Towards controlled Fizeau observations with the Large Binocular Telescope

Eckhart Spalding; Phil Hinz; Steve Ertel; Erin Maier; Jordan Stone

doi:10.1117/12.2315498

9 July 2018 Towards controlled Fizeau observations with the Large Binocular Telescope

Eckhart Spalding, Phil Hinz, Steve Ertel, Erin Maier, Jordan Stone

Proceedings Volume 10701, Optical and Infrared Interferometry and Imaging VI; 107010J (2018) https://doi.org/10.1117/12.2315498
Event: SPIE Astronomical Telescopes + Instrumentation, 2018, Austin, Texas, United States

Abstract

The Large Binocular Telescope Interferometer (LBTI) can perform Fizeau interferometry in the focal plane, which accesses spatial information out to the LBT's full 22.7-m edge-to-edge baseline. This mode has previously been used to obtain science data, but has been limited to observations where the optical path difference (OPD) between the two beams is not controlled, resulting in unstable fringes on the science detectors. To maximize the science return, we are endeavoring to stabilize the OPD and tip-tilt variations and make the LBTI Fizeau mode optimized and routine. Here we outline the optical configuration of LBTI's Fizeau mode and our strategy for commissioning this observing mode.

Citation Download Citation

Eckhart Spalding, Phil Hinz, Steve Ertel, Erin Maier, and Jordan Stone "Towards controlled Fizeau observations with the Large Binocular Telescope", Proc. SPIE 10701, Optical and Infrared Interferometry and Imaging VI, 107010J (9 July 2018); https://doi.org/10.1117/12.2315498

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