A new version of the XMM-Newton EPIC Serendipitous Source Catalogue, 4XMM-DR11, has been released on 18th August by the XMM-Newton Survey Science Centre (XMM-SSC) in collaboration with the SOC. This version includes an extra year of data with respect to 4XMM-DR10. 4XMM-DR11 includes 895,415 X-ray detections which relate to 602,543 unique X-ray sources from 12,210 observations that were public by the 31st December 2020. 4XMM-DR11 covers a total sky area, with at least 1 ks exposure, of 1,239 square degrees if overlaps are taken into account, where some regions of the sky have been pointed as many as 80 times. Around 13% of all the detections are classified as extended, and spectra and time series have been extracted for 36% of the detections. The median positional uncertainty of the catalogue detections is 1.57 arcseconds (with a standard deviation of 1.43). Median fluxes in the catalogue are ~5.2E-15 and ~1.2E-14 erg\/cm2\/s in the soft (0.2-2 keV) and hard (2-12 keV) X-ray band, respectively.<\/p>\n\n\n\n
With 4XMM-DR11, we release 4XMM-DR11s, the catalogue version created from overlapping observations. Stacking observations provides longer effective exposure times, resulting in better source parameters and higher sensitivity. 4XMM-DR11s is built from 1,475 groups with 8,292 observations. Most of the stacks are composed of 2 observations and the largest has 357. The catalogue contains 35,8809 sources, of which 275,440 have several contributing observations. It reaches a median flux of ~3.3E-15 and ~1.1E-14 erg\/cm2\/s in the soft (0.2-2 keV) and hard (2-12 keV) X-ray band, respectively. 8587 good quality sources are variable on the long term.<\/p>\n\n\n\n
The detection catalogue is described in the paper Webb et al. (2020)<\/a> and the stacked catalogue is further described in Traulsen et al. (2020)<\/a>. http:\/\/xmmssc.irap.omp.eu\/Catalogue\/4XMM-DR11\/4XMM_DR11.html<\/a>\u00a0 FITS files containing summary information about the observations used in the catalogue are also provided. FITS and CSV versions of the full 4XMM catalogue and a slimline version of the FITS file are also available for download at:<\/p>\n\n\n\n http:\/\/www.cosmos.esa.int\/web\/xmm-newton\/xsa<\/a> <\/p>\n\n\n\n The slimline version of 4XMM-DR11 has only one row per unique source (rather than per detection as in the main catalogue) and a reduced number of columns that essentially pertain to the unique source quantities.<\/p>\n\n\n\n Alongside the XSA user interface, 4XMM is also distributed through:<\/p>\n\n\n\n XCATDB<\/span>: http:\/\/xcatdb.unistra.fr\/4xmmdr11<\/a>\u00a0 A new version of the XMM-Newton EPIC Serendipitous Source Catalogue, 4XMM-DR11, has been released on 18th August by the XMM-Newton Survey Science Centre (XMM-SSC) in collaboration with the SOC. This version includes an extra year of data with respect to 4XMM-DR10. 4XMM-DR11 includes 895,415 X-ray detections which relate to 602,543 unique X-ray sources from 12,210…
Details of the catalogue, the catalogue files and full 4XMM documentation are available on the XMM-SSC webpages at:<\/p>\n\n\n\n
and<\/span>
https:\/\/xmmssc.aip.de\/cms\/catalogues\/catalogue-4xmm-dr11s\/<\/a>\u00a0<\/p>\n\n\n\n
HEASARC<\/span>: https:\/\/heasarc.gsfc.nasa.gov\/w3browse\/all\/xmmssc.html\u00a0<\/a>
IRAP<\/span>: http:\/\/xmm-catalog.irap.omp.eu\/<\/a>\u00a0<\/p>\n","protected":false},"excerpt":{"rendered":"
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