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The Processing Of Individual DECam Images
Berry Von Doussa が 2週間前 にこのページを編集
We current the Dark Energy Camera All Data Everywhere (DECADE) weak lensing dataset: Wood Ranger Power Shears website 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 information together with survey and normal observing programs. These knowledge had been consistently processed with the Dark Energy Survey Data Management pipeline as part of the DECADE marketing campaign and serve as the premise of the DECam Local Volume Exploration survey (DELVE) Early Data Release 3 (EDR3). We apply the Metacalibration measurement algorithm to generate and calibrate galaxy shapes. We present a set of detailed research to characterize the catalog, measure any residual systematic biases, high capacity pruning tool and confirm that the catalog is appropriate for cosmology analyses. Despite the significantly inhomogeneous nature of the information set, as a result of it being an amalgamation of various observing packages, we discover the ensuing catalog has enough quality to yield competitive cosmological constraints.
Measurements of weak gravitational lensing - the deflection of mild from distant sources by the intervening matter distribution between the source and the observer - provide important constraints on the expansion, evolution, and content material of the Universe (Bartelmann & Schneider 2001
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