IX/45               The Chandra Source Catalog, Release 1.1    (Evans+ 2012)
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Beginning of ReadMe : IX/45 The Chandra Source Catalog, Release 1.1 (Evans+ 2012) ================================================================================ The Chandra Source Catalog, Release 1.1 Evans I.N., Primini F.A., Glotfelty C.S., Anderson C.S., Bonaventura N.R., Chen J.C., Davis J.E., Doe S.M., Evans J.D., Fabbiano G., Galle E.C., Gibbs D.G., Grier J.D., Hain R.M., Hall D.M., Harbo P.N., He X., Houck J.C., Karovska M., Kashyap V.L., Lauer J., McCollough M.L., McDowell J.C., Miller J.B., Mitschang A.W., Morgan D.L., Mossman A.E., Nichols J.S., Nowak M.A., Plummer D.A., Refsdal B.L., Rots A.H., Siemiginowska A., Sundheim B.A., Tibbetts M.S., Van Stone D.W., Winkelman S.L., Zografou P. <Astrophys. J. Suppl. Ser. 189, 37 (2010)> =2010ApJS..189...37E =2014yCat.9045....0E ================================================================================ ADC_Keywords: X-ray sources ; Surveys ; Mission_Name: Chandra Keywords: catalogs; X-rays: general Abstract: The Chandra Source Catalog (CSC) is a general purpose virtual X-ray astrophysics facility that provides access to a carefully selected set of generally useful quantities for individual X-ray sources, and is designed to satisfy the needs of a broad-based group of scientists, including those who may be less familiar with astronomical data analysis in the X-ray regime. The first release of the CSC includes information about 94,676 distinct X-ray sources detected in a subset of public Advanced CCD Imaging Spectrometer imaging observations from roughly the first eight years of the Chandra mission. This release of the catalog includes point and compact sources with observed spatial extents < 30''. The catalog (1) provides access to the best estimates of the X-ray source properties for detected sources, with good scientific fidelity, and directly supports scientific analysis using the individual source data; (2) facilitates analysis of a wide range of statistical properties for classes of X-ray sources; and (3) provides efficient access to calibrated observational data and ancillary data products for individual X-ray sources, so that users can perform detailed further analysis using existing tools. The catalog includes real X-ray sources detected with flux estimates that are at least 3 times their estimated 1-sigma uncertainties in at least one energy band, while maintaining the number of spurious sources at a level of < 1 false source per field for a 100ks observation. For each detected source, the CSC provides commonly tabulated quantities, including source position, extent, multi-band fluxes, hardness ratios, and variability statistics, derived from the observations in which the source is detected. In addition to these traditional catalog elements, for each X-ray source the CSC includes an extensive set of file-based data products that can be manipulated interactively, including source images, event lists, light curves, and spectra from each observation in which a source is detected. Description: This version of the catalog is release 1.1. It includes the information contained in release 1.0.1, plus point and compact source data extracted from HRC imaging observations, and catch-up ACIS observations released publicly prior to the end of 2009. Request for Acknowledgment of Use of the Chandra Source Catalog: Users are kindly requested to acknowledge in the acknowledgment section of any resulting publications their use of the Chandra Source Catalog. The following language is suggested: "This research has made use of data obtained from the Chandra Source Catalog, provided by the Chandra X-ray Center (CXC) as part of the Chandra Data Archive"

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