Photoelectric photometry at a small college

Details Photoelectric photometry at a small college Photoelectric photometry at a small college

Aug 1976

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976s%26t....52...86g&link_type=abstract

Sky and Telescope, vol. 52, Aug. 1976, p. 86-90. Research supported by the North Georgia College.

Physics

Optics

2

Astronomical Observatories, Design Analysis, Electrophotometers, Calibrating, Cassegrain Optics, Cooling Systems, Photomultiplier Tubes, Universities, Variable Stars

Scientific paper

An inexpensive single-channel photoelectric photometer designed by the authors for use with the 16-in. Cassegrain reflector at North Georgia College is described. The construction of the photometer head is detailed. Special attention is given to the selection of photomultiplier tubes and cooling systems for different applications. Under dark-sky conditions objects as faint as 12th or 13th magnitude can be measured by this system using a temperature-stabilized EMI 6256 photomultiplier tube. Methods used for correction and calibration of the observations obtained by the system so that they can be reduced to a standard photoelectric system are outlined, and observations of the 10th-magnitude eclipsing variable star MN Cassiopeiae are presented.

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