Search

Start Over Capability Type Simple Cone Search
17631. XMM-Newton point-source catalogue of the SMC
ID:
ivo://CDS.VizieR/J/A+A/558/A3
Title:
XMM-Newton point-source catalogue of the SMC
Short Name:
J/A+A/558/A3
Date:
21 Oct 2021
Publisher:
CDS
Description:
The XMM-Newton survey of the Small Magellanic Cloud (SMC) yields a complete coverage of the bar and eastern wing in the 0.2-12.0keV band. This catalogue comprises 3053 unique X-ray point sources and sources with moderate extent that have been reduced from 5236 individual detections found in observations between April 2000 and April 2010. Sources have a median position uncertainty of 1.3" (1{sigma}) and limiting fluxes down to ~1*10^-14^erg/s/cm2 in the 0.2-4.5keV band, corresponding to 5*10^33^erg/s for sources in the SMC. Sources have been classified using hardness ratios, X-ray variability, and their multi-wavelength properties. In addition to the main-field (5.58deg^2^) available outer fields have been included in the catalogue, yielding a total field area of 6.32deg^2^. X-ray sources with high extent (>40", e.g. supernova remnants and galaxy cluster) have been presented by Haberl et al. (2012, Cat. J/A+A/545/A128)
17632. 13+38 XMM-Newton/ROSAT 1.4GHz radio catalog
ID:
ivo://CDS.VizieR/J/MNRAS/352/131
Title:
13+38 XMM-Newton/ROSAT 1.4GHz radio catalog
Short Name:
J/MNRAS/352/131
Date:
21 Oct 2021
Publisher:
CDS
Description:
In order to determine the relationship between the faint X-ray and faint radio source populations, and hence to help understand the X-ray and radio emission mechanisms in those faint source populations, we have made a deep 1.4-GHz Very Large Array radio survey of the 13h+38{deg} XMMNewton/ROSAT X-ray Survey Area. From a combined data set of 10-h, B-configuration data and 14-h, A-configuration data, maps with 3.35-arcsec resolution and a noise limit of 7.5Jy were constructed. A complete sample of 449 sources was detected within a 30-arcmin diameter region above a 4 detection limit of 30Jy, at the map centre, making this one of the deepest radio surveys at this frequency. The differential source count shows a significant upturn at submilliJansky flux densities, similar to that seen in other deep surveys at 1.4GHz (e.g. the Phoenix survey, Cat. <J/MNRAS/296/839>), but larger than that seen in the Hubble Deep Field (HDF) which may have been selected to be underdense. This upturn is well modelled by the emergence of a population of medium-redshift star-forming galaxies which dominate at faint flux densities. The brighter source counts are well modelled by active galactic nuclei.
17633. XMM-Newton Serendipitous Source Catalog from Stacked Observations: Obs. Data
ID:
ivo://nasa.heasarc/xmmstackob
Title:
XMM-Newton Serendipitous Source Catalog from Stacked Observations: Obs. Data
Short Name:
XMMSTACKOB
Date:
28 Feb 2025
Publisher:
NASA/GSFC HEASARC
Description:
The stacked catalog 4XMM-DR14s (&lt;a href="/W3Browse/xmm-newton/xmmstack.html"&gt;XMMSTACK&lt;/a&gt;) has been compiled from 1,751 groups, comprising 10,336 overlapping XMM-Newton observations. They were selected from the public observations taken between 2000 February 1 and 2023 November 16 which overlap by at least one arcminute in radius. It contains 427,524 unique sources, 329,972 of them multiply observed, with positions and source parameters like fluxes in the XMM-Newton standard energy bands, hardness ratios, quality estimate, and information on inter-observation variability. The parameters are directly derived from the simultaneous fit, and, wherever applicable, additionally calculated for each contributing observation. Exposures that do not qualify for source detection, for example because of a high background level, are used for subsequent PSF photometry: source fluxes and flux-related parameters are derived for them at the source position and extent found during source detection. 