학술논문
Overview of the DESI Legacy Imaging Surveys
Document Type
Working Paper
Author
Dey, Arjun; Schlegel, David J.; Lang, Dustin; Blum, Robert; Burleigh, Kaylan; Fan, Xiaohui; Findlay, Joseph R.; Finkbeiner, Doug; Herrera, David; Juneau, Stephanie; 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.; Zou, Christophe Yeche 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.; Buckley-Geer, Cesar Briceno Elizabeth J.; Butler, Karen; Calamida, Annalisa; Carlberg, Raymond G.; Carter, Paul; Casas, Ricard; Castander, Francisco J.; Choi, Yumi; Comparat, Johan; Cukanovaite, Elena; Delubac, Timothee; 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; Gansicke, Boris T.; Gaztanaga, Enrique; George, Koshy; Gerdes, David W.; Gontcho, Satya Gontcho A; Gorgoni, Claudio; Green, Gregory; Guy, Julien; Harmer, Diane; Hernandez, M.; Honscheid, Klaus; Lijuan; Huang; James, David; Jannuzi, Buell T.; Jiang, Linhua; Joyce, Richard; Karcher, Armin; Karkar, Sonia; Kehoe, Robert; Kneib, Jean-Paul; Kueter-Young, Andrea; Lan, Ting-Wen; Lauer, Tod; Guillou, Laurent Le; Van Suu, Auguste Le; Lee, Jae Hyeon; Lesser, Michael; Levasseur, Laurence Perreault; Li, Ting S.; Mann, Justin L.; Marshall, Bob; Martinez-Vazquez, C. E.; Martini, Paul; Bourboux, Helion du Mas des; McManus, Sean; Meier, Tobias Gabriel; Menard, Brice; Metcalfe, Nigel; Munoz-Gutierrez, 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; Sanchez, 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-Magana, 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
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Abstract
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 approximately 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 micorons) observed by the Wide-field Infrared Survey Explorer (WISE) 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.
Comment: 47 pages, 18 figures; accepted for publication in the Astronomical Journal
Comment: 47 pages, 18 figures; accepted for publication in the Astronomical Journal