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arXiv · 1108.0907

IRS-TR 11001: Temporal Responsivity Variations on the Red Peak-Up Sub-Array

G. C. Sloan·D. A. Ludovici
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Abstract

Over the course of the cryogenic mission of the Spitzer Space Telescope, the responsivity of the Red Peak-Up sub-array on the Infrared Spectograph (IRS) varied by ~2%, based on an analysis of five standard stars. The sensitivity dropped 1.7% after the first 14 IRS campaigns, then climbed back up 1.0% later in the mission. The uncertainty in these measurements is better than ~0.3%. The random variations in the Peak-Up photometry of the standard stars has a gaussian distribution of width ~2%, similar to the magnitude of the systematic temporal variations.

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G. C. Sloan, D. A. Ludovici. 2011-08-03. IRS-TR 11001: Temporal Responsivity Variations on the Red Peak-Up Sub-Array. https://arxiv.org/abs/1108.0907

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