti , Bodo Ziegler , Igor Zinchenko

A survey that can cover the sky in optical bands over wide fields to faint magnitudes with a fast cadence will enable many of the exciting science opportunities of the next decade. The Large Synoptic Survey Telescope (LSST) will have an…

Instrumentation and Methods for Astrophysics · Physics 2012-08-27 LSST Science Collaboration , Paul A. Abell , Julius Allison , Scott F. Anderson , John R. Andrew , J. Roger P. Angel , Lee Armus , David Arnett , S. J. Asztalos , Tim S. Axelrod , Stephen Bailey , D. R. Ballantyne , Justin R. Bankert , Wayne A. Barkhouse , Jeffrey D. Barr , L. Felipe Barrientos , Aaron J. Barth , James G. Bartlett , Andrew C. Becker , Jacek Becla , Timothy C. Beers , Joseph P. Bernstein , Rahul Biswas , Michael R. Blanton , Joshua S. Bloom , John J. Bochanski , Pat Boeshaar , Kirk D. Borne , Marusa Bradac , W. N. Brandt , Carrie R. Bridge , Michael E. Brown , Robert J. Brunner , James S. Bullock , Adam J. Burgasser , James H. Burge , David L. Burke , Phillip A. Cargile , Srinivasan Chandrasekharan , George Chartas , Steven R. Chesley , You-Hua Chu , David Cinabro , Mark W. Claire , Charles F. Claver , Douglas Clowe , A. J. Connolly , Kem H. Cook , Jeff Cooke , Asantha Cooray , Kevin R. Covey , Christopher S. Culliton , Roelof de Jong , Willem H. de Vries , Victor P. Debattista , Francisco Delgado , Ian P. Dell'Antonio , Saurav Dhital , Rosanne Di Stefano , Mark Dickinson , Benjamin Dilday , S. G. Djorgovski , Gregory Dobler , Ciro Donalek , Gregory Dubois-Felsmann , Josef Durech , Ardis Eliasdottir , Michael Eracleous , Laurent Eyer , Emilio E. Falco , Xiaohui Fan , Christopher D. Fassnacht , Harry C. Ferguson , Yanga R. Fernandez , Brian D. Fields , Douglas Finkbeiner , Eduardo E. Figueroa , Derek B. Fox , Harold Francke , James S. Frank , Josh Frieman , Sebastien Fromenteau , Muhammad Furqan , Gaspar Galaz , A. Gal-Yam , Peter Garnavich , Eric Gawiser , John Geary , Perry Gee , Robert R. Gibson , Kirk Gilmore , Emily A. Grace , Richard F. Green , William J. Gressler , Carl J. Grillmair , Salman Habib , J. S. Haggerty , Mario Hamuy , Alan W. Harris , Suzanne L. Hawley , Alan F. Heavens , Leslie Hebb , Todd J. Henry , Edward Hileman , Eric J. Hilton , Keri Hoadley , J. B. Holberg , Matt J. Holman , Steve B. Howell , Leopoldo Infante , Zeljko Ivezic , Suzanne H. Jacoby , Bhuvnesh Jain , R , Jedicke , M. James Jee , J. Garrett Jernigan , Saurabh W. Jha , Kathryn V. Johnston , R. Lynne Jones , Mario Juric , Mikko Kaasalainen , Styliani , Kafka , Steven M. Kahn , Nathan A. Kaib , Jason Kalirai , Jeff Kantor , Mansi M. Kasliwal , Charles R. Keeton , Richard Kessler , Zoran Knezevic , Adam Kowalski , Victor L. Krabbendam , K. Simon Krughoff , Shrinivas Kulkarni , Stephen Kuhlman , Mark Lacy , Sebastien Lepine , Ming Liang , Amy Lien , Paulina Lira , Knox S. Long , Suzanne Lorenz , Jennifer M. Lotz , R. H. Lupton , Julie Lutz , Lucas M. Macri , Ashish A. Mahabal , Rachel Mandelbaum , Phil Marshall , Morgan May , Peregrine M. McGehee , Brian T. Meadows , Alan Meert , Andrea Milani , Christopher J. Miller , Michelle Miller , David Mills , Dante Minniti , David Monet , Anjum S. Mukadam , Ehud Nakar , Douglas R. Neill , Jeffrey A. Newman , Sergei Nikolaev , Martin Nordby , Paul O'Connor , Masamune Oguri , John Oliver , Scot S. Olivier , Julia K. Olsen , Knut Olsen , Edward W. Olszewski , Hakeem Oluseyi , Nelson D. Padilla , Alex Parker , Joshua Pepper , John R. Peterson , Catherine Petry , Philip A. Pinto , James L. Pizagno , Bogdan Popescu , Andrej Prsa , Veljko Radcka , M. Jordan Raddick , Andrew Rasmussen , Arne Rau , Jeonghee Rho , James E. Rhoads , Gordon T. Richards , Stephen T. Ridgway , Brant E. Robertson , Rok Roskar , Abhijit Saha , Ata Sarajedini , Evan Scannapieco , Terry Schalk , Rafe Schindler , Samuel Schmidt , Sarah Schmidt , Donald P. Schneider , German Schumacher , Ryan Scranton , Jacques Sebag , Lynn G. Seppala , Ohad Shemmer , Joshua D. Simon , M. Sivertz , Howard A. Smith , J. Allyn Smith , Nathan Smith , Anna H. Spitz , Adam Stanford , Keivan G. Stassun , Jay Strader , Michael A. Strauss , Christopher W. Stubbs , Donald W. Sweeney , Alex Szalay , Paula Szkody , Masahiro Takada , Paul Thorman , David E. Trilling , Virginia Trimble , Anthony Tyson , Richard Van Berg , Daniel Vanden Berk , Jake VanderPlas , Licia Verde , Bojan Vrsnak , Lucianne M. Walkowicz , Benjamin D. Wandelt , Sheng Wang , Yun Wang , Michael Warner , Risa H. Wechsler , Andrew A. West , Oliver Wiecha , Benjamin F. Williams , Beth Willman , David Wittman , Sidney C. Wolff , W. Michael Wood-Vasey , Przemek Wozniak , Patrick Young , Andrew Zentner , Hu Zhan

