2012/12/19 by G. C. Sloan, Sloan, G. C., D. Ludovici +1
Physics and Astronomy · #Astrophysics of Galaxies (astro-ph.GA) #FOS: Physical sciences #Instrumentation and Methods for Astrophysics (astro-ph.IM) #astro-ph.GA #astro-ph.IM
paper · pdf · doi:10.48550/arxiv.1212.4843
9 pages, 3 figures
arxiv created 2012/12/19 · arxiv updated 2012/12/21
We investigate how the shape of a spectrum in the Short-Low module on the IRS varies with its overall throughput, which depends on how well centered a source is in the spectroscopic slit. Using flux ratios to quantify the overall slope or color of the spectrum and plotting them vs. the overall throughput reveals a double-valued function, which arises from asymmetries in the point spread function. We use this plot as a means of determining which individual spectra are valid for calibrating the IRS.