| Title: |
UNIONS: The Ultraviolet Near-infrared Optical Northern Survey |
| Authors: |
Gwyn, Stephen; Mcconnachie, Alan, W; Cuillandre, Jean-Charles; Chambers, Kenneth, C; Magnier, Eugene, A; de Boer, Thomas; Hudson, Michael, J; Oguri, Masamune; Furusawa, Hisanori; Hildebrandt, Hendrik; Carlberg, Raymond; Ellison, Sara, L; Furusawa, Junko; Gavazzi, Raphaël; Ibata, Rodrigo; Mellier, Yannick; Osato, Ken; Aussel, H.; Baumont, Lucie; Bayer, Manuel; Boulade, Olivier; Côté, Patrick; Chemaly, David; Daley, Cail; Duc, Pierre-Alain; Durret, Florence; Ellien, A.; Fabbro, Sébastien; Ferreira, Leonardo; Fitriana, Itsna, K; Le Floc’h, Emeric; Fudamoto, Yoshinobu; Gao, Hua; Goh, L, W K; Goto, Tomotsugu; Guerrini, Sacha; Guinot, Axel; Hénault-Brunet, Vincent; Hammer, Francois; Harikane, Yuichi; Hayashi, Kohei; Heesters, Nick; Ichikawa, Kohei; Kilbinger, Martin; Kuzma, P, B; Li, Qinxun; Liaudat, Tobías, I; Lin, Chien-Cheng; Müller, Oliver; Martin, Nicolas, F; Matsuoka, Yoshiki; Medina, Gustavo, E; Miyatake, Hironao; Miyazaki, Satoshi; Mpetha, Charlie, T; Nagao, Tohru; Navarro, Julio, F; Niwano, Masafumi; Ogami, Itsuki; Okabe, Nobuhiro; Onoue, Masafusa; Paek, Gregory, S H; Parker, Laura, C; Patton, David, R; Peters, Fabian, Hervas; Prunet, Simon; Sánchez-Janssen, Rubén; Schultheis, M.; Sestito, Federico; Smith, Simon, E T; Starck, J.-L.; Starkenburg, Else; Stone, Connor; Storfer, Christopher; Suzuki, Yoshihisa; Erben, T.; Taibi, Salvatore; Thomas, G, F; Toba, Yoshiki; Uchiyama, Hisakazu; Valls-Gabaud, David; Venn, Kim, A; van Waerbeke, Ludovic; Wainscoat, Richard, J; Wilkinson, Scott; Wittje, Anna; Yoshida, Taketo; Zhang, Tianfang; Zhong, Yuxing |
| Contributors: |
NRC Herzberg Astronomy and Astrophysics; Conseil National de Recherches Canada (CNRC); Astrophysique Interprétation Modélisation (AIM (UMR_7158 / UMR_E_9005 / UM_112)); Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité); Institute for Astronomy Honolulu; University of Hawai‘i Mānoa (UHM); Department of Physics and Astronomy Waterloo; University of Waterloo Waterloo; Research Center for the Early Universe Tokyo (RESCEU); Graduate School of Science The University of Tokyo (UTokyo); The University of Tokyo (UTokyo)-The University of Tokyo (UTokyo); Chiba University; Kavli Institute for the Physics and Mathematics of the Universe The University of Tokyo (UTIAS; The University of Tokyo Institutes for Advanced Study (UTokyo; Ruhr University Bochum = Ruhr-Universität Bochum Bochum (RUB); Department of Astronomy & Astrophysics, University of Toronto, 50 St. George Street, Toronto, ON, M5S 3H4, Canada; Department of Physics and Astronomy, University of Victoria; Laboratoire d'Astrophysique de Marseille (LAM); Aix Marseille Université (AMU)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales Toulouse (CNES)-Centre National de la Recherche Scientifique (CNRS); Observatoire astronomique de Strasbourg (ObAS); Université de Strasbourg (UNISTRA)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS); Institut d'Astrophysique de Paris (IAP); Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS); Astrophysique; Laboratoire de physique de l'ENS - ENS Paris (LPENS); Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité)-Département de Physique de l'ENS-PSL; École normale supérieure - Paris (ENS-PSL); Université Paris Sciences et Lettres (PSL)-Université Paris Sciences et Lettres (PSL)-École normale supérieure - Paris (ENS-PSL); Université Paris Sciences et Lettres (PSL)-Université Paris Sciences et Lettres (PSL)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité)-Département de Physique de l'ENS-PSL; Université Paris Sciences et Lettres (PSL)-Université Paris Sciences et Lettres (PSL); Astrophysique Interprétation Modélisation (AIM (UMR7158 / UMR_E_9005 / UM_112)); Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS); Kapteyn Astronomical Institute Groningen; University of Groningen Groningen; Commissariat à l'énergie