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The 4XMM-DR13 catalogue contains source detections drawn from 13243 XMM-Newton EPIC observations, covering an energy interval from 0.2 keV to 12 keV. These observations were made between 2000 February 3 and 2022 December 31 and all datasets were publicly available by 2022 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 4XMM (Webb et al., 2020).

This research has made use of data obtained from the 4XMM XMM-Newton serendipitous source catalogue compiled by the XMM-Newton Survey Science Centre consortium.

As well as the fits and csv formats of the catalogue distributed below, the following Web-based user interfaces will allow filtering and searching of the catalogue (and give access to all or selected associated data products):

The SSC Catalogue Home Page (this page), XSA, and HEASARC allow download of the catalogue file in (binary) FITS. Summary pages and products are already available in the IRAP catalogue server.

The cross-correlation products of potential counterparts at other wavelengths for 4XMM-DR13 are provided through the XCAT-DB and the IRAP catalogue server.

We also provide Multi-Order-Coverage maps (MOCs) for 4XMM-DR13. MOCs for individual observations in fits format can be downloaded via the catalogue server (identified through their OBSIDs). The MOC covering the whole of 4XMM-DR13 field is available here. Amongst other ways to use the MOCs, we recommend the python tool MOCpy. We also provide EPIC flux maps for each observation, where each point on the map provides the limiting flux for a source detected at 3 sigma in the 0.2-12.0 keV band (assuming a power law spectrum with a photon index of 1.42 and an nH of 1.7x1020 cm-2) here. Information on these maps can be found here. Rate maps are provided here. Alternatively, they can be accessed through the IRAP catalogue server, provided at the top of the page for each individual detection of the sources in the field of view.
The following table gives an overview of the statistics of the catalogue in comparison with the 4XMM-DR12 catalogue.

  4XMM-DR13 4XMM-DR12 Increment
Number of observations 13243 12712 531
Number of 'clean' observations (i.e., observation class < 3) 10895 10543 352
Observing interval 03-Feb-00 -- 31-Dec-22 03-Feb-00 -- 31-Dec-21 1 yr
Sky coverage, taking overlaps into account ( ≥  1ksec exposure) 1328 sq.deg 1283 sq.deg 45 sq.deg
Number of detections 983948 939270 44678
Number of 'clean' detections (i.e., summary flag < 3) 854095 821953 32142
Number of unique sources 656997 630347 26650
Number of 'cleanest' (summary flag = 0, not in high-background fields) extended detections 20971 20169 802
Number of detections with spectra 353821 337058 16763
Number of detections with timeseries 353538 336776 16762
Number of detections where probability of timeseries being constant is  <  1  × 10-5 8029 7697 332

The median flux in the total photon energy band (0.2 - 12 keV) of the catalogue detections is ~ 2.2 × 10-14 erg cm-2 s-1; in the soft energy band (0.2 - 2 keV) the median flux is ~ 5.2 × 10-15, and in the hard band (2 - 12 keV) it is ~ 1.2 × 10-14. About 23% of the sources have total fluxes below 1 × 10-14 erg cm-2 s-1.

About a tenth of the observations have features that may cause spurious detections (mainly the wings of bright sources and large extended emission), and it is strongly recommended to use a filter (both per source, based on the summary flag column, and per observation, based on the observation class column).


The 4XMM-DR13 catalogue, released on 2023 June 12th, is available in several formats:

Please read the Watchouts section before using the catalogues.

4XMM_DR13cat_v1.0.fits.gz FITS binary 914 MB MD5: ac4567602112cb37334c0a7cef4eda90 full binary catalogue; recommended for more in-depth studies (includes information of all detections)
4XMM_DR13cat_v1.0.csv.gz CSV 1.1 GB MD5: 14fcc3b86ae24feea343f663849aa023 full ascii catalogue
4XMM_slim_DR13cat_v1.0.fits.gz FITS binary 89 MB MD5: 1df0ebc787b5f59ac614f0054a9ab3b8 reduced binary catalogue, suited for studies of unique sources (individual detection information is not included)
4XMM_slim_DR13cat_v1.0.csv.gz CSV 113 MB MD5: a2cb8ce758b066e041d43c066b231e83 reduced ascii catalogue

For convenience, there are suitable SQL CREATE statements available for use with a relational DBMS in order to load the data in CSV format:

The CSV file has nulls represented by two successive commas, compatible with Postgres and (probably) other DBMS.

The slimline version of the catalogue contains one row per unique source (while the the main catalogue has one row per detection) and thus has 656997 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.

A separate file is also provided (table below) which contains key details about the observations used in the construction of the 4XMM-DR12 catalogue. See the list of observations for a description of the columns in the file.

4xmmdr13_obslist.fits FITS binary 1.5 MB MD5: 846a316acabaf65ba5b524c9cd6d303a Summary table of observations used in the catalogue


The User Guide for the 4XMM-DR13 catalogue contains details of the catalogue production process and content. Here are quick links to

Watchouts for 4XMM-DR13

1) Contrary to previous versions, 4XMM-DR13 contains correct estimates for the pileup for both point-like and extended sources.

Nomenclature and Citation

With the 4XMM catalogue, IAU name nomenclature includes the designator, 4XMM. The IAU name is provided in the catalogue. The correct, full nomenclature for a specific detection from the catalogues is the IAU name, followed by a colon and the detection identification number, that is:"4XMM Jhhmmss.sSddmmss:detid". For the stacked catalogue it is:"4XMMs Jhhmmss.sSddmmss:detid"


The production of the 4XMM-DR13 catalogue is a collaborative project involving the whole XMM-Newton SSC Consortium:

The SSC team are grateful to the XMM-Newton SOC for their support in the catalogue production activities.

This project has received funding from the European Union's Horizon 2020 research and innovation programme under grant agreement number 101004168, the XMM2ATHENA project.

The SSC acknowledges the use of the TOPCAT and STILTS software packages (written by Mark Taylor, University of Bristol) in the production and testing of the 4XMM-DR13 catalogue.