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- W2945018809 abstract "We present a catalog of photometric redshifts and stellar masses for galaxies from imaging surveys serving the Dark Energy Spectroscopic Instrument project. The imaging footprints cover an area of over 14,000 deg2. This catalog contains about 0.17 billion morphologically classified galaxies with r < 23 mag. It covers the redshift range of z < 1 and the mass range of . A total of five photometric bands are used, including three optical filters (g, r, and z) and two infrared filters (Wide-field Infrared Survey Explorer W1 and W2). We use k-nearest neighbors and local linear regression algorithms to estimate photometric redshifts. Based on a spectroscopic sample of about 2.2 million galaxies, we achieve a redshift bias of = 2.4 × 10−4, accuracy of = 0.017, and outlier rate of about 5.1%. The stellar mass and other physical parameters are derived by stellar population synthesis model fitting based on our photometric redshifts. The differences in derived using spectroscopic and photometric redshifts present a 1σ dispersion of 0.09 dex." @default.
- W2945018809 created "2019-05-29" @default.
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- W2945018809 creator A5091632981 @default.
- W2945018809 date "2019-05-21" @default.
- W2945018809 modified "2023-10-14" @default.
- W2945018809 title "Photometric Redshifts and Stellar Masses for Galaxies from the DESI Legacy Imaging Surveys" @default.
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- W2945018809 doi "https://doi.org/10.3847/1538-4365/ab1847" @default.
- W2945018809 hasPublicationYear "2019" @default.
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