2011/08/03 by G. C. Sloan, Sloan, G. C., Dominic Ludovici +2
Engineering · Physics and Astronomy · #Adaptive optics and wavefront sensing #Astronomy and Astrophysical Research #FOS: Physical sciences #Instrumentation and Methods for Astrophysics (astro-ph.IM) #Spacecraft and Cryogenic Technologies #astro-ph.IM
paper · pdf · doi:10.48550/arxiv.1108.0907
IRS Technical Report - posted at http://isc.astro.cornell.edu/IRS/TechnicalReports
arxiv created 2011/08/03 · openalex publication_date 2011/08/03 · arxiv updated 2011/08/04 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
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.