... found a luminosity function n(M) = const*10^{0.1*M}/exp(10^{0.4*(Ms-M)}) galaxies per unit volume per magnitude, using both field galaxies (assuming the Hubble law) and clusters of galaxies where no assumption about the redshift-magnitude law is needed ...
... Cluster Analysis of Faint Galaxies in the Direction of HERCULES Void . 68 . 2006AstL...32.. ... The C4 Clustering Algorithm: Clusters of Galaxies in the Sloan Digital Sky Survey . 79 . 2005yCat..21530429K . ...
... 1.0 arcmin, all disturbed galaxies, all star clusters in the Budapest Catalogue, and ... for other objects than galaxies or new stellar clusters discovered on the survey ...
... The number of expected optical photons from a 3.6m aperture teles cope in a certain integrat ion t ime along with an appropriate CCD detector allows us to detect very f aint objects inc lud ing point sources, galaxies and cluster of galaxies . ...
... of weak sources towards flat spectra (BLUM, DAVIS 1968; KELLERMANN, PAULINY-TOTH, DAVIS 1968), and KOMESAROFF et al. (1968) concluded from a comparison of optical and radio data for clusters of galaxies that the weaker radio emitters have flatter spectra ...