Construction of a 1-3 micron infrared photometer and its test observations

Details Construction of a 1-3 micron infrared photometer and its test observations Construction of a 1-3 micron infrared photometer and its test observations

Jun 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982cha%26a...6..153c&link_type=abstract

Chinese Astronomy and Astrophysics, Volume 6, Issue 2, p. 153-157.

Astronomy and Astrophysics

Astrophysics

Scientific paper

We report on the design and construction of a l-3μ infrared photometer. We use a pre-focus rotating chopper to effect modulation and, unlike some previous designs, we use the chopper to feed in the sky background only, and use a fixed mirror to feed in the star signal. In this way, excess demand on the precision setting of the rotating chopper Is avoided. Test observations on a 1-m telescope show that our photometer is capable of observing all the IRC sources with an accuracy better than O.lmag at a time constant of 2 minutes.

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