- ID:
- ivo://nasa.heasarc/xmmssc
- Title:
- XMM-Newton Serendipitous Source Catalog (4XMM-DR14 Version)
- Short Name:
- XMM/SSC
- Date:
- 14 Feb 2025
- Publisher:
- NASA/GSFC HEASARC
- Description:
- The XMMSSC table contains the Fourth XMM-Newton Serendipitous Source Catalog, Fourteenth Data Release, or 4XMM-DR14. 4XMM-DR14 is the fourth-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. It is an incremental version of the the 4XMM catalog and contains 621 more observations and 51,884 more detections than the preceding 4XMM-DR13 catalog, which was made public in July 2023. In addition, the team provides spectra and lightcurves for more than 18,775 more detections than in 4XMM-DR13. The catalog contains source detections drawn from a total of 13,864 XMM-Newton EPIC observations made between 2000 February 1 and 2023 December 31; all datasets included were publicly available by 2023 December 31 but not all public observations are included in this catalog. For net exposure time >= 1ksec, the net area of the catalog fields taking account of the substantial overlaps between observations is ~1,383 deg<sup>2</sup>. 4XMM-DR13 contains 1,035,832 X-ray detections above the processing likelihood threshold of 6. These X-ray detections relate to 692,109 unique X-ray sources. A significant fraction of sources (135,324, 20%) have more than one detection in the catalog (up to 90 repeat observations in the most extreme case). The catalog distinguishes between extended emission and point-like detections. Parameters of detections of extended sources are only reliable up to the maximum extent measure of 80 arcseconds. There are 96,553 detections of extended emission, of which 22,147 are 'clean' (in the sense that they were not flagged). Due to intrinsic features of the instrumentation as well as some shortcomings of the source detection process, some detections are considered to be spurious or their parameters are considered to be unreliable. It is recommended to use a detection flag and an observation flag as filters to obtain what can be considered a 'clean' sample. There are 897,091 out of 1,035,832 detections that are considered to be clean (i.e., summary flag < 3). For 372,313 detections, EPIC time series and 372,603 detections, EPIC spectra were automatically extracted during processing, and a chi<sup>2</sup>-variability test was applied to the time series. 8,380 detections in the catalog are considered variable, within the timespan of the specific observation, at a probability of 10<sup>-5</sup> or less based on the null-hypothesis that the source is constant. Of these, 6,307 have a summary flag <3. The median flux (in the total photon-energy band 0.2 - 12 keV) of the catalog detections is ~ 2.2 x 10<sup>-14</sup> erg/cm<sup>2</sup>/s; in the soft energy band (0.2 - 2 keV) the median flux is ~ 5.2 x 10<sup>-15</sup>, and in the hard band (2 - 12 keV) it is ~1.2 x 10<sup>-14</sup>. About 23% have fluxes below 1 x 10<sup>-14</sup> erg/cm<sup>2</sup>/s. The flux values from the three EPIC cameras are, overall, in agreement to ~10% for most energy bands. The median positional accuracy of the catalog point source detections is generally < 1.57 arcseconds (with a standard deviation of 1.43 arcseconds). With 4XMM-DR14, the team also released 4XMM-DR14s, available from HEASARC as <a href="/W3Browse/xmm-newton/xmmstack.html">XMMSTACK</a>, a new version of the stacked catalog built from 10,336 4XMM-DR14 overlapping observations. 4XMM-DR14s contains 1,751 stacks (or groups). Most of the stacks are composed of 2 observations and the largest has 372. The catalog contains 427,524 sources, of which 329,972 have several contributing observations. Stacking observations allows yet fainter sources to be detected in sky regions observed more than once, increasing the number of detections and uncovering long-term variability on repeatedly observed objects. 