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9 August 2016 A comprehensive radial velocity error budget for next generation Doppler spectrometers
Samuel Halverson, Ryan Terrien, Suvrath Mahadevan, Arpita Roy, Chad Bender, Gudmundur Kári Stefánsson, Andrew Monson, Eric Levi, Fred Hearty, Cullen Blake, Michael McElwain, Christian Schwab, Lawrence Ramsey, Jason Wright, Sharon Wang, Qian Gong, Paul Roberston
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Proceedings Volume 9908, Ground-based and Airborne Instrumentation for Astronomy VI; 99086P (2016) https://doi.org/10.1117/12.2232761
Event: SPIE Astronomical Telescopes + Instrumentation, 2016, