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IRAC: Spectral Response |
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The IRAC system throughput and optical performance is governed by a
combination of the system components, including the lenses, beamsplitters,
filters, mirrors, and detectors. The system parameters are summarized in
the SOM. The system response is based on measurements of the final
in-flight system, including the beamsplitter, filter, ZnS & ZnSe
coating transmissions, mirror reflectance, BaF2 and MgF2 coating
transmissions, and detector quantum efficiency. At each wavelength, the spectral response curve gives the number of electrons produced in the detector per incoming photon.
The spectral response curves for each IRAC band are here: IRAC Band 1 Spectral Response table IRAC Band 2 Spectral Response table IRAC Band 3 Spectral Response table IRAC Band 4 Spectral Response table In each table, the first column gives the wavelength in microns. The second column gives the spectral response for unpolarized light. The third and fourth columns give the spectral response curves separately for two orthogonal polarizations.
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help@spitzer.caltech.edu http://ssc.spitzer.caltech.edu/irac/spectral_response.html
