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The Subaru Seminar is usually held in Room 104 of the Hilo Base Facility, adjacent to the main lobby. Everyone is welcome to attend. If you are interested in giving a seminar, please contact Subaru seminar organizers (Tadayuki Kodama, Kumiko S. Usuda, Naoyuki Tamura, Tomonori Usuda) by email : (please change"_at_" to @).

September 12, Monday, at 11:00 am

" LO in LT: Lunar Occultations in Large Telescopes "

Octavi Fors

(Universit of Barcelona)

Lunar occultations (LO), the simplest and cheapest high angular resolution technique, has largely extended its potential science cases thanks to that NIR arrays at 8m class telescopes can now image at a few milliseconds rate.

Since Mar 2006 these kind of observations are being regularly conducted at VLT/ISAAC, achieving a limiting angular resolution of less than 1 mas and a limiting magnitude of K=12.5 mag, which constitutes a unique combination among other techniques.

I will overview the basics behind the LO technique. I will also present the LO runs conducted at the VLT/ISAAC so far and summarize their performance. Some representative results will be shown, in fields such as detection of very close and faint binaries components, direct meaurements of stellar diameters, detection of sources with extended emission (circumstellar shells, YSOs, masers, etc.), and interferometric calibrators database feed, etc.

Seminars are also held at JAC, CFHT, and IfA.

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