This is a preview. Log in through your library . Oxford University Press is a department of the University of Oxford. It furthers the University's objective of excellence in research, scholarship, and ...
This is a preview. Log in through your library . Abstract Photoelectric photometry in UBVRI is presented for 21 stars in two fields near the radio galaxy NGC 5128 (Centaurus A). The visual magnitudes ...
IN his paper on the registering microphotometer, P. P. Koch (Annalen der Physik, iv. 39, p. 705, 1912) describes an arrangement consisting of two similar photoelectric cells connected to an ...
A descriptive account of the discussion on photoelectric cells arranged by the Physical and Optical Societies appeared in the issue of NATURE for June 21, 1930. This volume contains the original ...
A new instrument designed to investigate the center of the Milky Way galaxy has been announced by Gerhard R.P. Miczaika, Lecturer on Astronomy. The device, an infra-red stellar photometer, picks up ...
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