The workhorse instruments of the 8-10m class observatories have become their multi-object spectrographs (MOS), providing comprehensive follow-up to both ground-based and space-borne imaging. With the advent of deeper imaging surveys from,…

LSST will open new vistas for cosmology in the next decade, but it cannot reach its full potential without data from other telescopes. Cosmological constraints can be greatly enhanced using wide-field ($>20$ deg$^2$ total survey area),…

Single-object imaging and spectroscopy on telescopes with apertures ranging from ~4 m to 40 m have the potential to greatly enhance the cosmological constraints that can be obtained from LSST. Two major cosmological probes will benefit…

The wide-field spectroscopic survey telescope (WST) is proposed to become the next large optical/near infrared facility for the European Southern Observatory (ESO) once the Extremely Large Telescope (ELT) has become operational. While the…

Instrumentation and Methods for Astrophysics · Physics 2023-08-31 Roland Bacon , Martin M. Roth , Paola Amico , Eloy Hernandez , the WST Consortium

Community access to deep (i ~ 25), highly-multiplexed optical and near-infrared multi-object spectroscopy (MOS) on 8-40m telescopes would greatly improve measurements of cosmological parameters from LSST. The largest gain would come from…

Prospects for future supernova surveys are discussed, focusing on the ESA Euclid mission and the European Extremely Large Telescope(E-ELT), both expected to be in operation around the turn of the decade. Euclid is a 1.2m space survey…

Cosmology and Nongalactic Astrophysics · Physics 2015-06-12 I. M. Hook

The Large Synoptic Survey Telescope (LSST) surveys have initially been optimized to omit the inner part of the Milky Way disk/bar from deep and cadence observations. However it is now clear that the LSST will be powerful for Galactic…

Instrumentation and Methods for Astrophysics · Physics 2018-08-22 R. Michael Rich

Recent advances in astronomical observations have ushered in an era of remarkable discoveries. We now probe the Universe through multi-messenger signals, image the sky with unprecedented depth and resolution, and investigate individual…

Instrumentation and Methods for Astrophysics · Physics 2026-05-12 Zheng Cai , Song Huang , Yu Liu , Cheng Zhao , Lei Huang

In 2006 ESO Council authorized a Phase B study of a European AO-telescope with a 42 m segmented primary with a 5-mirror design, the E-ELT. Several reports and working groups have already presented science cases for an E-ELT, specifically…

Astrophysics of Galaxies · Physics 2015-05-18 Nils Ryde

This white paper is the result of the Tri-Agency Working Group (TAG) appointed to develop synergies between missions and is intended to clarify what LSST observations are needed in order to maximally enhance the combined science output of…

A large wide-field telescope and camera with optical throughput over 200 m^2 deg^2 -- a factor of 50 beyond what we currently have -- would enable the detection of faint moving or bursting optical objects: from Earth threatening asteroids…

