An Optical Catalog of Galaxy Clusters Obtained From an Adaptive Matched Filter Finder Applied to Sloan Digital Sky Survey Data Release 6

P., Banerjee,; Szabo, T.; Pierpaoli, E.; Franco, Gerardo; Ortiz, María J.; Oramas, Aris; Tornello, B.

doi:10.1088/0004-637x/736/1/21

Cited by 128 publications

(167 citation statements)

References 66 publications

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“…In Paper I, we have optically confirmed about a quarter of the X-ray cluster candidates through cross-correlation with previously identified clusters in four optical cluster catalogues (Hao et al 2010;Wen et al 2009;Koester et al 2007;Szabo et al 2011). The remainder of the X-ray cluster candidates are either distant cluster candidates beyond the SDSS detection limits, that is, z ≥ 0.6, which need follow-up imaging and spectroscopic confirmation, or there are overdensities of galaxies at the X-ray cluster positions that were not recognized by any previous optical cluster finders (see e.g.…”

Section: Constructing the Optically Confirmed Cluster Samplementioning

confidence: 80%

“…Koester et al 2007;Hao et al 2010), or an overdensity of galaxies in the photometric redshift space (Wen et al 2009). Galaxy clusters are also identified by convolving 1 http://www.ledas.ac.uk/flix/flix.html the optical galaxy survey with a set of filters in position, magnitude, and redshift space based on modelling the cluster and field galaxy distributions (Szabo et al 2011).…”

Section: Constructing the Optically Confirmed Cluster Samplementioning

confidence: 99%

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The 2XMMi/SDSS Galaxy Cluster Survey

Takey

Schwope

Lamer

2013

A&A

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Aims. We compile a sample of X-ray-selected galaxy groups and clusters from the XMM-Newton serendipitous source catalogue (2XMMi-DR3) with optical confirmation and redshift measurement from the Sloan Digital Sky Survey (SDSS). We present an analysis of the X-ray properties of this new sample with particular emphasis on the X-ray luminosity-temperature (L X − T ) relation. Methods. The X-ray cluster candidates were selected from the 2XMMi-DR3 catalogue in the footprint of the SDSS-DR7. We developed a finding algorithm to search for overdensities of galaxies at the positions of the X-ray cluster candidates in the photometric redshift space and to measure the redshifts of the clusters from the SDSS data. For optically confirmed clusters with good quality X-ray data we derived the X-ray flux, luminosity, and temperature from proper spectral fits, while the X-ray flux for clusters with low-quality X-ray data was obtained from the 2XMMi-DR3 catalogue. Results. The detection algorithm provides the photometric redshift of 530 galaxy clusters. Of these, 310 clusters have a spectroscopic redshift for at least one member galaxy. About 75 percent of the optically confirmed cluster sample are newly discovered X-ray clusters. Moreover, 301 systems are known as optically selected clusters in the literature while the remainder are new discoveries in X-ray and optical bands. The optically confirmed cluster sample spans a wide redshift range 0.03−0.70 (median z = 0.32). In this paper, we present the catalogue of X-ray-selected galaxy groups and clusters from the 2XMMi/SDSS galaxy cluster survey. The catalogue has two subsamples: (i) a cluster sample comprising 345 objects with their X-ray spectroscopic temperature and flux from the spectral fitting; and (ii) a cluster sample consisting of 185 systems with their X-ray flux from the 2XMMi-DR3 catalogue, because their X-ray data are insufficient for spectral fitting. For each cluster, the catalogue also provides the X-ray bolometric luminosity and the cluster mass at R 500 based on scaling relations and the position of the likely brightest cluster galaxy (BCG). The updated L X − T relation of the current sample with X-ray spectroscopic parameters is presented. We found the slope of the L X − T relation to be consistent with published ones. We see no evidence for evolution in the slope and intrinsic scatter of the L X − T relation with redshift when excluding the low-luminosity groups.