4XMM-DR14s lists 1,807,316 individual flux measurements of the 427,524 unique sources. Stacked source detection aims at exploring the multiply observed sky regions and exploit their survey potential, in particular to study the long-term behavior of X-ray emitting sources. It thus makes use of the long(er) effective exposure time per sky area and offers the opportunity to investigate flux variability directly through the source detection process. The main catalog properties are summarized in the table below, the data processing and the stacked source detection are described in the processing summary. To ensure detection quality, background levels are assessed, and event-based astrometric corrections are applied before running source detection. After source detections, problematic detections and detection parameters are flagged by an automated algorithm. All detections are screened visually, and obviously spurious sources are flagged manually. This table contains the source parameters from the individual observations in the stacked catalog, &lt;a href="/W3Browse/xmm-newton/xmmstack.html"&gt;4XMM-DR14s&lt;/a&gt;. The parameters are derived from the simultaneous source-detection fit to all stacked observations at the common source position for each observation that covers a source, amounting to 1,807,316 measurements. The mean source parameters from stacked source detection are provided in the associated main table &lt;a href="/W3Browse/xmm-newton/xmmstack.html"&gt;4XMM-DR14s&lt;/a&gt;, referred to as XMMSTACK. The authors referred to the EPIC instruments with the following designations: PN, M1 (MOS1), and M2 (MOS2). The energy bands used in the 4XMM processing were the same as for the 3XMM catalog. The following are the basic energy bands: &lt;pre&gt; 1: 0.2-0.5 keV 2: 0.5-1.0 keV 3: 1.0-2.0 keV 4: 2.0-4.5 keV 5: 4.5-12.0 keV &lt;/pre&gt; All-EPIC values cover the energy range 0.2-12.0 keV. The full catalog documentation can be found at &lt;a href="https://xmmssc.aip.de/"&gt;https://xmmssc.aip.de/&lt;/a&gt;. The following table gives an overview of the statistics of this catalog in comparison with the previous stacked catalogs, 4XMM-DR14s through 3XMM-DR7s: &lt;pre&gt; 4XMM-DR14s 4XMM-DR13s 4XMM-DR12s 4XMM-DR11s 4XMM-DR10s 4XMM-DR9s 3XMM-DR7s Number of stacks 1,751 1,688 1,620 1,475 1,396 1,329 434 Number of observations 10,336 9,796 9,355 8,292 7,803 6,604 789 Time span first to last observation Feb 01, 2000 Feb 01, 2000 Feb 01, 2000 Feb 03, 2000 Feb 03, 2000 Feb 03, 2000 Feb 20, 2000 -- Nov 16,2023 -- Nov 29, 2022 -- Dec 04, 2021 -- Dec 17, 2020 -- Dec 14, 2019 -- Nov 13, 2018 -- Apr 02, 2016 Approximate sky coverage (sq. deg.) 685 650 625 560 540 485 150 Approximate multiply observed sky area(sq. deg) 440 420 400 350 335 300 100 Total number of sources 427,524 401,596 386,043 358,809 335,812 288,191 71,951 Sources with several contributing observations 329,972 310,478 298,626 275,440 256,213 218,283 57,665 Multiply observed sources with flag 0 or 1 276,058 262,842 252,445 233,542 216,999 191,497 55,450 Multiply observed with a total detection 266,129 251,555 241,880 224,178 208,921 181,132 49,935 likelihood of at least six Multiply observed with a total detection 226,219 213,812 205,394 189,556 176,680 153,487 42,077 likelihood of at least ten Total measurements 1,807,316 1,683,264 1,592,263 1,421,966 1,322,299 1,033,264 216,393 Maximum exposures per source 173 170 155 140 140 103 69 Maximum observations per source 77 77 70 65 65 40 23 Maximum on-time per source 2.8 Ms 2.8 Ms 2.8 Ms 2.8 Ms 2.8 Ms 1.9 Ms 1.3 Ms &lt;/pre&gt; This database table was last updated by the HEASARC in July 2024. It contains the 4XMM-DR14s observations catalog, released by ESA on 2024-07-09 and obtained from the XMM-Newton Survey Science Center Consortium at &lt;a href="https://xmmssc.aip.de/cms/catalogues/4xmm-dr14s/"&gt;https://xmmssc.aip.de/cms/catalogues/4xmm-dr14s/&lt;/a&gt;. It is &lt;a href="https://xmmssc.aip.de/data/xmmstack_v3.2_4xmmdr14s.fits.gz"&gt;also available as a gzipped FITS file&lt;/a&gt;. This is a service provided by NASA HEASARC .
