Application of Photoconductor Physical Transient Model to Fourier Transform Spectrometer Data ofAKARI/Far-Infrared Surveyor (FIS)

AKARIcarries on board the Fourier transform spectrometer (FTS) with the gallium-doped germanium (Ge:Ga) photoconductor arrays of the far-infrared surveyor (FIS). Ge:Ga photoconductors are the most sensitive detectors for far-infrared satellite instruments. However, the performance of these detectors...

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Bibliographic Details
Published in:Publications of the Astronomical Society of the Pacific 2009-05, Vol.121 (879), p.549-557
Main Authors: Kaneda, H., Fouks, B., Yasuda, A., Murakami, N., Okada, Y., Coulais, A., Doi, Y., Fujiwara, M., Kawada, M., Matsuo, H., Takahashi, H.
Format: Article
Language:eng ; jpn
Subjects:
Boundary conditions
Electric current
Electric fields
Emission spectra
Galactic Center
Parametric models
Photoconductive cells
Photons
Pixels
Transient response
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Summary:AKARIcarries on board the Fourier transform spectrometer (FTS) with the gallium-doped germanium (Ge:Ga) photoconductor arrays of the far-infrared surveyor (FIS). Ge:Ga photoconductors are the most sensitive detectors for far-infrared satellite instruments. However, the performance of these detectors is known to be severely influenced by undesirable slow transient behaviors under a low photon flux condition in space. In fact, we have found that the in-orbitAKARI/FTS data are heavily distorted by the transient response, which severely affects their spectroscopic accuracies. Therefore we have performed transient correction of in-orbit FTS data by using our physical transient model with numerical calculation, by which we have found that the distortion is improved significantly. We have demonstrated the applicability of the physical transient model to FTS data by using the observational data of the Galactic center region.
ISSN:0004-6280
1538-3873
DOI:10.1086/599818