eROSITA on SRG

Predehl, P.; Andritschke, Robert; Böhringer, H.; Bornemann, W.; Bräuninger, H.; Brunner, H.; Brusa, M.; Burkert, Wolfgang; Burwitz, V.; Cappelluti, N.; Churazov, E.; Dennerl, K.; Eder, Josef; Elbs, Johannes; Freyberg, M. J.; Friedrich, Péter; Fürmetz, Maria; Gaida, Roland; Hälker, Olaf; Hartner, Gisela; Hasinger, G.; Hermann, S.; Huber, Heinrich J.; Kendziorra, E.; Kienlin, A. von; Kink, W.; Kreykenbohm, I.; Lamer, G.; Lapchov, I.; Lehmann, Katharina; Meidinger, Norbert; Mican, Benjamin; Mohr, J. J.; Mühlegger, M.; Müller, S.; Nandra, K.; Pavlinsky, M.; Pfeffermann, E.; Reiprich, T. H.; Robrade, J.; Rohé, Christian; Santangelo, A.; Schächner, G.; Schanz, T.; Schmid, Christian; Schmitt, J. H. M. M.; Schreib, Reiner; Schrey, F.; Schwope, A. D.; Steinmetz, Matthias; Strüder, L.; Sunyaev, R.; Tenzer, C.; Tiedemann, Lars; Vongehr, Monika; Wilms, J.

doi:10.1117/12.856577

Cited by 69 publications

(33 citation statements)

References 1 publication

Supporting

Mentioning

Contrasting

Order By: Relevance

“…We also require the significance of the flux determination associated with the detection to be above 4.6σ . The problem described above is typical to shallow surveys and, for example, will be important for eROSITA (Predehl et al 2010). In deep surveys, extended source detection is background limited, which requires more counts for large scales to be detected at similar thresholds, and so the flux on small scales is always detected from a point source.…”

Section: X-ray Datamentioning

confidence: 99%

Brightest X-Ray Clusters of Galaxies in the CFHTLS Wide Fields: Catalog and Optical Mass Estimator

Mirkazemi

Finoguenov

Pereira

et al. 2015

ApJ

View full text Add to dashboard Cite

The Canada-France-Hawaii Telescope Legacy Survey (CFHTLS) presents a unique data set for weak-lensing studies, having high-quality imaging and deep multiband photometry. We have initiated an XMM-CFHTLS project to provide X-ray observations of the brightest X-ray-selected clusters within the wide CFHTLS area. Performance of these observations and the high quality of CFHTLS data allow us to revisit the identification of X-ray sources, introducing automated reproducible algorithms, based on the multicolor red sequence finder. We have also introduced a new optical mass proxy. We provide the calibration of the red sequence observed in the Canada-France-Hawaii filters and compare the results with the traditional single-color red sequence and photo-z. We test the identification algorithm on the subset of highly significant XMM clusters and identify 100% of the sample. We find that the integrated z-band luminosity of the red sequence galaxies correlates well with the X-ray luminosity, with a surprisingly small scatter of 0.20 dex. We further use the multicolor red sequence to reduce spurious detections in the full XMM and ROSAT All-Sky Survey (RASS) data sets, resulting in catalogs of 196 and 32 clusters, respectively. We made spectroscopic follow-up observations of some of these systems with HECTOSPEC and in combination with BOSS DR9 data. We also describe the modifications needed to the source detection algorithm in order to maintain high purity of extended sources in the shallow X-ray data. We also present the scaling relation between X-ray luminosity and velocity dispersion.

show abstract

Section: X-ray Datamentioning

confidence: 99%

Brightest X-Ray Clusters of Galaxies in the CFHTLS Wide Fields: Catalog and Optical Mass Estimator

Mirkazemi

Finoguenov

Pereira

et al. 2015

ApJ

View full text Add to dashboard Cite

show abstract

“…The upcoming eROSITA mission will perform a four-year all sky-survey program (Predehl et al 2010), during which a mean exposure time of 2.0 ks will be observed. This mission will play a major role in identifying the X-ray coronae of all nearby massive spiral galaxies.…”

Section: Future Prospectsmentioning

confidence: 99%

Hot X-Ray Coronae Around Massive Spiral Galaxies: A Unique Probe of Structure Formation Models

