/ftp/cats/IX/62



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IX/62         Catalog of CSC2.0-SDSS DR15 crossmatched sources     (Rots+, 2021)
The following files can be converted to FITS (extension .fit or fit.gz)
	catalog.dat
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Query from: http://vizier.u-strasbg.fr/viz-bin/VizieR?-source=IX/62
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drwxr-xr-x 58 cats archive 4096 Jan 25 2021 [Up] drwxr-xr-x 3 cats archive 278 Sep 7 22:56 [TAR file] -rw-r--r-- 1 cats archive 459 Jan 25 2021 .message -r--r--r-- 1 cats archive 8104 Jan 25 2021 ReadMe -rw-r--r-- 1 cats archive 1673 Jan 25 2021 +footg5.gif -rw-r--r-- 1 cats archive 14409 Jan 25 2021 +footg8.gif -r--r--r-- 1 cats archive 3583946 Jan 22 2021 catalog.dat.gz [txt] [txt.gz] [fits] [fits.gz] [html]
Beginning of ReadMe : IX/62 Catalog of CSC2.0-SDSS DR15 crossmatched sources (Rots+, 2021) ================================================================================ The catalog of Chandra Source Catalog 2.0 (CSC2.0) sources with Sloan Digital Sky Survey (SDSS) Data Release 15 and 16 counterparts. Rots A., Kim D.-W., CSC team <Chandra X-ray observatory (2021)> =2021yCat.9062....0R ================================================================================ ADC_Keywords: X-ray sources ; Surveys ; Optical ; Cross identifications Keywords: catalogs ; X-rays: general Description: We present a catalog of Chandra Source Catalog 2.0 sources cross-matched with SDSS DR15/16 counterparts. The crossmatch is performed with a Bayesian method developed by Budavari & Szalay (2008ApJ...679..301B) as implemented and extended by A. Rots (2020, https://cxc.cfa.harvard.edu/cda/files/XmatchQuickSummary.pdf) that takes into account local source density as well as both error ellipses and raw-size ellipses of the sources (for more details, see https://cxc.cfa.harvard.edu/cda/files/XmatchQuickSummary.pdf). CSC2.0 sources are extracted from the CSC2.0 "Master Source" table (https://cxc.harvard.edu/csc/columns/master_alpha.html), while SDSS DR15 are from the "Star" or "Galaxy" views. For each crossmatched source pair the match probability, match type and match grade are provided. In addition, ambiguous matches are explicitly called out and provided in separate published tables. The lists of ambiguous matches can be found in the following files: https://cxc.cfa.harvard.edu/cda/files/CSC2-SDSSDR15SG_AmbiguousXmatch.txt https://cxc.cfa.harvard.edu/cda/files/SDSSDR15SG-CSC2_AmbiguousXmatch.txt and a simple readme file is located at: https://cxc.cfa.harvard.edu/cda/files/AmbiguousXmatch.readme

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