17634. XMM-Newton Serendipitous Source Catalog from Stacked Observations (4XMM-DR14s)
ID:
ivo://nasa.heasarc/xmmstack
Title:
XMM-Newton Serendipitous Source Catalog from Stacked Observations (4XMM-DR14s)
Short Name:
XMMSTACK
Date:
28 Feb 2025
Publisher:
NASA/GSFC HEASARC
Description:
The stacked catalog 4XMM-DR14s has been compiled from 1,751 groups, comprising 10,336 overlapping XMM-Newton observations. They were selected from the public observations taken between 2000 February 1 and 2023 November 16 which overlap by at least one arcminute in radius. It contains 427,524 unique sources, 329,972 of them multiply observed, with positions and source parameters like fluxes in the XMM-Newton standard energy bands, hardness ratios, quality estimate, and information on inter-observation variability. The parameters are directly derived from the simultaneous fit, and, wherever applicable, additionally calculated for each contributing observation. Exposures that do not qualify for source detection, for example because of a high background level, are used for subsequent PSF photometry: source fluxes and flux-related parameters are derived for them at the source position and extent found during source detection. 4XMM-DR14s lists 1,807,316 individual flux measurements (visits) of the 427,524 unique sources. Stacked source detection aims at exploring the multiply observed sky regions and exploit their survey potential, in particular to study the long-term behavior of X-ray emitting sources. It thus makes use of the long(er) effective exposure time per sky area and offers the opportunity to investigate flux variability directly through the source detection process. The main catalog properties are summarized in the table below, the data processing and the stacked source detection are described in the processing summary. To ensure detection quality, background levels are assessed, and event-based astrometric corrections are applied before running source detection. After source detections, problematic detections and detection parameters are flagged by an automated algorithm. All detections are screened visually, and obviously spurious sources are flagged manually. This table contains the parameters of the 427,524 unique sources (provided in this table) derived simultaneously from all of the observations (provided in the associated table of observations referred to as &lt;a href="/W3Browse/xmm-newton/xmmstackob.html"&gt;XMMSTACKOB&lt;/a&gt;) at the fitted position. The authors referred to the EPIC instruments with the following designations: PN, M1 (MOS1), and M2 (MOS2). The energy bands used in the 4XMM processing were the same as for the 3XMM catalog. The following are the basic energy bands: &lt;pre&gt; 1: 0.2-0.5 keV 2: 0.5-1.0 keV 3: 1.0-2.0 keV 4: 2.0-4.5 keV 5: 4.5-12.0 keV &lt;/pre&gt; All-EPIC values cover the energy range 0.2-12.0 keV. The full catalog documentation can be found at &lt;a href="https://xmmssc.aip.de/"&gt;https://xmmssc.aip.de/&lt;/a&gt;. The following table gives an overview of the statistics of this catalog in comparison with the previous stacked catalogs, 4XMM-DR14s through 3XMM-DR7s: &lt;pre&gt; 4XMM-DR14s 4XMM-DR13s 4XMM-DR12s 4XMM-DR11s 4XMM-DR10s 4XMM-DR9s 3XMM-DR7s Number of stacks 1,751 1,688 1,620 1,475 1,396 1,329 434 Number of observations 10,336 9,796 9,355 8,292 7,803 6,604 789 Time span first to last observation Feb 01, 2000 Feb 01, 2000 Feb 01, 2000 Feb 03, 2000 Feb 03, 2000 Feb 03, 2000 Feb 20, 2000 -- Nov 16,2023 -- Nov 29, 2022 -- Dec 04, 2021 -- Dec 17, 2020 -- Dec 14, 2019 -- Nov 13, 2018 -- Apr 02, 2016 Approximate sky coverage (sq. deg.) 685 650 625 560 540 485 150 Approximate multiply observed sky area(sq. deg) 440 420 400 350 335 300 100 Total number of sources 427,524 401,596 386,043 358,809 335,812 288,191 71,951 Sources with several contributing observations 329,972 310,478 298,626 275,440 256,213 218,283 57,665 Multiply observed sources with flag 0 or 1 276,058 262,842 252,445 233,542 216,999 191,497 55,450 Multiply observed with a total detection 266,129 251,555 241,880 224,178 208,921 181,132 49,935 likelihood of at least six Multiply observed with a total detection 226,219 213,812 205,394 189,556 176,680 153,487 42,077 likelihood of at least ten Total measurements 1,807,316 1,683,264 1,592,263 1,421,966 1,322,299 1,033,264 216,393 Maximum exposures per source 173 170 155 140 140 103 69 Maximum observations per source 77 77 70 65 65 40 23 Maximum on-time per source 2.8 Ms 2.8 Ms 2.8 Ms 2.8 Ms 2.8 Ms 1.9 Ms 1.3 Ms &lt;/pre&gt; This database table was last updated by the HEASARC in July 2024. It contains the 4XMM-DR14s source catalog, released by ESA on 2024-07-09 and obtained from the XMM-Newton Survey Science Center Consortium at &lt;a href="https://xmmssc.aip.de/cms/catalogues/4xmm-dr14s/"&gt;https://xmmssc.aip.de/cms/catalogues/4xmm-dr14s/&lt;/a&gt;. It is &lt;a href="https://xmmssc.aip.de/data/xmmstack_v3.2_4xmmdr14s.fits.gz"&gt;also available as a gzipped FITS file&lt;/a&gt;. This is a service provided by NASA HEASARC .
