Open Access
Overview of the DESI Legacy Imaging Surveys
David J. Schlegel,Jacqueline Beechert,Kaylan J. Burleigh,Arjun Dey,Joseph R. Findlay,David Herrera,Stéphanie Juneau,Martin Landriau,Dustin Lang,Aaron M. Meisner,John Moustakas,Adam D. Myers,Edward F. Schlafly,F. Valdes,Benjamin A. Weaver,Jinyi Yang,Christophe Yèche +16 more
- Vol. 233
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TLDR
The DESI Legacy Imaging Surveys (http://legacysurvey.org/) project is 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.Abstract:
Author(s): Huang, L; Dey, A; Schlegel, DJ; Lang, D; Blum, R; Burleigh, K; Fan, X; Findlay, JR; Finkbeiner, D; Herrera, D; Juneau, S; Landriau, M; Levi, M; McGreer, I; Meisner, A; Myers, AD; Moustakas, J; Nugent, P; Patej, A; Schlafly, EF; Walker, AR; Valdes, F; Weaver, BA; Yeche, C; Zou, H; Zhou, X; Abareshi, B; Abbott, TMC; Abolfathi, B; Aguilera, C; Alam, S; Allen, L; Alvarez, A; Annis, J; Ansarinejad, B; Aubert, M; Beechert, J; Bell, EF; Benzvi, SY; Beutler, F; Bielby, RM; Bolton, AS; Briceno, C; Buckley-Geer, EJ; Butler, K; Calamida, A; Carlberg, RG; Carter, P; Casas, R; Castander, FJ; Choi, Y; Comparat, J; Cukanovaite, E; Delubac, T; Devries, K; Dey, S; Dhungana, G; Dickinson, M; Ding, Z; Donaldson, JB; Duan, Y; Duckworth, CJ; Eftekharzadeh, S; Eisenstein, DJ; Etourneau, T; Fagrelius, PA; Farihi, J; Fitzpatrick, M; Font-Ribera, A; Fulmer, L; Gansicke, BT; Gaztanaga, E; George, K; Gerdes, DW; A Gontcho, SG; Gorgoni, C; Green, G; Guy, J; Harmer, D; Hernandez, M; Honscheid, K; Huang, LW; James, DJ; Jannuzi, BT; Jiang, L | Abstract: © 2019. The American Astronomical Society. All rights reserved.. 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 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.read more
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Journal ArticleDOI
LoTSS jellyfish galaxies: II. Ram pressure stripping in groups versus clusters
TL;DR: In this article, the authors used the LoFAR Two-metre Sky Survey (LoTSS) to search for jellyfish galaxies (i.e., galaxies with ram pressure stripped tails extending beyond the optical disk) in ∼500 SDSS groups.
Journal ArticleDOI
Preliminary Target Selection for the DESI Emission Line Galaxy (ELG) Sample
Anand Raichoor,Daniel J. Eisenstein,Tanveer Karim,Jeffrey A. Newman,John Moustakas,David Brooks,Kyle S. Dawson,Arjun Dey,Yutong Duan,Sarah Eftekharzadeh,Enrique Gaztanaga,Robert Kehoe,Martin Landriau,Dustin Lang,Jae H. Lee,Michael E. Levi,Aaron M. Meisner,Adam D. Myers,Nathalie Palanque-Delabrouille,Claire Poppett,Francisco Prada,Ashley J. Ross,David J. Schlegel,Michael Schubnell,Ryan Staten,Gregory Tarlé,Rita Tojeiro,Christophe Yèche,Rongpu Zhou +28 more
TL;DR: Raichoor et al. as discussed by the authors presented a preliminary target selection for an emission line galaxy (ELG) sample, which will comprise about half of all DESI tracers.
Journal ArticleDOI
Time-resolved WISE/NEOWISE Coadds
TL;DR: In this paper, the first 3.4 micron and 4.6 micron observations from the WISE and NEOWISE missions were used to create a full-sky set of time-resolved coadds.
Journal ArticleDOI
Systematically Measuring Ultradiffuse Galaxies in H i: Results from the Pilot Survey
Ananthan Karunakaran,Kristine Spekkens,Kristine Spekkens,Dennis Zaritsky,Richard L. Donnerstein,Jennifer Kadowaki,Arjun Dey +6 more
TL;DR: In this article, neutral hydrogen (HI) observations using the Robert C. Byrd Green Bank Telescope (GBT) of 70 optically-detected UDG candidates in the Coma region from the Systematically Measuring Ultra-Diffuse Galaxies survey (SMUDGes) were presented.
Journal ArticleDOI
Galaxy Clusters from the DESI Legacy Imaging Surveys. I. Cluster Detection
Hu Zou,Jinghua Gao,Xin Xu,Xu Zhou,Jun Ma,Zhimin Zhou,Tianmeng Zhang,Jundan Nie,Jiali Wang,Suijian Xue +9 more
TL;DR: Based on the photometric redshift catalog of Zou H. et al. as discussed by the authors, they apply a fast clustering algorithm to identify 540,432 galaxy clusters at $z\lesssim1$ in the DESI legacy imaging surveys, which cover a sky area of about 20,000 deg$^2$.
References
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TL;DR: The Sloan Digital Sky Survey (SDSS) as discussed by the authors provides the data to support detailed investigations of the distribution of luminous and non-luminous matter in the universe: a photometrically and astrometrically calibrated digital imaging survey of π sr above about Galactic latitude 30° in five broad optical bands to a depth of g' ~ 23 mag.
Journal ArticleDOI
The wide-field infrared survey explorer (wise): mission description and initial on-orbit performance
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TL;DR: The Wide-field Infrared Survey Explorer (WISE) is mapping the whole sky following its launch on 14 December 2009 and completed its first full coverage of the sky on July 17 as discussed by the authors.