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Durham University

Department of Physics

Staff profile

Publication details for Dr Richard Bielby

Dey, Arjun, Schlegel, David J., Lang, Dustin, Blum, Robert, Burleigh, Kaylan, Fan, Xiaohui, Findlay, Joseph R., Finkbeiner, Doug, Herrera, David, Juneau, Stéphanie, Landriau, Martin, Levi, Michael, McGreer, Ian, Meisner, Aaron, Myers, Adam D., Moustakas, John, Nugent, Peter, Patej, Anna, Schlafly, Edward F., Walker, Alistair R., Valdes, Francisco, Weaver, Benjamin A., Yèche, Christophe, Zou, Hu, Zhou, Xu, Abareshi, Behzad, Abbott, T. M. C., Abolfathi, Bela, Aguilera, C., Alam, Shadab, Allen, Lori, Alvarez, A., Annis, James, Ansarinejad, Behzad, Aubert, Marie, Beechert, Jacqueline, Bell, Eric F., BenZvi, Segev Y., Beutler, Florian, Bielby, Richard M., Bolton, Adam S., Briceño, César, Buckley-Geer, Elizabeth J., Butler, Karen, Calamida, Annalisa, Carlberg, Raymond G., Carter, Paul, Casas, Ricard, Castander, Francisco J., Choi, Yumi, Comparat, Johan, Cukanovaite, Elena, Delubac, Timothée, DeVries, Kaitlin, Dey, Sharmila, Dhungana, Govinda, Dickinson, Mark, Ding, Zhejie, Donaldson, John B., Duan, Yutong, Duckworth, Christopher J., Eftekharzadeh, Sarah, Eisenstein, Daniel J., Etourneau, Thomas, Fagrelius, Parker A., Farihi, Jay, Fitzpatrick, Mike, Font-Ribera, Andreu, Fulmer, Leah, Gänsicke, Boris T., Gaztanaga, Enrique, George, Koshy, Gerdes, David W., A Gontcho, Satya Gontcho, Gorgoni, Claudio, Green, Gregory, Guy, Julien, Harmer, Diane, Hernandez, M., Honscheid, Klaus, Huang, Lijuan (Wendy), James, David J., Jannuzi, Buell T., Jiang, Linhua, Joyce, Richard, Karcher, Armin, Karkar, Sonia, Kehoe, Robert, Kneib, Jean-Paul,, Kueter-Young, Andrea, Lan, Ting-Wen, Lauer, Tod R., Guillou, Laurent Le, Van Suu, Auguste Le, Lee, Jae Hyeon, Lesser, Michael, Levasseur, Laurence Perreault, Li, Ting S., Mann, Justin L., Marshall, Robert, Martínez-Vázquez, C. E., Martini, Paul, du Mas des Bourboux, Hélion, McManus, Sean, Meier, Tobias Gabriel, Ménard, Brice, Metcalfe, Nigel, Muñoz-Gutiérrez, Andrea, Najita, Joan, Napier, Kevin, Narayan, Gautham, Newman, Jeffrey A., Nie, Jundan, Nord, Brian, Norman, Dara J., Olsen, Knut A. G., Paat, Anthony, Palanque-Delabrouille, Nathalie, Peng, Xiyan, Poppett, Claire L., Poremba, Megan R., Prakash, Abhishek, Rabinowitz, David, Raichoor, Anand, Rezaie, Mehdi, Robertson, A. N., Roe, Natalie A., Ross, Ashley J., Ross, Nicholas P., Rudnick, Gregory, Safonova, Sasha, Saha, Abhijit, Sánchez, F. Javier, Savary, Elodie, Schweiker, Heidi, Scott, Adam, Seo, Hee-Jong, Shan, Huanyuan, Silva, David R., Slepian, Zachary, Soto, Christian, Sprayberry, David, Staten, Ryan, Stillman, Coley M., Stupak, Robert J., Summers, David L., Tie, Suk Sien, Tirado, H., Vargas-Magaña, Mariana, Vivas, A. Katherina, Wechsler, Risa H., Williams, Doug, Yang, Jinyi, Yang, Qian, Yapici, Tolga, Zaritsky, Dennis, Zenteno, A., Zhang, Kai, Zhang, Tianmeng, Zhou, Rongpu & Zhou, Zhimin (2019). Overview of the DESI Legacy Imaging Surveys. The Astronomical Journal 157(5): 168.

Author(s) from Durham


The DESI Legacy Imaging Surveys ( 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 deg2 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 μm) 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.