DMCA
Simulated Dispersed Fringes Of An Astrometric Space Interferometry Mission (815)
BibTeX
@MISC{Scholz815simulateddispersed,
author = {R. -d. Scholz and U. Bastian},
title = {Simulated Dispersed Fringes Of An Astrometric Space Interferometry Mission},
year = {815}
}
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Abstract
Several astrometric space interferometry mission projects (e.g. GAIA, FAME, DIVA) for scanning the sky in a similar fashion as Hipparcos are currently being discussed. Their raw detector signals will be dispersed interferometer fringes. This new type of signal will be directly recorded by CCD mosaics in drift-scan mode in the focal plane of Fizeau interferometers. The astrometric measurement, i.e. the determination of the one-dimensional relative position of the fringe pattern, perpendicular to the fringes (i.e. in the direction of the sky scan), and the extraction of the spectro-photometric information contained in the direction of the dispersion of the fringes (i.e. perpendicular to the sky scan) need a complex reduction technique. We report on the simulation of polychromatic dispersed fringe patterns of stars with different spectra taken from spectrophotometric libraries using the presently envisaged parameters of the DIVA instrument. The stellar signal was combined with expected da...
Keyphrases
astrometric space interferometry mission sky scan spectro-photometric information astrometric measurement diva instrument fizeau interferometer polychromatic dispersed fringe pattern stellar signal interferometer fringe envisaged parameter similar fashion fringe pattern complex reduction technique one-dimensional relative position spectrophotometric library focal plane different spectrum new type ccd mosaic drift-scan mode raw detector signal
