SDSS spectra were used withthe Hubble law to create a map

VG

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This is an AGN Spectral EnergyDistribution (SED)

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We are picking quasars since theyoutshine their host galaxy

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Color

VG8

But redshift as well as temperature affects the color of a galaxy?

Resdshift :1+z=o/e

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Where shall we get our AGN?

• “The UV Properties of SDSS-Selected Quasars” by Trammel et al., 2007 (AJ, 133, 1780) provides the UV data

• There are 479 sources between at 0.1 < z < 0.5

• All the sources are in the WISE survey provides the IR data

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Redshift distribution ofour sources

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Color Magnitude Diagram(except for AGN instead of stars)

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End