atomique et aux énergies alternatives - Laboratoire d'Electronique et de Technologie de l'Information (CEA-LETI); Direction de Recherche Technologique (CEA) (DRT (CEA)); Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA); Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS); Universidade Federal de Minas Gerais = Federal University of Minas Gerais (UFMG); Waseda Research Institute for Science and Engineering; Waseda University Tokyo; National Astronomical Observatory of Japan (NAOJ); Center for Frontier Science; Joseph Louis LAGRANGE (LAGRANGE); Université Nice Sophia Antipolis (1965 - 2019) (UNS)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de la Côte d'Azur; Université Côte d'Azur (UniCA)-Université Côte d'Azur (UniCA)-Centre National de la Recherche Scientifique (CNRS); National Aeronautics and Space Administration (NASA); National Science Foundation (NSF); PRIN 2022 project EMC2—Euclid Mission Cluster Cosmology: unlock the full cosmological utility of the Euclid photometric cluster catalog (code No. J53D23001620006).; VIDI grant “Pushing Galactic Archaeology to its limits” (with project number VI. Vidi.193.093); Spinoza award by NWO (SPI 78-411).; CNES; JSPS KAKENHI; JSPS Core-to-Core Program (grant No.: JPJSCCA20210003); NSERC; TITAN ERA Chair project (contract No. 101086741); Swiss National Science Foundation, subvention No. PZ00P2_202104; Harding Distinguished Postgraduate Scholarship; VIDI grant “Pushing Galactic Archaeology to its limits”; Natural Sciences and Engineering Research Council of Canada; Pan-STARRS1 Survey; The Hyper Suprime-Cam (HSC) |
| Source: |
ISSN: 0004-6256. |
| Publisher Information: |
CCSD; American Astronomical Society |
| Publication Year: |
2025 |
| Subject Terms: |
Sky surveys; Weak gravitational lensing; Stellar streams; Galactic archaeology; [SDU]Sciences of the Universe [physics] |
| Time: |
2178; 1464; 1797; 2166 |
| Description: |
International audience ; The Ultraviolet Near-Infrared Optical Northern Survey (UNIONS) is a "collaboration of collaborations" that is using the Canada-France-Hawai'i Telescope, the Pan-STARRS telescopes, and the Subaru Observatory to obtain ugriz images of a core survey region of 6250 deg 2 of the northern sky. The 10σ point source depth of the data, as measured within a 2″ diameter aperture, are [u, g, r, i, z] = [23.7, 24.5, 24.2, 23.8, 23.3] in AB magnitudes. UNIONS is addressing some of the most fundamental questions in astronomy, including the properties of dark matter, the growth of structure in the Universe from the very smallest galaxies to large-scale structure, and the assembly of the Milky Way. It is set to become a major ground-based legacy survey for the northern hemisphere for the next decade, and it provides an essential northern complement to the static-sky science of the Vera C. Rubin Observatory's Legacy Survey of Space and Time. UNIONS supports the core science mission of the Euclid space mission by providing the data necessary in the northern hemisphere for the calibration of the wavelength dependence of the Euclid point-spread function and derivation of photometric redshifts in the North Galactic Cap. This region contains the highest quality sky for Euclid, with low backgrounds from the zodiacal light, stellar density, extinction, and emission from Galactic cirrus. Here, we describe the UNIONS survey components, science goals, data products, and the current status of the overall program. |
| Document Type: |
article in journal/newspaper |
| Language: |
English |
| DOI: |
10.3847/1538-3881/ae03ab |
| Availability: |
https://insu.hal.science/insu-05371538; https://insu.hal.science/insu-05371538v1/document; https://insu.hal.science/insu-05371538v1/file/Gwyn_2025_AJ_170_324.pdf; https://doi.org/10.3847/1538-3881/ae03ab |
| Rights: |
https://creativecommons.org/licenses/by/4.0/ ; info:eu-repo/semantics/OpenAccess |
| Accession Number: |
edsbas.93BD0972 |
| Database: |
BASE |