Astrophysics · Physics 2009-11-07 J. Anthony Tyson , the LSST Collaboration

WST - Widefield Spectroscopic Telescope: We summarise the design challenges of instrumentation for a proposed 12m class Telescope that aims to provide a large (>2.5 square degree) field of view and enable simultaneous Multi-object (> 20,000…

There are 8000 galaxies, including 1600 at z larger than 1.6, which could be simultaneously observed in an E-ELT field of view of 40 sq. arcmin. A considerable fraction of astrophysical discoveries require large statistical samples, which…

Instrumentation and Methods for Astrophysics · Physics 2016-09-07 F. Hammer , S. Morris , L. Kaper , B. Barbuy , J. G. Cuby , M. Roth , P. Jagourel , C. J. Evans , M. Puech , E. Fitzsimons , G. Dalton , M. Rodrigues

The Large Synoptic Survey Telescope (LSST) is a wide-field imaging system of unprecedented etendue. The initial goal of the project is to carry out a ten year imaging survey in six broad passbands (ugrizy) that cover $350 nm < \lambda < 1.1…

Instrumentation and Methods for Astrophysics · Physics 2019-05-14 Christopher W. Stubbs , Katrin Heitmann

(Abridged) We describe here the most ambitious survey currently planned in the optical, the Large Synoptic Survey Telescope (LSST). A vast array of science will be enabled by a single wide-deep-fast sky survey, and LSST will have unique…