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Section: Constructing the Optically Confirmed Cluster Samplementioning

confidence: 80%

Section: Constructing the Optically Confirmed Cluster Samplementioning

confidence: 99%

The 2XMMi/SDSS Galaxy Cluster Survey

Takey

Schwope

Lamer

2013

A&A

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“…Milkeraitis et al, 2010;Adami et al, 2010), the SDSS has led to the publication of several moderately deep (z 0.5) and wide catalogs, which can contain upwards of 50,000 clusters (e.g. Koester et al, 2007;Wen et al, 2009;Hao et al, 2010;Szabo et al, 2011). Extensions that reach out to z ≈ 1 over 1000 deg 2 or more from current or near future photometric surveys -such as RCS-2, DES, Pan-STARRS, and HSC -will expand samples to the hundreds of thousands.…”

Section: The Current State Of Playmentioning

confidence: 99%

Observational probes of cosmic acceleration

et al. 2013

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The accelerating expansion of the universe is the most surprising cosmological discovery in many decades, implying that the universe is dominated by some form of "dark energy" with exotic physical properties, or that Einstein's theory of gravity breaks down on cosmological scales. The profound implications of cosmic acceleration have inspired ambitious efforts to understand its origin, with experiments that aim to measure the history of expansion and growth of structure with percent-level precision or higher. We review in detail the four most well established methods for making such measurements: Type Ia supernovae, baryon acoustic oscillations (BAO), weak gravitational lensing, and the abundance of galaxy clusters. We pay particular attention to the systematic uncertainties in these techniques and to strategies for controlling them at the level needed to exploit "Stage IV" dark energy facilities such as BigBOSS, LSST, Euclid, and WFIRST. We briefly review a number of other approaches including redshift-space distortions, the Alcock-Paczynski effect, and direct measurements of the Hubble constant H 0 . We present extensive forecasts for constraints on the dark energy equation of state and parameterized deviations from General Relativity, achievable with Stage III and Stage IV experimental programs that incorporate supernovae, BAO, weak lensing, and cosmic microwave background data. We also show the level of precision required for clusters or other methods to provide constraints competitive with those of these fiducial programs. We emphasize the value of a balanced program that employs several of the most powerful methods in combination, both to cross-check systematic uncertainties and to take advantage of complementary information. Surveys to probe cosmic acceleration produce data sets that support a wide range of scientific investigations, and they continue the longstanding astronomical tradition of mapping the universe in ever greater detail over ever larger scales.

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“…REFLEX Böhringer et al 2001; NORAS Böhringer et al 2000;or MACS Ebeling et al 2001), which reach a maximum redshift of z ∼ 0.5 with a few objects beyond. Examples of the latter include catalogues based on SDSS data (Koester et al 2007;Wen et al 2009Wen et al , 2012Hao et al 2010;Szabo et al 2011), which extend up to about the same redshift threshold. In the past few years, millimeter surveys have released the first sets of galaxy clusters discovered by means of the thermal SZ effect (e.g.…”

Section: Introductionmentioning

confidence: 99%

Planckintermediate results

Ade¹,

Aghanim²,

Arnaud³

et al. 2016

A&A

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We present the results of approximately three years of observations of Planck Sunyaev-Zeldovich (SZ) sources with telescopes at the Canary Islands observatories as part of the general optical follow-up programme undertaken by the Planck Collaboration. In total, 78 SZ sources are discussed. Deep-imaging observations were obtained for most of these sources; spectroscopic observations in either in long-slit or multi-object modes were obtained for many. We effectively used 37.5 clear nights. We found optical counterparts for 73 of the 78 candidates. This sample includes 53 spectroscopic redshift determinations, 20 of them obtained with a multi-object spectroscopic mode. The sample contains new redshifts for 27 Planck clusters that were not included in the first Planck SZ source catalogue (PSZ1).

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An Optical Catalog of Galaxy Clusters Obtained From an Adaptive Matched Filter Finder Applied to Sloan Digital Sky Survey Data Release 6

Cited by 128 publications

References 66 publications

The 2XMMi/SDSS Galaxy Cluster Survey

The 2XMMi/SDSS Galaxy Cluster Survey

Observational probes of cosmic acceleration

Planckintermediate results

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