Recalibration of the KPNO spot sensitometers

Details Recalibration of the KPNO spot sensitometers Recalibration of the KPNO spot sensitometers

Apr 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984asph.conf....1s&link_type=abstract

In Royal Observatory Astron. Phot. 1984 p 1-9 (SEE N85-16102 07-35)

Astronomy and Astrophysics

Astronomy

Astronomical Observatories, Calibrating, Sensitometry, Astronomical Photography, Photomultiplier Tubes, Ultraviolet Photography

Scientific paper

Two techniques for calibrating spot sensitometers are described. The first method involves a comparison of the wedge to a spot box with an accurately known source, but it is too time consuming. The second method uses a GaAs photomultiplier in a cold box, with light from the sensitometer being transmitted to the box via a fiber optic probe. This enables direct measurement of intensity, eliminating the need for photographic methods. Comparison of UV calibration of original calibration data and recalibration data reveals significant differences, with the recalibration being as accurate as possible with these sensitometers.

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