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the_p_ocessing_of_individual_decam_images [2025/08/13 16:35] ednalitchfield5 created |
the_p_ocessing_of_individual_decam_images [2025/09/08 19:39] (current) ednalitchfield5 created |
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| - | [[//www.youtube.com/embed/https://www.youtube.com/watch?v=JszioS6hW_A|external frame]] | ||
| - | (Image: [[https://image.shutterstock.com/image-photo/trimming-shrubs-electric-trimmer-man-260nw-1727671360.jpg|https://image.shutterstock.com/image-photo/trimming-shrubs-electric-trimmer-man-260nw-1727671360.jpg]])We current the Dark Energy Camera All Data Everywhere (DECADE) weak lensing dataset: a catalog of 107 million galaxies observed by the Dark Energy Camera (DECam) within the northern Galactic cap. This catalog was assembled from public DECam knowledge together with survey and normal observing programs. These information were consistently processed with the Dark Energy Survey Data Management pipeline as part of the DECADE campaign and function the basis of the DECam Local Volume Exploration survey (DELVE) Early Data Release three (EDR3). We apply the Metacalibration measurement algorithm to generate and calibrate galaxy shapes. We present a collection of detailed studies to characterize the catalog, measure any residual systematic biases, and confirm that the catalog is suitable for cosmology analyses. Despite the considerably inhomogeneous nature of the data set, because of it being an amalgamation of various observing programs, we find the resulting catalog has adequate quality to yield competitive cosmological constraints. | ||
| + | (Image: [[https://mdl.artvee.com/sftb/21932po.jpg|https://mdl.artvee.com/sftb/21932po.jpg]])We present the Dark Energy Camera All Data Everywhere (DECADE) weak lensing dataset: a catalog of 107 million galaxies observed by the Dark Energy Camera (DECam) in the northern Galactic cap. This catalog was assembled from public DECam knowledge including survey and commonplace observing packages. These information had been consistently processed with the Dark Energy Survey Data Management pipeline as part of the DECADE campaign and [[http://79.141.77.190:8081/clintfain75566/wood-ranger-power-shears-reviews2021/wiki/Shear+Care+101%253A+how+to+Keep+up+Your+Salon+Shears|Wood Ranger Power Shears official site]] serve as the basis of the DECam Local Volume Exploration survey (DELVE) Early Data Release three (EDR3). We apply the Metacalibration measurement algorithm to generate and calibrate galaxy shapes. We current a collection of detailed studies to characterize the catalog, measure any residual systematic biases, and confirm that the catalog is appropriate for cosmology analyses. Despite the significantly inhomogeneous nature of the info set, as a result of it being an amalgamation of various observing packages, we discover the ensuing catalog has sufficient quality to yield competitive cosmological constraints. | ||
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| + | Measurements of weak gravitational lensing - the deflection of light from distant sources by the intervening matter distribution between the supply and the observer - provide necessary constraints on the growth, evolution, and content of the Universe (Bartelmann & Schneider 2001; Schneider 2005). The cosmological lensing effect, which depends on the gravitational potential discipline, is seeded by the whole matter distribution of our Universe. Thus, weak lensing is instantly sensitive to all matter components, including those that do not emit/absorb light and [[https://www.commercesa.co.za/index.php?page=user&action=pub_profile&id=8820|Wood Ranger official]] would otherwise be unobservable. This makes lensing a powerful probe of the underlying construction of the Universe (see Bartelmann & Schneider 2001, for a assessment of weak gravitational lensing) and of any processes that influence this structure; including modified gravity (e.g., [[https://giteaismyownrepository.nosv.org/ramongracia13|efficient hedge cutting]] Schmidt 2008), primordial signatures (e.g., Anbajagane et al. 2024c; Goldstein et al. 2024), in addition to a wide variety of astrophysical impacts (e.g., Chisari et al. 2018; Schneider et al. | ||
| - | 2019; Aricò et al. 2021; Grandis et al. 2024; Bigwood et al. 2024; Anbajagane et al. Since the first detection of weak lensing greater than two a long time in the past (Bacon et al. 2000; Kaiser et al. 2000; Wittman et al. 2000), the cosmology group has invested vital effort in rising the statistical energy of, and lowering the systematic biases in, these measurements. At the center of these advances are more and more larger and better-quality datasets, which have persistently grown in sky protection, depth, and image high quality. The neighborhood has now developed from the early weak lensing surveys that have a couple of million source galaxies111Throughout this work, we follow widespread nomenclature utilized by the group in referring to galaxies used within the weak lensing measurement as "source galaxies"., such as the Canada-France-Hawaii Telescope Lensing Survey (CFHTLenS, Heymans et al. 2013) and the Deep Lens Survey (DLS, Jee et al. 2013), [[https://rentry.co/47892-these-machines-provide-robust-performance-and-precise-cuts|hedge trimming shears]] to current Stage-III222The "Stage-N" terminology was launched in Albrecht et al. | ||
| + | 2019; Aricò et al. 2021; Grandis et al. 2024; Bigwood et al. 2024; Anbajagane et al. Since the primary detection of weak lensing greater than two many years in the past (Bacon et al. 2000; Kaiser et al. 2000; Wittman et al. 2000), the cosmology community has invested important effort in rising the statistical energy of, and lowering the systematic biases in, these measurements. At the guts of those advances are more and more larger and better-quality datasets, which have consistently grown in sky protection, depth, and image quality. The group has now advanced from the early weak lensing surveys that have just a few million supply galaxies111Throughout this work, we comply with common nomenclature used by the neighborhood in referring to galaxies used in the weak lensing measurement as "source galaxies"., such because the Canada-France-Hawaii Telescope Lensing Survey (CFHTLenS, Heymans et al. 2013) and the Deep Lens Survey (DLS, Jee et al. 2013), to current Stage-III222The "Stage-N" terminology was introduced in Albrecht et al. | ||
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