2XMMp clusters in the SDSS

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Presentation transcript:

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

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

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

Correlation with SDSS Spectroscopic z = 0.223

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

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

photo-z / spectroscopic z

BCG colours

X-ray luminosities

Hardness ratios

Redshift distribution

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

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