17635. XMM-Newton Serendipitous Source Catalogue (2XMM)
ID:
ivo://wfau.roe.ac.uk/xmm_dsa
Title:
XMM-Newton Serendipitous Source Catalogue (2XMM)
Short Name:
2XMM
Date:
23 Jan 2024 09:36:54
Publisher:
WFAU, Institute for Astronomy, University of Edinburgh
Description:
XMM is the second comprehensive catalogue of serendipitous X-ray sources from the European Space Agency's (ESA) XMM-Newton observatory. The 2XMM catalogue is the largest X-ray source catalogue ever produced, containing almost twice as many discrete sources as either the ROSAT survey or pointed catalogues. 2XMM complements deeper Chandra and XMM-Newton small area surveys, probing a much larger sky area.
17636. XMM-Newton Serendipitous Source Catalogue (1XMM)
ID:
ivo://CDS.VizieR/IX/37
Title:
XMM-Newton Serendipitous Source Catalogue (1XMM)
Short Name:
IX/37
Date:
21 Oct 2021
Publisher:
CDS
Description:
1XMM is the first comprehensive catalogue of serendipitous X-ray sources from the European Space Agency's (ESA) XMM-Newton observatory launched in December 1999, and has been constructed by the XMM-Newton Survey Science Centre (SSC) on behalf of ESA. Most (>80%) of the entries have not previously been reported as X-ray sources. The catalogue contains source detections drawn from 585 XMM-Newton EPIC observations made between 2000 March 1 and 2002 May 5; all datasets were publicly available by 2003 January 31 but not all public observations are included in this catalogue. Net exposure times in these observations range from less than 1000 up to about 100000 seconds. The total area of the catalogue fields is about 90deg^2^, but taking account of the substantial overlaps between observations, the net sky area covered independently is about 50deg^2^. The observations sample, albeit sparsely, most of the sky, with the exception of a 'hole' centered in the Cygnus region, caused by spacecraft observing constraints. The catalogue source detection and parametrization technique is optimized for point-like sources, and has been performed across several photon-energy bands (see "EPIC energy bands" below) and using data from each of the three EPIC cameras PN, MOS-1, MOS-2; the prefixes PN_ M1_ M2_ are generally used to designate the columns of the catalogue related to the detections by the corresponding camera. The catalogue in its FITS version has ~ 400 columns; these include source-detection parameters (likelihood, position coordinates, counts, count rate, flux, hardness ratio, background estimates, errors etc), the results of cross-correlation with a large number of archival catalogues (SIMBAD, NED, USNO, GSC, APM, ROSAT etc), quality 'flags' resulting from visual screening, and 'meta-data' relating to the observation. For practical considerations the ascii version of the catalogue is made of 3 tables representing the sources, the observations and processing details, and the results of the cross-correlations; the names used as column names in the ASCII version are also reported within parentheses in the "Byte-by-Byte" descriptions below. Details about the construction of the catalogue can be found from the XMM-Newton Survey Science Centre (http://xmmssc-www.star.le.ac.uk/)
17637. XMM-Newton Serendipitous Source Catalogue 3XMM-DR5
ID:
ivo://CDS.VizieR/IX/46
Title:
XMM-Newton Serendipitous Source Catalogue 3XMM-DR5
Short Name:
IX/46
Date:
21 Oct 2021
Publisher:
CDS
Description:
Thanks to the large collecting area (3x~1500cm^2^ at 1.5keV) and wide field of view (30' across in full field mode) of the X-ray cameras on board the European Space Agency X-ray observatory XMM-Newton, each individual pointing can result in the detection of hundreds of X-ray sources, most of which are newly discovered. Recently, many improvements in the XMM-Newton data reduction algorithms have been made. These include enhanced source characterisation and reduced spurious source detections, refined astrometric precision of sources, greater net sensitivity for source detection and the extraction of spectra and time series for fainter sources, with better signal-to-noise. Further, almost 50% more observations are in the public domain compared to 2XMMi-DR3, allowing the XMM-Newton Survey Science Centre (XMM-SSC) to produce a much larger and better quality X-ray source catalogue. The XMM-SSC has developed a pipeline to reduce the XMM-Newton data automatically and using improved calibration a new catalogue version has been made from XMM-Newton data made public by 2013 Dec. 31 (13 years of data). Manual screening ensures the highest data quality. This catalogue is known as 3XMM. In the latest release, 3XMM-DR5, there are 565962 X-ray detections comprising 396910 unique X-ray sources. For the 133000 brightest sources, spectra and lightcurves are provided. For all detections, the positions on the sky, a measure of the detection quality, and an evaluation of variability is provided, along with the fluxes and count rates in 7 X-ray energy bands, the total 0.2-12keV band counts, and four hardness ratios. To identify the detections, a cross correlation with 228 catalogues is also provided for each X-ray detection. 3XMM-DR5 is the largest X-ray source catalogue ever produced. Thanks to the large array of data products, it is an excellent resource in which to find new and extreme objects.
