Computer Science – Performance
Scientific paper
Feb 2003
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003spie.4860..138d&link_type=abstract
High-Contrast Imaging for Exo-Planet Detection. Edited by Alfred B. Schultz. Proceedings of the SPIE, Volume 4860, pp. 138-148
Computer Science
Performance
1
Scientific paper
Gaussian aperture pupil masks can in theory achieve the contrast requisite for directly imaging an extrasolar planet. We outline the process of fabricating and testing a GAPM for use on the Penn State near-IR Imager and Spectrograph (PIRIS) at the Mt. Wilson 100" telescope. We find that the initial prototype observations are quite successful, achieving a contrast similar to a traditional Lyot coronagraph without blocking any light from a central object and useful for finding faint companions to nearby young solar analogues. In the lab we can reproduce the expected PSF to within an order of magnitude and with new designs achieve ~5×10-5 contrast at 10λ/D. We find that small inaccuracies in the mask fabrication process and insufficient correction of the atmosphere contribut ehe most degradation to contrast. Finally we compare the performance of GAPMs and Lyot coronagrphs of similar throughput.
Debes John H.
Ge Jian
Mandelowitz Caylin
Watson Anne
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