IX/55        XMM-Newton Serendipitous Source Catalogue 3XMM-DR8 (XMM-SSC, 2018)
The following files can be converted to FITS (extension .fit or fit.gz)
	xmm3r8s.dat summary.dat
Query from: http://vizier.u-strasbg.fr/viz-bin/VizieR?-source=IX/55

drwxr-xr-x 58 cats archive 4096 Jan 25 2021 [Up] drwxr-xr-x 3 cats archive 4096 May 26 16:19 [TAR file] -rw-r--r-- 1 cats archive 470 Feb 4 2019 .message -r--r--r-- 1 cats archive 14230 Jul 16 2020 ReadMe -rw-r--r-- 1 cats archive 49668 Jan 30 2019 3XMM_DR8_cat_v1.0.fih -rw-r--r-- 1 cats archive 670360593 May 14 2018 3XMM_DR8_cat_v1.0.fits.gz [Uncompressed] -r--r--r-- 1 cats archive 7630 Jan 30 2019 3XMM_DR8_cat_v1.0.fits.gzi -rw-r--r-- 1 cats archive 3143 Feb 4 2019 +footg5.gif -rw-r--r-- 1 cats archive 39812 Feb 4 2019 +footg8.gif -r--r--r-- 1 cats archive 383813 Jan 30 2019 summary.dat.gz [txt] [txt.gz] [fits] [fits.gz] [html] -rw-r--r-- 1 cats archive 670360593 May 14 2018 xmm3r8.fit.gz [Uncompressed] -r--r--r-- 1 cats archive 78199852 Jan 30 2019 xmm3r8s.dat.gz [txt] [txt.gz] [fits] [fits.gz] [html]
Beginning of ReadMe : IX/55 XMM-Newton Serendipitous Source Catalogue 3XMM-DR8 (XMM-SSC, 2018) ================================================================================ The XMM-Newton serendipitous survey. VII. The third XMM-Newton serendipitous source catalogue. Rosen S.R., Webb N.A., Watson, M.G., Ballet J., Barret D., Braito V., Carrera F.J., Ceballos M.T., Coriat M., Della Ceca R., Denkinson G., Esquej P., Farrell S.A., Freyberg M., Grise F., Guillout P., Heil L., Law-Green D., Lamer G., Lin D., Martino R., Michel L., Motch C., Nebot Gomez-Moran A., Page C.G., Page K., Page M., Pakull M.W., Pye J., Read A., Rodriguez P., Sakano M., Saxton R., Schwope A., Scott A.E., Sturm R., Traulsen I., Yershov V., Zolotukhin I. <XMM-SSC, Leicester, UK; Astron. Astrophys. 590, A1 (2016)> =2019yCat.9055....0R =2016A&A...590A...1R ================================================================================ ADC_Keywords: X-ray sources ; Surveys Mission_Name: XMM Keywords: catalogs - astronomical data bases - surveys - X-rays: general Description: The 3XMM-DR8 catalogue contains source detections drawn from 10242 XMM-Newton EPIC observations, covering an energy interval from 0.2 keV to 12 keV. These observations were made between 2000 February 3 and 2017 November 30 and all datasets were publicly available by 2017 December 31, but not all public observations are included in this catalogue (see below for more information). Should you use the catalogue for your research and publish the results, please use the acknowledgement below and cite the paper describing 3XMM (Rosen, Webb, Watson et al., 2016A&A...590A...1R). This research has made use of data obtained from the 3XMM XMM-Newton serendipitous source catalogue compiled by the 10 institutes of the XMM-Newton Survey Science Centre selected by ESA. The following table gives an overview of the statistics of the catalogue in comparison with the 3XMM-DR7 catalogue. --------------------------------------------------------------------------- 3XMM-DR8 3XMM-DR7 Increment --------------------------------------------------------------------------- Number of observations 10242 9710 532 Number of 'clean' observations 6496 6164 332 (i.e., observation class < 3) Observing interval 03-Feb-00 03-Feb-00 30-Nov-17 15-Dec-16 1 yr Sky coverage, taking overlaps into account ( >=1ksec exposure) 1089sq.deg 1032sq.deg 57sq.deg Number of detections 775153 727790 47363 Number of 'clean' detections (i.e., summary flag < 3) 633733 596268 37465 Number of unique sources 531454 499266 32188 Number of 'cleanest' (summary flag = 0, 12256 11220 1036 not in high-background fields) extended detections Number of detections with spectra 173277 162082 11195 Number of detections with timeseries 173208 162045 11163 Number of detections where probability 5934 5631 303 of timeseries being constant is <1x10^-5^ --------------------------------------------------------------------------- The production and content of the 3XMM catalogue is described in the the 3XMM-DR8 User Guide at http://xmmssc.irap.omp.eu/Catalogue/3XMM-DR8/3XMM-DR8_Catalogue_User_Guide.html The slimline version of the catalogue (file "xmm3r8s.dat") contains one row per unique source (while the the main catalogue has one row per detection) and thus has 531454 rows. There are 44 columns, essentially those containing information about the unique sources. The catalogue also contains a column with links to the IRAP catalogue server summary pages. In the case of sources with multiple detections, the summary page of the best detection is selected (i.e., the detection with the largest exposure time, summed over all cameras), and the summary page gives cross-links to the other detections.

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