An Automatic Scanning and Recording Photometer for Night Sky Studies

1 October 1949

journal article
research article
Published by AIP Publishing in Review of Scientific Instruments

Vol. 20 (10) , 724-728
https://doi.org/10.1063/1.1741365

Abstract

This paper describes a photoelectric photometer which scans the entire sky in 32 minutes, recording the light energy in a 100A band as a function of altitude and azimuth. The light is chopped by a rotating shutter and detected by a photo‐multiplier tube, the output from which is amplified and synchronously rectified to produce a d.c. signal for the graphic recorder. Three different types of automatic scanning are provided, as well as a manual control of the various functions. The minimum energy which may be reliably recorded, using a 4‐inch, f:1 lens, is of the order of 10⁻¹³ watt.

Keywords

PHOTO MULTIPLIER TUBE

This publication has 2 references indexed in Scilit:

The Height to Upper-Atmosphere Emissions
Publications of the Astronomical Society of the Pacific, 1949
Observations of the Light of the Night Sky with a Photoelectric Photometer
The Astrophysical Journal, 1943