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High-Time-Resolution Astrophysics using the Thai 2.4-m Telescope with Ultraspec

Published online by Cambridge University Press:  29 August 2019

P. Irawati
P. Irawati*
Affiliation:
National Astronomical Research Institute of Thailand, Chiang Mai, Thailand email: [email protected]
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Abstract

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The Thai National Observatory (TNO) is equipped with a 2.4-m Ritchey-Chretien telescope and the high-speed versatile Ultraspec camera. The instrument employs a low-noise frame-transfer EMCCD, suitable for the observation of faint objects and for high-time-resolution astrophysics. We present some of the results obtained in the first four years of operation, focusing particularly on fast photometry of lunar and stellar occultations, and follow-up efforts on a few white-dwarf binaries. Among the latter is the polar cataclysmic variable UZ For. This system displays period changes and is suspected of hosting circumbinary planets. Our high-speed photometry data show a decreasing trend in the O–C diagram of UZ For. Using our new data set, we will investigate whether the period change in this binary is due to a possible third body, or to other mechanism(s).

Keywords

Techniques: photometricStars: white dwarfsStars: cataclysmic variables
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 14 , Symposium S339: Southern Horizons in Time-Domain Astronomy , November 2017 , pp. 185 - 188
Copyright
© International Astronomical Union 2019 

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