4XMM-DR14s reaches a depth of ~2.5 x 10<sup>-15</sup> and ~6.8 x 10<sup>-15</sup> erg/cm<sup>2</sup>/s in the soft (0.2-2keV) and hard (2-12 keV) X-ray band, respectively. The energy bands used in the 4XMM-DR14 processing were the same as for the 3XMM catalog. The following are the basic energy bands: <pre> 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 </pre> while these are the broad energy bands: <pre> 6 = 0.2 - 2.0 keV soft band, no images made 7 = 2.0 - 12.0 keV hard band, no images made 8 = 0.2 - 12.0 keV total band 9 = 0.5 - 4.5 keV XID band </pre> This database table was last updated by the HEASARC in July 2024. It contains the 4XMM-DR14 catalog, released by ESA on 2024-07-09 and obtained from the XMM-Newton Survey Science Center Consortium (<a href="http://xmmssc.irap.omp.eu/Catalogue/4XMM-DR14/4XMM_DR14.html">http://xmmssc.irap.omp.eu/Catalogue/4XMM-DR14/4XMM_DR14.html</a>). It is also available as a gzipped FITS file at <a href="https://heasarc.gsfc.nasa.gov/FTP/xmm/data/catalogues/4XMM_DR13cat_v1.0.fits.gz">https://heasarc.gsfc.nasa.gov/FTP/xmm/data/catalogues/4XMM_DR13cat_v1.0.fits.gz</a>. <p> The previous versions of the Serendipitous Source Catalog, 3XMM-DR5, 3XMM-DR6, 3XMM-DR7, 3XMM-DR8, 4XMM-DR9, 4XMM-DR10, 4XMM-DR11, 4XMM-DR12, and 4XMM-DR13 are also available in the same directory for comparison purposes as the files 3XMM_DR5cat_v1.0.fits.gz, 3XMM_DR6cat_v1.0.fits.gz, 3XMM_DR7cat_v1.0.fits.gz, 3XMM_DR8_cat_v1.0.fits.gz, 4XMM_DR9_cat_v1.0.fits.gz, 4XMM_DR10cat_v1.0.fits.gz, 4XMM_DR11cat_v1.0.fits.gz, and 4XMM_DR12cat_v1.0.fits.gz, 4XMM_DR13cat_v1.0.fits.gz, respectively. This is a service provided by NASA HEASARC .
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Search Results
- ID:
- ivo://CDS.VizieR/J/A+A/476/1191
- Title:
- XMM-Newton serendipitous survey. IV
- Short Name:
- J/A+A/476/1191
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- X-ray sources at intermediate fluxes (a few x10^-14^erg/cm^2^/s) with a sky density of ~100deg^-2^ are responsible for a significant fraction of the cosmic X-ray background at various energies below 10keV. The aim of this paper is to provide an unbiased and quantitative description of the X-ray source population at these fluxes and in various X-ray energy bands. We present the XMM-Newton Medium sensitivity Survey (XMS), including a total of 318 X-ray sources found among the serendipitous content of 25 XMM-Newton target fields. The XMS comprises four largely overlapping source samples selected at soft (0.5-2keV), intermediate (0.5-4.5keV), hard (2-10keV) and ultra-hard (4.5-7.5keV) bands, the first three of them being flux-limited.
- ID:
- ivo://CDS.VizieR/J/A+A/493/339
- Title:
- XMM-Newton serendipitous Survey. V.
- Short Name:
- J/A+A/493/339
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- Pointed observations with XMM-Newton provide the basis for creating catalogues of X-ray sources detected serendipitously in each field. This paper describes the creation and characteristics of the 2XMM catalogue. The 2XMM catalogue has been compiled from a new processing of the XMM-Newton EPIC camera data. The main features of the processing pipeline are described in detail. The catalogue, the largest ever made at X-ray wavelengths, contains 246897 detections drawn from 3491 public XMM-Newton observations over a 7-year interval, which relate to 191870 unique sources. The catalogue fields cover a sky area of more than 500deg^2^. The non-overlapping sky are a is ~360deg^2^ (~1% of the sky) as many regions of the sky are observed more than once by XMM-Newton. The catalogue probes a large sky area at the flux limit where the bulk of the objects that contribute to the X-ray background lie and provides a major resource for generating large, well-defined X-ray selected source samples, studying the X-ray source population and identifying rare object types. The main characteristics of the catalogue are presented, including its photometric and astrometric properties The 2XMMi catalogue is available as Cat. <IX/40> in VizieR.
