- ID:
- ivo://CDS.VizieR/J/A+A/564/A54
- Title:
- 2XMMi/SDSS Galaxy Cluster Survey. III.
- Short Name:
- J/A+A/564/A54
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- We present a sample of 383 X-ray selected galaxy groups and clusters with spectroscopic redshift measurements (up to z~0.79) from the 2XMMi/SDSS Galaxy Cluster Survey. The X-ray cluster candidates were selected as serendipitously detected sources from the 2XMMi-DR3 catalogue that were located in the footprint of the Sloan Digital Sky Survey (SDSS-DR7). The cluster galaxies with available spectroscopic redshifts were selected from the SDSS-DR10. We developed an algorithm for identifying the cluster candidates that are associated with spectroscopically targeted luminous red galaxies and for constraining the cluster spectroscopic redshift. A cross-correlation of the constructed cluster sample with published optically selected cluster catalogues yielded 264 systems with available redshifts. The present redshift measurements are consistent with the published values. The current cluster sample extends the optically confirmed cluster sample from our cluster survey by 67 objects. Moreover, it provides spectroscopic confirmation for 78 clusters among our published cluster sample, which previously had only photometric redshifts. Of the new cluster sample that comprises 67 systems, 55 objects are newly X-ray discovered clusters and 52 systems are sources newly discovered as galaxy clusters in optical and X-ray wavelengths. Based on the measured redshifts and the fluxes given in the 2XMMi-DR3 catalogue, we estimated the X-ray luminosities and masses of the cluster sample.
Number of results to display per page
Search Results
- ID:
- ivo://CDS.VizieR/J/A+A/471/1105
- Title:
- XMM-LSS at 240MHz and 610MHz
- Short Name:
- J/A+A/471/1105
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- The low-frequency radio survey of the XMM-Large Scale Structure (XMM-LSS) field aims to study the connection between the extragalactic radio source populations and their environment as traced by X-ray and optical emission. In this paper we present new radio observations of the XMM-LSS field carried out using the Giant Meterwave Radio Telescope at 240 and 610MHz. These observations complement the observations presented by Cohen at al. (2003, Cat. <J/ApJ/591/640>) and Tasse et al. (2006, Cat. <J/A+A/456/791>) at 74 and 325MHz with the Very Large Array. At 240 and 610MHz, we reach noise levels of ~2.5 and ~0.3mJy/beam, leading to the detection of 466 and 769 sources over 18.0 and 12.7 degree^2^ with resolutions of 14.7arcsec and 6.5arcsec respectively. Combining these data with the available source lists at 74, 325 (Tasse et al., 2006, Cat. <J/A+A/456/791>) and 1400MHz (NVSS), we build a multifrequency catalogue containing 1611 radio sources. We check for consistency of the astrometry and flux density estimates. We fit a simple synchrotron radiation model to the flux density measurements of the 318 radio sources being detected in at least 4 bands. While ~26% of them show signature of spectral ageing, ~6% show self absorption.
- ID:
- ivo://CDS.VizieR/J/MNRAS/382/279
- Title:
- XMM-LSS catalogue. Version I.
- Short Name:
- J/MNRAS/382/279
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- We provide the source list for the first 5.5 surveyed square degrees of the XMM-LSS, with a total of 3385 point-like or extended sources above a detection likelihood of 15 in either 0.5-2 or 2-10keV bands. The table at CDS contains the main parameters, while further parameters and data products (X-ray images and optical thumbnails) are available in the Milan XMM-LSS database site.
- ID:
- ivo://CDS.VizieR/J/MNRAS/429/1652
- Title:
- XMM-LSS catalogue. Version II.
- Short Name:
- J/MNRAS/429/1652
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- We present the final release of the multiwavelength XMM-Large Scale Structure (LSS) data set, covering the full survey area of 11.1deg^2^, with X-ray data processed with the latest XMM-LSS pipeline version. The present publication supersedes the catalogue from the first paper in this series, pertaining to the initial 5deg^2^. We provide X-ray source lists in the customary energy bands (0.5-2 and 2-10keV) for a total of 6721 objects in the deep full-exposure catalogue and 5572 in the catalogue limited to 10ks, above a detection likelihood of 15 in at least one band. We also provide a multiwavelength catalogue, cross-correlating our list with infrared, near-infrared, optical and ultraviolet catalogues. Customary data products, such as X-ray fits images and thumbnail images from the Canada-France-Hawaii Telescope Legacy Survey and the Spitzer Wide-Area Infrared Extragalactic Survey, are made available, together with our data base in Milan, which can be queried interactively.
- ID:
- ivo://CDS.VizieR/J/A+A/456/791
- Title:
- XMM-LSS field at 74 and 325MHz
- Short Name:
- J/A+A/456/791
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- The XMM Large Scale Structure survey (XMM-LSS) is an X-ray survey aimed at studying the large scale structure of the Universe. The XMM-LSS field is currently being followed up using observations across a wide range of wavelengths, and in this paper we present the observational results of a low frequency radio survey of the XMM-LSS field using the Very Large Array at 74 and 325MHz. This survey will map out the locations of the extragalactic radio sources relative to the large scale structure as traced by the X-ray emission. This is of particular interest because radio galaxies and radio loud AGN show strong and complex interactions with their small and larger scale environment, and different classes of radio galaxies are suggested to lie at different places with respect to the large scale structure.
- ID:
- ivo://CDS.VizieR/J/MNRAS/478/2132
- Title:
- XMM-LSS field. New XMM-Newton point-source cat.
