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Abstract: We discuss selection of QSO candidates from the combined SDSS and GALEXcatalogues. We discuss properties of QSOs within the combined sample, and noteuncertainties in number counts and completeness, compared with other SDSS-basedsamples. We discuss colour and other properties with redshift within the sampleand the SEDs for subsets. We estimate the numbers of faint QSOs that areclassified as extended objects in the SDSS, and consequent uncertainties thatfollow.

Autor: J. B. Hutchings HIA, L. Bianchi JHU

Fuente: https://arxiv.org/

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