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Title:
The Infrared Spectrograph (IRS) on the Spitzer Space Telescope
Authors:
Houck, J. R.; Roellig, T. L.; van Cleve, J.; Forrest, W. J.; Herter, T.; Lawrence, C. R.; Matthews, K.; Reitsema, H. J.; Soifer, B. T.; Watson, D. M.; Weedman, D.; Huisjen, M.; Troeltzsch, J.; Barry, D. J.; Bernard-Salas, J.; Blacken, C. E.; Brandl, B. R.; Charmandaris, V.; Devost, D.; Gull, G. E.; Hall, P.; Henderson, C. P.; Higdon, S. J. U.; Pirger, B. E.; Schoenwald, J.; Sloan, G. C.; Uchida, K. I.; Appleton, P. N.; Armus, L.; Burgdorf, M. J.; Fajardo-Acosta, S. B.; Grillmair, C. J.; Ingalls, J. G.; Morris, P. W.; Teplitz, H. I.
Affiliation:
AA(Astronomy Department, Cornell University, Ithaca, NY 14853-6801 .), AB(NASA Ames Research Center, MS 245-6, Moffett Field, CA 94035-1000.), AC(Ball Aerospace and Technologies Corporation, 1600 Commerce Street, Boulder, CO 80301.), AD(Department of Physics and Astronomy, University of Rochester, Rochester, NY 14627.), AE(Astronomy Department, Cornell University, Ithaca, NY 14853-6801 .), AF(Jet Propulsion Laboratory, California Institute of Technology, MC 169-327, Pasadena, CA 91125.), AG(Palomar Observatory, California Institute of Technology, Pasadena, CA 91125.), AH(Ball Aerospace and Technologies Corporation, 1600 Commerce Street, Boulder, CO 80301.), AI(Spitzer Science Center, California Institute of Technology, MC 220-6, Pasadena, CA 91125.), AJ(Department of Physics and Astronomy, University of Rochester, Rochester, NY 14627.), AK(Astronomy Department, Cornell University, Ithaca, NY 14853-6801 .), AL(Ball Aerospace and Technologies Corporation, 1600 Commerce Street, Boulder, CO 80301.), AM(Ball Aerospace and Technologies Corporation, 1600 Commerce Street, Boulder, CO 80301.), AN(Astronomy Department, Cornell University, Ithaca, NY 14853-6801 .), AO(Astronomy Department, Cornell University, Ithaca, NY 14853-6801 .), AP(Astronomy Department, Cornell University, Ithaca, NY 14853-6801 .), AQ(Leiden University, 2300 RA Leiden, Netherlands.), AR(Astronomy Department, Cornell University, Ithaca, NY 14853-6801 .; Chercheur Associé, Observatoire de Paris, F-75014 Paris, France.), AS(Astronomy Department, Cornell University, Ithaca, NY 14853-6801 .), AT(Astronomy Department, Cornell University, Ithaca, NY 14853-6801 .), AU(Astronomy Department, Cornell University, Ithaca, NY 14853-6801 .), AV(Astronomy Department, Cornell University, Ithaca, NY 14853-6801 .), AW(Astronomy Department, Cornell University, Ithaca, NY 14853-6801 .), AX(Astronomy Department, Cornell University, Ithaca, NY 14853-6801 .), AY(Astronomy Department, Cornell University, Ithaca, NY 14853-6801 .), AZ(Astronomy Department, Cornell University, Ithaca, NY 14853-6801 .), BA(Astronomy Department, Cornell University, Ithaca, NY 14853-6801 .), BB(Spitzer Science Center, California Institute of Technology, MC 220-6, Pasadena, CA 91125.), BC(Spitzer Science Center, California Institute of Technology, MC 220-6, Pasadena, CA 91125.), BD(Spitzer Science Center, California Institute of Technology, MC 220-6, Pasadena, CA 91125.), BE(Spitzer Science Center, California Institute of Technology, MC 220-6, Pasadena, CA 91125.), BF(Spitzer Science Center, California Institute of Technology, MC 220-6, Pasadena, CA 91125.), BG(Spitzer Science Center, California Institute of Technology, MC 220-6, Pasadena, CA 91125.), BH(Spitzer Science Center, California Institute of Technology, MC 220-6, Pasadena, CA 91125.; NASA Herschel Science Center, IPAC/Caltech, MC 100-22, Pasadena, CA 91125.), BI(Spitzer Science Center, California Institute of Technology, MC 220-6, Pasadena, CA 91125.)
Publication:
The Astrophysical Journal Supplement Series, Volume 154, Issue 1, pp. 18-24. (ApJS Homepage)
Publication Date:
09/2004
Origin:
UCP
ApJ Keywords:
Infrared: General, Instrumentation: Spectrographs, Space Vehicles: Instruments
DOI:
10.1086/423134
Bibliographic Code:
2004ApJS..154...18H

Abstract

The Infrared Spectrograph (IRS) is one of three science instruments on the Spitzer Space Telescope. The IRS comprises four separate spectrograph modules covering the wavelength range from 5.3 to 38 μm with spectral resolutions, R=λ/Δλ~90 and 600, and it was optimized to take full advantage of the very low background in the space environment. The IRS is performing at or better than the prelaunch predictions. An autonomous target acquisition capability enables the IRS to locate the mid-infrared centroid of a source, providing the information so that the spacecraft can accurately offset that centroid to a selected slit. This feature is particularly useful when taking spectra of sources with poorly known coordinates. An automated data-reduction pipeline has been developed at the Spitzer Science Center.

The IRS was a collaborative venture between Cornell University and Ball Aerospace Corporation funded by NASA through the Jet Propulsion Laboratory and the Ames Research Center.

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