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Paper: Cross-Matching Large Photometric Catalogs for Parameterization of Single and Binary Stars
Volume: 442, Astronomical Data Analysis Software and Systems XX (ADASSXX)
Page: 583
Authors: Malkov, O.; Karpov, S.
Abstract: We discuss the methods of reliable cross-matching of large photometric catalogs at various wavelengths (SDSS, GALEX, 2MASS, USNO-B1, etc.) for the purpose of collecting and using multicolor (from UV to IR) photometry of cross-matched objects. We pay special attention to the performance issues and describe several approaches for the speed-up of the match, involving construction of various spatial indices, both planar and spherical. We discuss the means of dealing with ambiguous (multi-candidate) matches using a-priori information. Color-index diagrams, constructed with the obtained photometry, are powerful tools for parameterization of stars. Particularly, detection of a composite flux in photometry can serve as an indication of a photometrically unresolved binarity and can contribute to the parameterization of the components of binary systems. Interstellar extinction values for cross-matched stars can also be calculated from the multicolor photometry.
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