Standard stars observed with the Infrared Spectrograph on the Spitzer Space Telescope

Details Standard stars observed with the Infrared Spectrograph on the Spitzer Space Telescope Standard stars observed with the Infrared Spectrograph on the Spitzer Space Telescope

Jan 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011aas...21725421s&link_type=abstract

American Astronomical Society, AAS Meeting #217, #254.21; Bulletin of the American Astronomical Society, Vol. 43, 2011

Astronomy and Astrophysics

Astronomy

Scientific paper

The Infrared Spectrograph (IRS) on the Spitzer Space Telescope observed a large suite of potential standard stars during the cryogenic phase of the Spitzer mission. We present spectral templates for those standards observed most frequently and use those templates to produce calibrated spectra of the remaining standards. We discuss the overall photometric calibration in the mid to far infrared, comparing observations with the IRS Red Peak-Up array, the MIPS 24-um array, the IRAS Faint-Source Catalog (FSC), and the Midcourse Space Experiment (MSX). An examination of the SiO band at 8 um in K giants reveals the difficulty of predicting its strength, and an examination at longer wavelengths reveals the importance of the OH band structure in K giants, which must be addressed if the spectrophotometric calibration is to be better than 1.5%. We also examine what the long-wavelength behavior of the spectra can tell us about the suitability of Planck functions, Engelke functions, and model spectra to estimate the overall shape of the spectra.

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