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A 3-field differential photometer for far infrared anisotropy measurements

P CALISSE,P DEBERNARDIS,S MASI

Infrared Physics（1989）

Cited 3|Views7
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Abstract
We describe a differential photometer developed for ground based observations of the Cosmic Background Radiation anisotropy and of diffuse galactic dust emission at millimetric wavelengths. Preliminary tests, which demonstrate the advantages of the 3 fields modulation with respect to the more conventional single subtraction, are reported. Both atmospheric fluctuations and instrumental offset are significantly reduced.
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Key words
differential photometer,anisotropy
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