17638. XMM-Newton Serendipitous Source Catalogue 3XMM-DR8
ID:
ivo://CDS.VizieR/IX/55
Title:
XMM-Newton Serendipitous Source Catalogue 3XMM-DR8
Short Name:
IX/55
Date:
22 Feb 2022
Publisher:
CDS
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.
17639. XMM-Newton Serendipitous Source Catalogue 3XMM-DR7
ID:
ivo://CDS.VizieR/IX/54
Title:
XMM-Newton Serendipitous Source Catalogue 3XMM-DR7
Short Name:
IX/54
Date:
22 Feb 2022
Publisher:
CDS
Description:
The 3XMM-DR7 catalogue contains source detections drawn from 9710 XMM-Newton EPIC observations, covering an energy interval from 0.2keV to 12keV. These observations were made between 2000 February 3 and 2016 December 15 and all datasets were publicly available by 2016 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-DR6 catalogue. --------------------------------------------------------------------------- 3XMM-DR7 3XMM-DR6 Increment --------------------------------------------------------------------------- Number of observations 9710 9159 551 Number of 'clean' observations 6164 5826 338 (i.e., observation class < 3) Observing interval 03-Feb-00 03-Feb-00 15-Dec-16 04-Jun-15 1.5 yr Sky coverage, taking overlaps into account ( >= 1ksec exposure) 1032sq.deg 982sq.deg 50sq.deg Number of detections 727790 678680 49110 Number of 'clean' detections 596268 552951 43317 (i.e., summary flag < 3) Number of unique sources 499266 468440 30826 Number of 'cleanest' (summary flag = 0, 11220 10290 930 not in high-background fields) extended detections Number of detections with spectra 162082 149998 12084 Number of detections with timeseries 162045 149968 12077 Number of detections where probability 5631 5238 393 of timeseries being constant is <1x10^-5^ --------------------------------------------------------------------------- The production and content of the 3XMM catalogue is described in the the 3XMM-DR7 User Guide at http://xmmssc.irap.omp.eu/Catalogue/3XMM-DR7/3XMM-DR7_Catalogue_User_Guide.html The slimline version of the catalogue ( file "xmm3r7s.dat") contains one row per unique source (while the the main catalogue has one row per detection) and thus has 499266 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.
17640. XMM-Newton Serendipitous Source Catalogue 3XMM-DR4
ID:
ivo://CDS.VizieR/IX/44
Title:
XMM-Newton Serendipitous Source Catalogue 3XMM-DR4
Short Name:
IX/44
Date:
21 Oct 2021
Publisher:
CDS
Description:
The 3XMM-DR4 catalogue is the third generation catalog of serendipitous X-ray sources from the European Space Agency's (ESA) XMM-Newton observatory, and has been created by the XMM-Newton Survey Science Centre (SSC) on behalf of ESA. The catalog has 2474 more observations and about 178,000 (50%) more detections than the preceding 2XMMi-DR3 catalog, which was made public in April 2010. The history of the versions can be summarized as: ---------------------------------------------------- Name DR# Designation Year Cat. #Sources ---------------------------------------------------- 2XMMp 0 2XMMp-DR0 2006 2XMM 1 2XMM-DR1 2007 IX/39 191870 2XMMi 2 2XMMi-DR2 2008 IX/40 221012 2XMMi-DR3 3 2XMMi-DR3 2010 IX/41 262902 3XMM-DR4 4 3XMM 2013 IX/44 372728 ---------------------------------------------------- The production and content of the 3XMM catalogue is described in the the 3XMM-DR4 User Guide at http://xmmssc-www.star.le.ac.uk/Catalogue/3XMM-DR4/UserGuide_xmmcat.html The "slim" version of the catalogue (file "xmm3r4s.dat") contains one row per unique source, while the the main catalogue has one row per detection. This slim version includes 44 columns, essentially those containing information about the unique sources, while the full catalogue (file "xmm3r4.fit") describes all detections with 318 columns. The slim version also contains a column with links to the LEDAS 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 "summary.dat" contains the key details about the observations used in the construction of the 3XMM-DR4 catalogue.

Limit your search

more »

more »

more »

more »

more »

more »