Bogdán

Forman

Vogelsberger

et al. 2013

ApJ

110

115

View full text Add to dashboard Cite

Luminous X-ray gas coronae in the dark matter halos of massive spiral galaxies are a fundamental prediction of structure formation models, yet only a few such coronae have been detected so far. In this paper, we study the hot X-ray coronae beyond the optical disks of two "normal" massive spirals, NGC 1961 and NGC 6753. Based on XMM-Newton X-ray observations, hot gaseous emission is detected to ∼60 kpc-well beyond their optical radii. The hot gas has a best-fit temperature of kT ∼ 0.6 keV and an abundance of ∼0.1 Solar, and exhibits a fairly uniform distribution, suggesting that the quasi-static gas resides in hydrostatic equilibrium in the potential well of the galaxies. The bolometric luminosity of the gas in the (0.05-0.15)r 200 region (r 200 is the virial radius) is ∼6 × 10 40 erg s −1 for both galaxies. The baryon mass fractions of NGC 1961 and NGC 6753 are f b,NGC 1961 ∼ 0.11 and f b,NGC 6753 ∼ 0.09, which values fall short of the cosmic baryon fraction. The hot coronae around NGC 1961 and NGC 6753 offer an excellent basis to probe structure formation simulations. To this end, the observations are confronted with the moving mesh code arepo and the smoothed particle hydrodynamics code gadget. Although neither model gives a perfect description, the observed luminosities, gas masses, and abundances favor the arepo code. Moreover, the shape and the normalization of the observed density profiles are better reproduced by arepo within ∼0.5r 200 . However, neither model incorporates efficient feedback from supermassive black holes or supernovae, which could alter the simulated properties of the X-ray coronae. With the further advance of numerical models, the present observations will be essential in constraining the feedback effects in structure formation simulations.

show abstract

“…Nevertheless, their Figure 9 shows that the Galaxy component, at high Galactic latitudes, is approximately white noise at sub-degree scales. A more accurate measurement will be possible only with the forthcoming launch of eROSITA (Predehl et al 2010) in late 2014. Thus, while irrelevant for the CXB-CIB cross-power spectrum (see below), correcting for the Galaxy would reduce our estimate of the extragalactic CXB auto-power spectrum, particularly on the smallest scales.…”

Section: Cxb Power Spectramentioning

confidence: 99%

Cross-Correlating Cosmic Infrared and X-Ray Background Fluctuations: Evidence of Significant Black Hole Populations Among the Cib Sources

Cappelluti

Kashlinsky

Arendt

et al. 2013

ApJ

169

View full text Add to dashboard Cite

In order to understand the nature of the sources producing the recently uncovered cosmic infrared background (CIB) fluctuations, we study cross-correlations between the fluctuations in the source-subtracted CIB from Spitzer/IRAC data and the unresolved cosmic X-ray background from deep Chandra observations. Our study uses data from the EGS/AEGIS field, where both data sets cover an 8 × 45 region of the sky. Our measurement is the cross-power spectrum between the IR and X-ray data. The cross-power signal between the IRAC maps at 3.6 μm and 4.5 μm and the Chandra [0.5-2] keV data has been detected, at angular scales 20 , with an overall significance of 3.8σ and 5.6σ , respectively. At the same time we find no evidence of significant cross-correlations at the harder Chandra bands. The cross-correlation signal is produced by individual IR sources with 3.6 μm and 4.5 μm magnitudes m AB 25-26 and [0.5-2] keV X-ray fluxes 7 × 10 −17 erg cm 2 s −1 . We determine that at least 15%-25% of the large scale power of the CIB fluctuations is correlated with the spatial power spectrum of the X-ray fluctuations. If this correlation is attributed to emission from accretion processes at both IR and X-ray wavelengths, this implies a much higher fraction of accreting black holes than among the known populations. We discuss the various possible origins for the cross-power signal and show that neither local foregrounds nor the known remaining normal galaxies and active galactic nuclei can reproduce the measurements. These observational results are an important new constraint on theoretical modeling of the near-IR CIB fluctuations.

show abstract

eROSITA on SRG

Cited by 69 publications

References 1 publication

Brightest X-Ray Clusters of Galaxies in the CFHTLS Wide Fields: Catalog and Optical Mass Estimator

Brightest X-Ray Clusters of Galaxies in the CFHTLS Wide Fields: Catalog and Optical Mass Estimator

Hot X-Ray Coronae Around Massive Spiral Galaxies: A Unique Probe of Structure Formation Models

Cross-Correlating Cosmic Infrared and X-Ray Background Fluctuations: Evidence of Significant Black Hole Populations Among the Cib Sources

Contact Info

Product

Resources

About