- ID:
- ivo://esavo/xmm/siap
- Title:
- XMM-Newton SIAP Service for Pointed Observation
- Short Name:
- XMM-Newton SIAP
- Date:
- 30 Apr 2024 07:24:45
- Publisher:
- European Space Agency
- Description:
- The European Space Agency's (ESA) X-ray Multi-Mirror Mission (XMM-Newton) was launched by an Ariane 504 on December 10th 1999. XMM-Newton is ESA's second cornerstone of the Horizon 2000 Science Programme. It carries 3 high throughput X-ray telescopes with an unprecedented effective area, and an optical monitor, the first flown on a X-ray observatory. The large collecting area and ability to make long uninterrupted exposures provide highly sensitive observations. Since Earth's atmosphere blocks out all X-rays, only a telescope in space can detect and study celestial X-ray sources. The XMM-Newton mission is helping scientists to solve a number of cosmic mysteries, ranging from the enigmatic black holes to the origins of the Universe itself. Observing time on XMM-Newton is being made available to the scientific community, applying for observational periods on a competitive basis.
- ID:
- ivo://esavo/xmm/siap-slew
- Title:
- XMM-Newton SIAP Service for Slew Observations
- Short Name:
- XMM-Newton SIAP
- Date:
- 30 Apr 2024 07:24:59
- Publisher:
- European Space Agency
- Description:
- The European Space Agency's (ESA) X-ray Multi-Mirror Mission (XMM-Newton) was launched by an Ariane 504 on December 10th 1999. XMM-Newton is ESA's second cornerstone of the Horizon 2000 Science Programme. It carries 3 high throughput X-ray telescopes with an unprecedented effective area, and an optical monitor, the first flown on a X-ray observatory. The large collecting area and ability to make long uninterrupted exposures provide highly sensitive observations. Since Earth's atmosphere blocks out all X-rays, only a telescope in space can detect and study celestial X-ray sources. The XMM-Newton mission is helping scientists to solve a number of cosmic mysteries, ranging from the enigmatic black holes to the origins of the Universe itself. Observing time on XMM-Newton is being made available to the scientific community, applying for observational periods on a competitive basis.
- ID:
- ivo://CDS.VizieR/J/A+A/480/611
- Title:
- XMM-Newton Slew Survey catalogue, XMMSL1
- Short Name:
- J/A+A/480/611
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- We report on the production of a large area, shallow, sky survey, from XMM-Newton slews. The great collecting area of the mirrors coupled with the high quantum efficiency of the EPIC detectors have made XMM-Newton the most sensitive X-ray observatory flown to date. We use data taken with the EPIC-pn camera during slewing manoeuvres to perform an X-ray survey of the sky. Data from 218 slews have been subdivided into small images and source searched. This has been done in three distinct energy bands; a soft (0.2-2keV) band, a hard (2-12keV) band and a total XMM-Newton band (0.2-12keV). Detected sources, have been quality controlled to remove artifacts and a catalogue has been drawn from the remaining sources. A "full" catalogue, containing 4710 detections and a "clean" catalogue containing 2692 sources have been produced, from 14% of the sky. In the hard X-ray band (2-12keV) 257 sources are detected in the clean catalogue to a flux limit of 4x10^-12^erg/s/cm^2^. The flux limit for the soft (0.2-2keV) band is 6x10^-13^erg/s/cm^2^ and for the total (0.2-12keV) band is 1.2x10^-12^erg/s/cm^2^. The source positions are shown to have an uncertainty of 8" (1{sigma} confidence).
