... characteristics, 2 Chilingarian & Zolotukhin lowed us to reject quasars and prominent broad-line active galactic nuclei ... constructed a photometric sample of 225 000 galaxies excluding quasars and bright active galactic nuclei (AGN) based on their ...
... simple p olynomial fitting technique without any clipping of outliers, we have to exclude strong active galactic nuclei (AGN) and quasars, as well as SDSS targeting artifacts (e.g. aircrafts, satellites, minor planets) and ob jects with wrong redshift ...