- Short Name:
- J/MNRAS/478/2132
- Date:
- 08 Feb 2022 13:36:34
- Publisher:
- CDS
- Description:
- We present an X-ray point-source catalogue from the XMM-Large Scale Structure (XMM-LSS) survey region, one of the XMM-Spitzer Extragalactic Representative Volume Survey (XMM-SERVS) fields. We target the XMM-LSS region with 1.3Ms of new XMM-Newton AO-15 observations, transforming the archival X-ray coverage in this region into a 5.3deg^2^ contiguous field with uniform X-ray coverage totaling 2.7Ms of flare-filtered exposure, with a 46ks median PN exposure time. We provide an X-ray catalogue of 5242 sources detected in the soft (0.5-2keV), hard (2-10keV), and/or full (0.5-10keV) bands with a 1 per cent expected spurious fraction determined from simulations. A total of 2381 new X-ray sources are detected compared to previous source catalogues in the same area. Our survey has flux limits of 1.7x10^-15^, 1.3x10^-14^, and 6.5x10^-15^erg/cm^2^/s over 90 per cent of its area in the soft, hard, and full bands, respectively, which is comparable to those of the XMM-COSMOS survey. We identify multiwavelength counterpart candidates for 99.9 per cent of the X-ray sources, of which 93 per cent are considered as reliable based on their matching likelihood ratios. The reliabilities of these high-likelihood-ratio counterparts are further confirmed to be ~=97 per cent reliable based on deep Chandra coverage over ~=5 per cent of the XMM-LSS region. Results of multiwavelength identifications are also included in the source catalogue, along with basic optical-to-infrared photometry and spectroscopic redshifts from publicly available surveys. We compute photometric redshifts for X-ray sources in 4.5 deg^2^ of our field where forced-aperture multiband photometry is available; >70 per cent of the X-ray sources in this subfield have either spectroscopic or high-quality photometric redshifts.
- ID:
- ivo://CDS.VizieR/J/A+A/428/383
- Title:
- XMM-Newton Bright Serendipitous Survey
- Short Name:
- J/A+A/428/383
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- We present here "The XMM-Newton Bright Serendipitous Survey", composed of two flux-limited samples: the XMM-Newton Bright Source Sample (BSS, hereafter) and the XMM-Newton "Hard" Bright Source Sample (HBSS, hereafter) having a flux limit of fX~7x10^-14^erg/cm^2^/s in the 0.5-4.5keV and 4.5-7.5keV energy band, respectively. After discussing the main goals of this project and the survey strategy, we present the basic data on a complete sample of 400 X-ray sources (389 of them belong to the BSS, 67 to the HBSS with 56 X-ray sources in common) derived from the analysis of 237 suitable XMM-Newton fields (211 for the HBSS). At the flux limit of the survey we cover a survey area of 28.10 (25.17 for the HBSS) sq. deg. The extragalactic number-flux relationships (in the 0.5-4.5keV and in the 4.5-7.5keV energy bands) are in good agreement with previous and new results making us confident about the correctness of data selection and analysis.
- ID:
- ivo://CDS.VizieR/J/MNRAS/349/135
- Title:
- XMM-Newton/2dF survey. II.
- Short Name:
- J/MNRAS/349/135
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- In this paper we investigate the properties of low X-ray-to-optical flux ratio sources detected in a wide-area (2.5{deg}^2^) shallow [fX(0.5-8keV)~10^-14^erg/s/cm^2^] XMM-Newton survey. We find a total of 26 sources (5 per cent of the total X-ray-selected population) with log(fX)/f(opt)<-0.9 to the above flux limit. Optical spectroscopy is available for 20 of these low X-ray-to-optical flux ratio objects.
- ID:
- ivo://CDS.VizieR/J/A+A/468/353
- Title:
- XMM-Newton Extended Survey of Taurus
- Short Name:
- J/A+A/468/353
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- The XMM-Newton Extended Survey of the Taurus Molecular Cloud (XEST) surveys the most populated ~5 square degrees of the Taurus Molecular Cloud, using the XMM-Newton X-ray observatory to study the thermal structure, variability, and long-term evolution of hot plasma, to investigate the magnetic dynamo, and to search for new potential members of the association. We present overall correlations with fundamental stellar parameters that were derived from the previous literature. The present overview paper introduces the project and provides the basic results from the X-ray analysis of all sources detected in the XEST survey. Comprehensive tables summarize the stellar properties of all targets surveyed. The survey goes deeper than previous X-ray surveys of Taurus by about an order of magnitude and for the first time systematically accesses very faint and strongly absorbed TMC objects. We find a detection rate of 85% and 98% for classical and weak-line T Tauri stars (CTTS resp. WTTS), and identify about half of the surveyed protostars and brown dwarfs. Overall, 136 out of 169 surveyed stellar systems are detected. We describe an X-ray luminosity vs. mass correlation, discuss the distribution of X-ray-to-bolometric luminosity ratios, and show evidence for lower X-ray luminosities in CTTS compared to WTTS.
- ID:
- ivo://CDS.VizieR/J/MNRAS/351/31
- Title:
- XMM-Newton Galactic Plane Survey (XGPS)
- Short Name:
- J/MNRAS/351/31
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- We present the first results from the XMM-Newton Galactic Plane Survey (XGPS). In the first phase of the programme, 22 pointings were used to cover a region of approximately 3 deg^2^between 19{deg} and 22{deg} in Galactic longitude and +/-0.6{deg} in latitude. In total we have resolved over 400 point X-ray sources, at >=5{sigma} significance, down to a flux limit of ~2x10^-14^erg/s/cm^2^(2-10 keV).