Photoelectric Photometry of Zwicky Galaxies

Astronomy and Astrophysics – Astronomy

Scientific paper

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Galaxies: Photometry, Catalogs

Scientific paper

Multiaperture photoelectric measurements in the B and V bands are presented for 601 galaxies in Volumes I, II, and V of Zwicky's catalogue. Large aperture observations were made in the 1960's with the Lick 3 m telescope and the USNO 1 m telescope. Systematics in Zwicky's magnitude system are investigated as a function of magnitude and direction in the sky. The photoelectric sample is argued to be representative of galaxies in Zwicky's catalogue at B ~ 15. A strong systematic error in Zwicky's magnitudes is apparent in Volume I fainter than m_z_ = 15.0. The B - V color distribution is discussed.

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