- ID:
- ivo://nasa.heasarc/xmmslewcln
- Title:
- XMM-Newton Slew Survey Clean Source Catalog, v2.0
- Short Name:
- XMMSlewClean
- Date:
- 14 Feb 2025
- Publisher:
- NASA/GSFC HEASARC
- Description:
- This table contains the 'clean' sample of sources from the second catalog of X-ray sources found in slew data taken by the European Space Agency's XMM-Newton Observatory, XMMSL2 or XMMSLEW, Version 2.0. It has been constructed by members of the XMM-Newton Science Operations Centre (SOC) and the European Photon Imaging Camera (EPIC) consortium on behalf of ESA. This release uses results of work which was carried out within the framework of the EXTraS project ("Exploring the X-ray variable and Transient Sky"), funded from the EU's Seventh Framework Programme under grant agreement no.607452. This is the first release of XMMSL2 which contains data taken between revolutions 314 and 2758. The previous catalog was called XMMSL1_Delta6 and contained slews up to revolution 2441. XMMSL2 has been generated from 2114 slews, executed between 2001-08-26 and 2014-12-31, revolutions 314 to 2758. Not all slews made in this period have been used; slews with particularly high background throughout the slew or which gave processing problems have been rejected. A full discussion of the differences between XMMSL2 and XMMSL1 is given in Section 12 of the XMMSL2 Users Guide at <a href="https://www.cosmos.esa.int/web/xmm-newton/xmmsl2-ug">https://www.cosmos.esa.int/web/xmm-newton/xmmsl2-ug</a>. This database table was first created by the HEASARC in August 2007 based on the FITS version of XMMSL1D1 (v1.1) of the XMM Slew Catalog. The current version was created in April 2017 based on the FITS version of XMMSL2 (v2.0) of the XMM Slew Catalog obtained from the following URLs: <a href="http://nxsa.esac.esa.int/catalogues/xmmsl2_clean.fits.gz">http://nxsa.esac.esa.int/catalogues/xmmsl2_clean.fits.gz</a> (the clean sample), and <a href="http://nxsa.esac.esa.int/catalogues/xmmsl2_total.fits.gz">http://nxsa.esac.esa.int/catalogues/xmmsl2_total.fits.gz</a> (the total sample). <p> The HEASARC has endeavored to retain the same parameter names as in the ESA version, but has changed some so as to conform to the standard HEASARC parameters naming conventions, e.g., all error parameter names which ended in "_err" in the ESA version end in "_error" in this HEASARC version. For other parameters which have had their names changed, their original ESA names are listed in square brackets in their descriptions below. This is a service provided by NASA HEASARC .
- ID:
- ivo://nasa.heasarc/xmmslewegs
- Title:
- XMM-Newton Slew Survey Extragalactic Sample
- Short Name:
- XMMSLEWEGS
- Date:
- 14 Feb 2025
- Publisher:
- NASA/GSFC HEASARC
- Description:
- The ongoing XMM-Newton Slew Survey (XSS) provides coverage of a significant fraction of the sky in a broad X-ray bandpass. Although shallow by contemporary standards, in the "classical" 2-10 keV band of X-ray astronomy the XSS provides significantly better sensitivity than any currently available all-sky survey. The authors investigate the source content of the XSS, focusing on detections in the hard 2-10 keV band down to a very low threshold (>= 4 counts net of background). At the faint end, the survey reaches a flux sensitivity of roughly 3 x 10<sup>-12</sup> erg/cm<sup>2</sup>/s (2-10 keV). The starting point was a sample of 487 sources detected in the XSS (up to and including release XMMSL1d2) at high galactic latitude in the hard band. Through cross-correlation with published source catalogs from surveys spanning the electromagnetic spectrum from radio through to gamma-rays, they find that 45% of the sources have likely identifications with normal/active galaxies. A further 18% are associated with other classes of X-ray object (nearby coronally active stars, accreting binaries, clusters of galaxies), leaving 37% of the XSS sources with no current identification. The authors go on to define an XSS extragalactic sample comprised of 219 galaxies and active galaxies selected in the XSS hard band. They investigate the properties of this extragalactic sample including its X-ray log N - log S distribution, and it is this sample that is contained in this table. The authors find that, in the low-count limit, the XSS is, as expected, strongly affected by Eddington bias. There is also a very strong bias in the XSS against the detection of extended sources, most notably clusters of galaxies. A significant fraction of the detections at and around the low-count limit may be spurious. Nevertheless, it is possible to use the XSS to extract a reasonably robust sample of extragalactic sources, excluding galaxy clusters. The differential log N - log S relation of these extragalactic sources matches very well to the HEAO-1 A2 all-sky survey measurements at bright fluxes and to the 2XMM source counts at the faint end. The substantial sky coverage afforded by the XSS makes this survey a valuable resource for studying X-ray bright source samples, including those selected specifically in the hard 2 - 10 keV band. This table was created by the HEASARC in December 2012, based on the <a href="https://cdsarc.cds.unistra.fr/ftp/cats/J/A+A/548/A99">CDS Catalog J/A+A/548/A99</a> file tablea1.dat. This is a service provided by NASA HEASARC .
