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A well characterised detection pipeline is an important ingredient for X-ray cluster surveys. We present the final development of the XXL Survey pipeline. The pipeline optimally uses X-ray information by combining many overlapping…

Instrumentation and Methods for Astrophysics · Physics 2018-11-21 L. Faccioli , F. Pacaud , J. -L. Sauvageot , M. Pierre , L. Chiappetti , N. Clerc , R. Gastaud , E. Koulouridis , A. M. C. Le Brun , A. Valotti

Context. Clusters of galaxies are important for cosmology and astrophysics. They may be discovered through either the summed optical/IR radiation originating from their member galaxies or via X-ray emission originating from the hot…

Cosmology and Nongalactic Astrophysics · Physics 2016-12-21 Alexey Mints , Axel Schwope , Simon Rosen , François-Xavier Pineau , Francisco Carrera

We describe the final product of the North Celestial Cap Survey (NCC Survey, NCCS) - the optical-UV-IR merged catalogue for the region within 10 deg of the North Celestial Pole. The NCC region at DEC > 80 deg is poorly covered by modern…

Instrumentation and Methods for Astrophysics · Physics 2015-06-22 Evgeny Gorbikov , Noah Brosch

We use the two-point correlation function in redshift space, $\xi(s)$, to study the clustering of the galaxies and groups of the Nearby Optical Galaxy (NOG) Sample, which is a nearly all-sky, complete, magnitude-limited sample of \~7000…

Astrophysics · Physics 2007-05-23 G. Giuricin , S. Samurovic , M. Girardi , M. Mezzetti , C. Marinoni

We examine the relationship between the total X-ray and optical luminosities of groups and clusters of galaxies taken from various samples in the literature. The clusters and groups were drawn from four different catalogs: (1) the Abell/ACO…

Astrophysics · Physics 2007-05-23 Christopher J. Miller , Adrian L. Melott , Robert C. Nichol

We present XMM-Newton observations of three optically-selected z > 0.6 clusters from the ESO Distant Cluster Survey (EDisCS), comprising the first results of a planned X-ray survey of the full EDisCS high-redshift sample. The EDisCS…

We present an efficient and robust approach for extracting clusters of galaxies from weak lensing survey data and measuring their properties. We use simple, physically-motivated cluster models appropriate for such sparse, noisy data, and…

Astrophysics · Physics 2008-10-07 F. Feroz , P. J. Marshall , M. P. Hobson

Aims: We present a wide-field multi-color survey of a homogeneous sample of eleven clusters of galaxies for which we measure total masses and mass distributions from weak lensing. Methods: The eleven clusters in our sample are all X-ray…

Astrophysics · Physics 2009-11-13 S. Bardeau , G. Soucail , J. P. Kneib , O. Czoske , H. Ebeling , P. Hudelot , I. Smail , G. P. Smith

We present the compilation and properties of a Meta-Catalogue of X-ray detected Clusters of galaxies, the MCXC. This very large catalogue is based on publicly available ROSAT All Sky Survey-based (NORAS, REFLEX, BCS, SGP, NEP, MACS, and…

Cosmology and Nongalactic Astrophysics · Physics 2015-05-19 R. Piffaretti , M. Arnaud , G. W. Pratt , E. Pointecouteau , J. -B. Melin

We describe the initial results of a programme to detect and identify extended X-ray sources found serendipitously in XMM-Newton observations. We have analysed 186 EPIC-PN images at high galactic latitude with a limiting flux of $1\times…

Astrophysics · Physics 2009-11-07 A. D. Schwope , G. Lamer , D. Burke , M. Elvis , M. G. Watson , M. P. Schulze , G. Szokoly , T. Urrutia

Determining the scaling relations between galaxy cluster observables requires large samples of uniformly observed clusters. We measure the mean X-ray luminosity--optical richness (L_X--N_200) relation for an approximately volume-limited…

We present 279 galaxy cluster candidates at $z > 1.3$ selected from the 94 deg$^{2}$ Spitzer South Pole Telescope Deep Field (SSDF) survey. We use a simple algorithm to select candidate high-redshift clusters of galaxies based on…

Cosmology and Nongalactic Astrophysics · Physics 2015-06-19 A. Rettura , J. Martinez-Manso , D. Stern , S. Mei , M. L. N. Ashby , M. Brodwin , D. Gettings , A. H. Gonzalez , S. A. Stanford , J. G. Bartlett

Abridged] We present here new results on the space density of rich, optically-selected, clusters of galaxies at low redshift (z<0.15). These results are based on the application of the matched filter cluster-finding algorithm to 1067 deg2…

Astrophysics · Physics 2009-10-31 D. A. Bramel , R. C. Nichol , A. C. Pope

We evaluate in a homogeneous way the optical masses of 170 nearby clusters (z< 0.15). The sample includes both data from the literature and the new ENACS data (Katgert et al. 1996, 1998). On the assumption that mass follows the galaxy…

Astrophysics · Physics 2009-10-30 M. Girardi , G. Giuricin , F. Mardirossian , M. Mezzetti , W. Boschin

We interpret and model the statistical weak lensing measurements around 130,000 groups and clusters of galaxies in the Sloan Digital Sky Survey presented by Sheldon et al. 2007 (Paper I). We present non-parametric inversions of the 2D shear…

The detection of the extended X-ray-emission of the intracluster medium by the first SRG/eROSITA All-Sky Survey (eRASS1), combined with optical and near-infrared follow-up, resulted in the identification of more than 12000 galaxy clusters,…

An atlas of deep, wide-field R-band CCD images of a complete sample of distant, X-ray-selected clusters of galaxies is presented. These clusters are the 41 most distant (z>= 0.15) and most X-ray luminous (Lx >= 2x10**44 erg\s-1) clusters in…

Astrophysics · Physics 2008-11-26 I. M. Gioia , G. A. Luppino

We continue the study of the first sample of shear-selected clusters (Wittman et al. 2006) from the initial 8.6 square degrees of the Deep Lens Survey (DLS, Wittman et al. 2002); a sample with well-defined selection criteria corresponding…

Cosmology and Nongalactic Astrophysics · Physics 2017-05-03 Amruta J. Deshpande , John P. Hughes , David Wittman

We stacked the X-ray data from the ROSAT All Sky Survey for over 4,000 clusters selected from the 2MASS catalog and divided into five richness classes. We detected excess X-ray emission over background at the center of the stacked images in…

Astrophysics · Physics 2015-06-24 Xinyu Dai , Christopher S. Kochanek , Nicholas D. Morgan

We present the results from a shallow (2-10 ksec) XMM/2dF survey. Our survey covers 18 XMM fields ($\sim 5 {\rm deg}^2$) previously spectroscopically followed up with the Anglo-Australian telescope 2-degree field facility. About half of the…

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