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Overview of the DESI Legacy Imaging Surveys

2019; Institute of Physics; Volume: 157; Issue: 5 Linguagem: Inglês

10.3847/1538-3881/ab089d

1538-3881

Arjun Dey, David J. Schlegel, Dustin Lang, Robert Blum, Kaylan Burleigh, Xiaohui Fan, Joseph Findlay, Doug Finkbeiner, David Herrera, S. Juneau, Martin Landriau, M. E. Levi, Ian D. McGreer, Aaron Meisner, Adam D. Myers, John Moustakas, P. Nugent, Anna Patej, Edward F. Schlafly, A. R. Walker, F. Valdés, Benjamin A. Weaver, Christophe Yèche, Hu Zou, X. K. Zhou, Behzad Abareshi, T. M. C. Abbott, Bela Abolfathi, C. Aguilera, Shadab Alam, Lori Allen, A. Alvarez, J. Annis, Behzad Ansarinejad, M Aubert, Jacqueline Beechert, Eric F. Bell, S. BenZvi, Florian Beutler, R. M. Bielby, A. Bolton, César Briceño, E. Buckley‐Geer, Karen A. Butler, A. Calamida, R. G. Carlberg, Paul Carter, R. Casas, F. J. Castander, Yumi Choi, Johan Comparat, Elena Cukanovaite, Timothée Delubac, Kaitlin Devries, Sharmila Dey, G. Dhungana, Mark Dickinson, Zhejie Ding, John B. Donaldson, Yutong Duan, Christopher Duckworth, Sarah Eftekharzadeh, Daniel J. Eisenstein, Thomas Etourneau, Parker Fagrelius, Jay Farihi, Mike Fitzpatrick, Andreu Font-Ribera, Leah Fulmer, B. T. Gänsicke, E. Gaztañaga, Koshy George, D. W. Gerdes, Satya Gontcho A Gontcho, Claudio Gorgoni, Gregory Green, J. Guy, D. Harmer, M. Hernandez, K. Honscheid, Lijuan Huang, D. J. James, Buell T. Jannuzi, Linhua Jiang, R. R. Joyce, A. Karcher, S. Karkar, R. Kehoe, Jean‐Paul Kneib, Andrea Kueter-Young, Ting-Wen Lan, Tod R. Lauer, L. Le Guillou, A. Le Van Suu, Jaehyeon Lee, M. Lesser, Laurence Perreault-Levasseur, Ting S. Li, Justin L. Mann, Robert Marshall, C. E. Martínez-Vázquez, Paul Martini, Hélion du Mas des Bourboux, Sean McManus, Tobias G. Meier, B. Menard, N. Metcalfe, A. Muñoz-Gutiérrez, Joan Najita, Kevin J. Napier, Gautham Narayan, Jeffrey A. Newman, Jundan Nie, B. Nord, Dara Norman, Knut Olsen, Anthony Paat, N. Palanque‐Delabrouille, Xiyan Peng, Claire Poppett, Megan R. Poremba, Abhishek Prakash, D. Rabinowitz, Anand Raichoor, Mehdi Rezaie, Ashley Robertson, Natalie A. Roe, Ashley J. Ross, Nicholas P. Ross, Gregory Rudnick, Sasha Gaines, Abhijit Saha, F. Javier Sánchez, Élodie Savary, Heidi Schweiker, Adam Scott, Hee‐Jong Seo, Huanyuan Shan, David R. Silva, Zachary Slepian, Christian Soto, David Sprayberry, Ryan Staten, Coley M. Stillman, Robert J. Stupak, D. L. Summers, Suk Sien Tie, H. Tirado, M. Vargas-Magaña, A. K. Vivas, Risa H. Wechsler, Doug Williams, Jinyi Yang, Qian Yang, T. Yapici, Dennis Zaritsky, A. Zenteno, Kai Zhang, Tianmeng Zhang, Rongpu Zhou, Zhimin Zhou,

Adaptive optics and wavefront sensing

Abstract The DESI Legacy Imaging Surveys ( http://legacysurvey.org/ ) are a combination of three public projects (the Dark Energy Camera Legacy Survey, the Beijing–Arizona Sky Survey, and the Mayall z -band Legacy Survey) that will jointly image ≈14,000 deg 2 of the extragalactic sky visible from the northern hemisphere in three optical bands ( g , r , and z ) using telescopes at the Kitt Peak National Observatory and the Cerro Tololo Inter-American Observatory. The combined survey footprint is split into two contiguous areas by the Galactic plane. The optical imaging is conducted using a unique strategy of dynamically adjusting the exposure times and pointing selection during observing that results in a survey of nearly uniform depth. In addition to calibrated images, the project is delivering a catalog, constructed by using a probabilistic inference-based approach to estimate source shapes and brightnesses. The catalog includes photometry from the grz optical bands and from four mid-infrared bands (at 3.4, 4.6, 12, and 22 μ m) observed by the Wide-field Infrared Survey Explorer satellite during its full operational lifetime. The project plans two public data releases each year. All the software used to generate the catalogs is also released with the data. This paper provides an overview of the Legacy Surveys project.