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

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

2011-08-03

arxiv.org/abs/1108.0907v1

Astronomy and Astrophysics

Astrophysics

Instrumentation and Methods for Astrophysics

IRS Technical Report - posted at http://isc.astro.cornell.edu/IRS/TechnicalReports

Scientific paper

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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