Astrophysics · Physics 2019-08-13 Željko Ivezić , Steven M. Kahn , J. Anthony Tyson , Bob Abel , Emily Acosta , Robyn Allsman , David Alonso , Yusra AlSayyad , Scott F. Anderson , John Andrew , James Roger P. Angel , George Z. Angeli , Reza Ansari , Pierre Antilogus , Constanza Araujo , Robert Armstrong , Kirk T. Arndt , Pierre Astier , Éric Aubourg , Nicole Auza , Tim S. Axelrod , Deborah J. Bard , Jeff D. Barr , Aurelian Barrau , James G. Bartlett , Amanda E. Bauer , Brian J. Bauman , Sylvain Baumont , Andrew C. Becker , Jacek Becla , Cristina Beldica , Steve Bellavia , Federica B. Bianco , Rahul Biswas , Guillaume Blanc , Jonathan Blazek , Roger D. Blandford , Josh S. Bloom , Joanne Bogart , Tim W. Bond , Anders W. Borgland , Kirk Borne , James F. Bosch , Dominique Boutigny , Craig A. Brackett , Andrew Bradshaw , William Nielsen Brandt , Michael E. Brown , James S. Bullock , Patricia Burchat , David L. Burke , Gianpietro Cagnoli , Daniel Calabrese , Shawn Callahan , Alice L. Callen , Srinivasan Chandrasekharan , Glenaver Charles-Emerson , Steve Chesley , Elliott C. Cheu , Hsin-Fang Chiang , James Chiang , Carol Chirino , Derek Chow , David R. Ciardi , Charles F. Claver , Johann Cohen-Tanugi , Joseph J. Cockrum , Rebecca Coles , Andrew J. Connolly , Kem H. Cook , Asantha Cooray , Kevin R. Covey , Chris Cribbs , Wei Cui , Roc Cutri , Philip N. Daly , Scott F. Daniel , Felipe Daruich , Guillaume Daubard , Greg Daues , William Dawson , Francisco Delgado , Alfred Dellapenna , Robert de Peyster , Miguel de Val-Borro , Seth W. Digel , Peter Doherty , Richard Dubois , Gregory P. Dubois-Felsmann , Josef Durech , Frossie Economou , Michael Eracleous , Henry Ferguson , Enrique Figueroa , Merlin Fisher-Levine , Warren Focke , Michael D. Foss , James Frank , Michael D. Freemon , Emmanuel Gangler , Eric Gawiser , John C. Geary , Perry Gee , Marla Geha , Charles J. B. Gessner , Robert R. Gibson , D. Kirk Gilmore , Thomas Glanzman , William Glick , Tatiana Goldina , Daniel A. Goldstein , Iain Goodenow , Melissa L. Graham , William J. Gressler , Philippe Gris , Leanne P. Guy , Augustin Guyonnet , Gunther Haller , Ron Harris , Patrick A. Hascall , Justine Haupt , Fabio Hernandez , Sven Herrmann , Edward Hileman , Joshua Hoblitt , John A. Hodgson , Craig Hogan , Dajun Huang , Michael E. Huffer , Patrick Ingraham , Walter R. Innes , Suzanne H. Jacoby , Bhuvnesh Jain , Fabrice Jammes , James Jee , Tim Jenness , Garrett Jernigan , Darko Jevremović , Kenneth Johns , Anthony S. Johnson , Margaret W. G. Johnson , R. Lynne Jones , Claire Juramy-Gilles , Mario Jurić , Jason S. Kalirai , Nitya J. Kallivayalil , Bryce Kalmbach , Jeffrey P. Kantor , Pierre Karst , Mansi M. Kasliwal , Heather Kelly , Richard Kessler , Veronica Kinnison , David Kirkby , Lloyd Knox , Ivan V. Kotov , Victor L. Krabbendam , K. Simon Krughoff , Petr Kubánek , John Kuczewski , Shri Kulkarni , John Ku , Nadine R. Kurita , Craig S. Lage , Ron Lambert , Travis Lange , J. Brian Langton , Laurent Le Guillou , Deborah Levine , Ming Liang , Kian-Tat Lim , Chris J. Lintott , Kevin E. Long , Margaux Lopez , Paul J. Lotz , Robert H. Lupton , Nate B. Lust , Lauren A. MacArthur , Ashish Mahabal , Rachel Mandelbaum , Darren S. Marsh , Philip J. Marshall , Stuart Marshall , Morgan May , Robert McKercher , Michelle McQueen , Joshua Meyers , Myriam Migliore , Michelle Miller , David J. Mills , Connor Miraval , Joachim Moeyens , David G. Monet , Marc Moniez , Serge Monkewitz , Christopher Montgomery , Fritz Mueller , Gary P. Muller , Freddy Muñoz Arancibia , Douglas R. Neill , Scott P. Newbry , Jean-Yves Nief , Andrei Nomerotski , Martin Nordby , Paul O'Connor , John Oliver , Scot S. Olivier , Knut Olsen , William O'Mullane , Sandra Ortiz , Shawn Osier , Russell E. Owen , Reynald Pain , Paul E. Palecek , John K. Parejko , James B. Parsons , Nathan M. Pease , J. Matt Peterson , John R. Peterson , Donald L. Petravick , M. E. Libby Petrick , Cathy E. Petry , Francesco Pierfederici , Stephen Pietrowicz , Rob Pike , Philip A. Pinto , Raymond Plante , Stephen Plate , Paul A. Price , Michael Prouza , Veljko Radeka , Jayadev Rajagopal , Andrew P. Rasmussen , Nicolas Regnault , Kevin A. Reil , David J. Reiss , Michael A. Reuter , Stephen T. Ridgway , Vincent J. Riot , Steve Ritz , Sean Robinson , William Roby , Aaron Roodman , Wayne Rosing , Cecille Roucelle , Matthew R. Rumore , Stefano Russo , Abhijit Saha , Benoit Sassolas , Terry L. Schalk , Pim Schellart , Rafe H. Schindler , Samuel Schmidt , Donald P. Schneider , Michael D. Schneider , William Schoening , German Schumacher , Megan E. Schwamb , Jacques Sebag , Brian Selvy , Glenn H. Sembroski , Lynn G. Seppala , Andrew Serio , Eduardo Serrano , Richard A. Shaw , Ian Shipsey , Jonathan Sick , Nicole Silvestri , Colin T. Slater , J. Allyn Smith , R. Chris Smith , Shahram Sobhani , Christine Soldahl , Lisa Storrie-Lombardi , Edward Stover , Michael A. Strauss , Rachel A. Street , Christopher W. Stubbs , Ian S. Sullivan , Donald Sweeney , John D. Swinbank , Alexander Szalay , Peter Takacs , Stephen A. Tether , Jon J. Thaler , John Gregg Thayer , Sandrine Thomas , Vaikunth Thukral , Jeffrey Tice , David E. Trilling , Max Turri , Richard Van Berg , Daniel Vanden Berk , Kurt Vetter , Francoise Virieux , Tomislav Vucina , William Wahl , Lucianne Walkowicz , Brian Walsh , Christopher W. Walter , Daniel L. Wang , Shin-Yawn Wang , Michael Warner , Oliver Wiecha , Beth Willman , Scott E. Winters , David Wittman , Sidney C. Wolff , W. Michael Wood-Vasey , Xiuqin Wu , Bo Xin , Peter Yoachim , Hu Zhan
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