MMTF: The Maryland-Magellan Tunable Filter
S. Veilleux, B. J. Weiner, D. S. N. Rupke, M. McDonald, C. Birk, J., Bland-Hawthorn, A. Dressler, T. Hare, D. Osip, C. Pietraszewski, and S. N., Vogel

TL;DR
The paper introduces the Maryland-Magellan Tunable Filter (MMTF), a versatile instrument on the Magellan telescope that offers adjustable wavelength filtering for detailed astronomical imaging and spectroscopy.
Contribution
It provides a comprehensive description of MMTF's hardware, software, and observing techniques, highlighting its capabilities and lessons learned from three years of use.
Findings
Achieved ~0.5" image quality over a 27' field of view
Demonstrated versatile use in various astronomical projects
Provided detailed data reduction techniques for tunable filter observations
Abstract
This paper describes the Maryland-Magellan Tunable Filter (MMTF) on the Magellan-Baade 6.5-meter telescope. MMTF is based on a 150-mm clear aperture Fabry-Perot (FP) etalon that operates in low orders and provides transmission bandpass and central wavelength adjustable from ~5 to ~15 A and from ~5000 to over ~9200 A, respectively. It is installed in the Inamori Magellan Areal Camera and Spectrograph (IMACS) and delivers an image quality of ~0.5" over a field of view of 27' in diameter (monochromatic over ~10'). This versatile and easy-to-operate instrument has been used over the past three years for a wide variety of projects. This paper first reviews the basic principles of FP tunable filters, then provides a detailed description of the hardware and software associated with MMTF and the techniques developed to observe with this instrument and reduce the data. The main lessons learned…
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