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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 (Tae-Soo Pyo, Sherry Yeh, Nagayoshi Ohashi) by email : sseminar_at_subaru.naoj.org (please change"_at" to @).

August 11, Tuesday, 11:00 am in 104

" Astrophysics in the millisecond time domain: capabilities and selected results from Thailand and the ESO VLT "

Andrea Richichi

(National Astronomical Research Institute of Thailand)


I will present the rapid scientific and technological expansion taking place at the National Astronomical Research Institute of Thailand, the leading institution for astronomy in South-East Asia. The NARIT science group includes scientists with a broad range of interests spanning from solar system objects, to exoplanets, to stellar physics and cosmology. Alongside with several 50 to 70-cm class telescopes, some of which are fully robotic, the flagship facility is the Thai National 2.4-m Telescope (TNT), equipped with spectrographs and imaging cameras. I will illustrate its characteristics and opportunities for telescope access and collaboration. I will then discuss in particular ULTRASPEC, a visitor instrument built by a Consortium of UK institutes, based on a low-noise, frame-transfer EMCCD with high-quality optics and high-time resolution capabilities: a niche for which no other observatory is similarly equipped in the longitude range of TNT. By using a highly flexible scheme of subarray reading, continuous sampling rates as fast as 4ms can be achieved. I provide examples of new exciting results in areas such as eclipsing binaries, cataclysmic variables, flickering, exoplanet transits, and occultations by the Moon and other solar system bodies. My work in high time resolution at TNT follows in the footsteps of a vast effort carried out over many years with millisecond-resolution in the NIR: I will provide an overview of >1,000 lunar occultations observed from the ESO VLT.


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



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