- ID:
- ivo://nasa.heasarc/xmmslewful
- Title:
- XMM-Newton Slew Survey Full Source Catalog, v2.0
- Short Name:
- XMMSlewFull
- Date:
- 14 Feb 2025
- Publisher:
- NASA/GSFC HEASARC
- Description:
- This table contains the 'total' sample of sources from the second catalog of X-ray sources found in slew data taken by the European Space Agency's XMM-Newton Observatory, XMMSL2 or XMMSLEW, Version 2.0. It has been constructed by members of the XMM-Newton Science Operations Centre (SOC) and the European Photon Imaging Camera (EPIC) consortium on behalf of ESA. This release uses results of work which was carried out within the framework of the EXTraS project ("Exploring the X-ray variable and Transient Sky"), funded from the EU's Seventh Framework Programme under grant agreement no.607452. This is the first release of XMMSL2 which contains data taken between revolutions 314 and 2758. The previous catalog was called XMMSL1_Delta6 and contained slews up to revolution 2441. XMMSL2 has been generated from 2114 slews, executed between 2001-08-26 and 2014-12-31, revolutions 314 to 2758. Not all slews made in this period have been used; slews with particularly high background throughout the slew or which gave processing problems have been rejected. A full discussion of the differences between XMMSL2 and XMMSL1 is given in Section 12 of the XMMSL2 Users Guide at <a href="https://www.cosmos.esa.int/web/xmm-newton/xmmsl2-ug">https://www.cosmos.esa.int/web/xmm-newton/xmmsl2-ug</a>. This database table was first created by the HEASARC in August 2007 based on the FITS version of XMMSL1D1 (v1.1) of the XMM Slew Catalog. The current version was created in April 2017 based on the FITS version of XMMSL2 (v2.0) of the XMM Slew Catalog obtained from the following URLs: <a href="http://nxsa.esac.esa.int/catalogues/xmmsl2_clean.fits.gz">http://nxsa.esac.esa.int/catalogues/xmmsl2_clean.fits.gz</a> (the clean sample), and <a href="http://nxsa.esac.esa.int/catalogues/xmmsl2_total.fits.gz">http://nxsa.esac.esa.int/catalogues/xmmsl2_total.fits.gz</a> (the total sample). <p> The HEASARC has endeavored to retain the same parameter names as in the ESA version, but has changed some so as to conform to the standard HEASARC parameters naming conventions, e.g., all error parameter names which ended in "_err" in the ESA version end in "_error" in this HEASARC version. For other parameters which have had their names changed, their original ESA names are listed in square brackets in their descriptions below. This is a service provided by NASA HEASARC .
- ID:
- ivo://CDS.VizieR/J/A+A/548/A99
- Title:
- XMM-Newton Slew Survey in 2-10keV
- Short Name:
- J/A+A/548/A99
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- The on-going XMM-Newton Slew Survey (XSS) provides coverage of a significant fraction of the sky in a broad X-ray bandpass. Although shallow by contemporary standards, in the "classical" 2-10keV band of X-ray astronomy, the XSS provides significantly better sensitivity than any currently available all-sky survey. We investigate the source content of the XSS, focussing on detections in the hard 2-10keV band down to a very low threshold (>=4counts net of background). At the faint end, the survey reaches a flux sensitivity of roughly 3x10^-12^erg/cm^2^/s (2-10keV). Our starting point was a sample of 487 sources detected in the XSS (up to and including release XMMSL1d2) at high galactic latitude in the hard band. Through cross-correlation with published source catalogues from surveys spanning the electromagnetic spectrum from radio through to gamma-rays, we find that 45% of the sources have likely identifications with normal/active galaxies. A further 18% are associated with other classes of X-ray object (nearby coronally active stars, accreting binaries, clusters of galaxies), leaving 37% of the XSS sources with no current identification. We go on to define an XSS extragalactic sample comprised of 219 galaxies and active galaxies selected in the XSS hard band. We investigate the properties of this extragalactic sample including its X-ray logN-logS distribution. We find that in the low-count limit, the XSS is, as expected, strongly affected by Eddington bias. There is also a very strong bias in the XSS against the detection of extended sources, most notably clusters of galaxies. A significant fraction of the detections at and around the low-count limit may be spurious. Nevertheless, it is possible to use the XSS to extract a reasonably robust sample of extragalactic sources, excluding galaxy clusters. The differential logN-logS relation of these extragalactic sources matches very well to the HEAO-1 A2 all-sky survey measurements at bright fluxes and to the 2XMM source counts at the faint end. The substantial sky coverage afforded by the XSS makes this survey a valuable resource for studying X-ray bright source samples, including those selected specifically in the hard 2-10keV band.
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