Pupil-segmented photometry for lunar occultation observation

Naruhisa Takato

doi:10.1117/12.459998

7 March 2003 Pupil-segmented photometry for lunar occultation observation

Naruhisa Takato

Proceedings Volume 4841, Instrument Design and Performance for Optical/Infrared Ground-based Telescopes; (2003) https://doi.org/10.1117/12.459998
Event: Astronomical Telescopes and Instrumentation, 2002, Waikoloa, Hawai'i, United States

Abstract

Occultation is potentially a powerful tool for high-resolution astronomy. It can reach about a few milli-arcsec (mas) by lunar occultation observation and 0.1 mas by that of main-belt asteroids. Photon noise limits the resolution. If we use large telescope in order to increase the number of photons received by a telescope, the fringe pattern that is projected on the earth is averaged over the pupil and the visibility will decrease. I propose to use pupil-segmented method and its performance for lunar occultation. The optimum subaperture size is 2-4 m for lunar occultation. This method is effective for large (> 8-10m) telescope. We can resolve in 6 mas for 16 mag star in > 3 σ noise level using 8 m telescope.

Citation Download Citation

Naruhisa Takato "Pupil-segmented photometry for lunar occultation observation", Proc. SPIE 4841, Instrument Design and Performance for Optical/Infrared Ground-based Telescopes, (7 March 2003); https://doi.org/10.1117/12.459998

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