VizieR Online Data Catalog: XMM-Newton Serendipitous Source Catalogue 4XMM-DR9 (Webb+, 2020)

The 4XMM-DR9 catalogue contains source detections drawn from 11204 XMM-Newton EPIC observations, covering an energy interval from 0.2keV to 12keV. These observations were made between 2000 February 3 and 2019 February 26 and all datasets were publicly available by 2019 December 18, but not all public observations are included in this catalogue

The following table gives an overview of the statistics of the catalogue in comparison with the 3XMM-DR8 catalogue.

--------------------------------------------------------------------------- 4XMM-DR9 3XMM-DR8 Increment --------------------------------------------------------------------------- Number of observations 11204 10242 962 Number of 'clean' observations 9441 6496 2945 (i.e., observation class < 3) Observing interval 01-Feb-00 03-Feb-00 26-Feb-19 30-Nov-17 1.25 yr Sky coverage, taking overlaps into account ( >= 1ksec exposure) 1152 sq.deg 1089 sq.deg 63 sq.deg Number of detections 810795 775153 35642 Number of 'clean' detections (i.e., summary flag < 3) 713966 633733 80233 Number of unique sources 550124 531454 18670 Number of 'cleanest' (summary flag = 0, 17295 12256 5039 not in high-background fields) extended detections Number of detections with spectra 288521 173277 115244 Number of detections with timeseries 288282 173208 115074 Number of detections where probability 6696 5934 762 of timeseries being constant is <1x10-5 ---------------------------------------------------------------------------

The production and content of the 4XMM catalogue is described in the the 4XMM-DR9 User Guide at http://xmmssc.irap.omp.eu/Catalogue/4XMM-DR9/4XMM-DR9_CatalogueUser_Guide.html

The slimline version of the catalogue (file "xmm4r9s.dat") contains one row per unique source (while the the main catalogue has one row per detection) and thus has 550124 rows. There are 45 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.

(3 data files).