Statistics – Computation
Scientific paper
Aug 2008
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008aspc..394..673g&link_type=abstract
Astronomical Data Analysis Software and Systems ASP Conference Series, Vol. 394, Proceedings of the conference held 23-26 Septem
Statistics
Computation
Scientific paper
The near-infrared multi-object spectrograph NIRSpec will be a major piece of the instrument suite of the future James Webb space telescope (JWST). In its multi-object spectroscopy mode, NIRSpec will allow the JWST users to obtain spectra in the 0.6 to 5.0μm range of more than one 100 objects over a 9 square arcminute field of view in a single exposure. As part of the NIRSpec project led by EADS/Astrium and funded by the European Space Agency (ESA), we are developing a complete model of the instrument taking into account both optical aberrations and diffraction effects (based on the Fourier optics formalism). One major challenge is to be able at the same time to describe accurately all the modes of this complex instrument over more than three octaves in wavelength and keep the software complexity, computation time and memory needs below reasonable limits. In this paper we will describe the model being used, insisting on the problems that have been encountered and the solutions that have been implemented.
Ferruit Pierre
Gnata Xavier
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