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Extended XMM-Newton Clusters in SDSS: Correlation and Results

Explore extended sources in 2XMMp data correlated with SDSS, investigating 411 X-ray positions with SDSS galaxies. Photometry, redshifts, spectra, and images were analyzed. Findings include 247 redshifts, BCG colors, X-ray luminosities, and hardness ratios. Further analysis on the redshift distribution and possible effects of large-scale structure. Results reveal insights into the correlation between X-ray extended sources and SDSS.

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Extended XMM-Newton Clusters in SDSS: Correlation and Results

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  1. 2XMMp clusters in the SDSS Georg Lamer Axel Schwope Jan Kohnert

  2. Extended sources in 2XMMp • Total extended sources: 6271 • Selections: • offax > 4 arcmin, all EPIC full frame • abs (bII) > 20o , ext_ml > 5 • Remaining: 2136 • In SDSS DR5 footprint: 867 • Unique: 569 • After visual screening: 411

  3. Correlation with SDSS • Select SDSS galaxies within 1 arcmin of 411 X-ray positions • photometry (ugriz), photometric redshifts • spectra, spectroscopic redshifts • colour thumbnail images • Visual inspection of images, spectroscopic and photoscopic redshifts

  4. Correlation with SDSS Spectroscopic z = 0.223

  5. Correlation with SDSS photometric < z > = 0.38 (11 galaxies)

  6. Results • Sources investigated: 411 • No SDSS products: 12 • Spectroscopic redshifts: 116 • Photometric redshifts: 131 • Total SDSS redshifts: 247

  7. photo-z / spectroscopic z

  8. BCG colours

  9. X-ray luminosities

  10. Hardness ratios

  11. Redshift distribution

  12. 180O R.A. 240O 120O z 0.4 0.2 Effects of large scale structure?

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