The Huntsman Telescope

Lee R. Spitler, Fergus D. Longbottom, Jaime A. Alvarado-Montes, Amir E. Bazkiaei, Sarah E. Caddy, Wilfred T. Gee, Anthony Horton, Steven Lee, Daniel J. Prole

Research output: Chapter in Book/Report/Conference proceedingConference proceeding contribution


The Huntsman Telescope, located at Siding Spring Observatory in Australia, is a system of ten telephoto Canon lenses designed for low surface brightness imaging in the Southern sky. Based upon the Dragonfly Telephoto Array, the refractive lens-based system provides an obstruction free optical path, which reduces the number of scattering surfaces and allows easier access to lower surface brightness levels.
In this proceeding, we present an analysis of the impact of flat fielding uncertainty on the limiting low surface brightness levels. We show that a fairly standard set of flat-field data can be well-characterised to a ∼0.1% level. This corresponds to a 5-σ lower limit of ∼33 magnitude per arcsecond2, which means that flat fielding is not likely going to set Huntsman's low surface brightness limit.
We also present early results of an exoplanet transient mode for Huntsman where all lenses work together to detect subtle variations in the luminosity of relatively bright V=8−12 magnitude stars. High-precision exoplanet imaging is ultimately limited by systematic uncertainties, so we anticipate multiple lenses will help to mitigate issues related to pixel-to-pixel and intra-pixel sensitivity variations. Our initial results show we can easily get ∼0.4% photometric precision with a single, defocused lens.
Original languageEnglish
Title of host publicationThe Realm of the Low Surface Brightness Universe
Subtitle of host publicationConference proceeding for the IAU Symposium 355
PublisherCambridge University Press (CUP)
Number of pages7
Publication statusSubmitted - Nov 2019


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