========================================================================== IX/58 2SXPS Swift X-ray telescope point source catalogue (Evans+, 2020) The following files can be converted to FITS (extension .fit or fit.gz) 2sxps.dat 2sxpscle.dat ========================================================================== Query from: http://vizier.u-strasbg.fr/viz-bin/VizieR?-source=IX/58 ==========================================================================
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Beginning of ReadMe : IX/58 2SXPS Swift X-ray telescope point source catalogue (Evans+, 2020) ================================================================================ 2SXPS: An improved and expanded Swift X-ray telescope point source catalog. Evans P.A., Page K.L., Osborne J.P., Beardmore A.P., Willingale R., Burrows D.N., Kennea J.A., Perri M., Capalbi M., Tagliaferri G., Cenko S.B. <Astrophys. J., Suppl. Ser., 247, 54 (2020)> =2020yCat.9058....0E =2020ApJS..247...54E ================================================================================ ADC_Keywords: X-ray sources ; Surveys Mission_Name: Swift Keywords: catalogs - surveys - X-rays: observations - methods: data analysis Abstract: We present the 2SXPS (Swift-XRT Point Source) catalog, containing 206,335 point sources detected by the Swift X-ray Telescope (XRT) in the 0.3-10 keV energy range. This catalog represents a significant improvement over 1SXPS, with double the sky coverage (now 3,790deg^2^), and several significant improvements in source detection and classification. In particular, we present for the first time techniques to model the effect of stray light - significantly reducing the number of spurious sources detected. These techniques will be very important for future, large effective area X-ray mission such as the forthcoming Athena X-ray observatory. We also present a new model of the XRT point spread function, and a method for correctly localising and characterising piled up sources. We provide light curves - in four energy bands, two hardness ratios and two binning timescales -- for every source, and from these deduce that over 80,000 of the sources in 2SXPS are variable in at least one band or hardness ratio. The catalog data can be queried or downloaded via a bespoke web interface at https://www.swift.ac.uk/2SXPS, via HEASARC, or in Vizier (IX/58) Description: The 2SXPS catalogue is a point-source catalogue built from all Swift-XRT Photon Counting mode data of at least 50 s in duration gathered prior between 2005 Jan 01 and 2018 August 01. It contains positions, fluxes, spectral details, variability information and a flag indicating the reliability of the detection for 206,335 objects. Various values (e.g. the count rates) are given in 4 bands: Total = 0.3-10 keV Soft = 0.3-1 keV Medium = 1-2 keV Hard = 2-10 keV The source detection was performed in each of these bands independently, and the results combined to give this final catalogue.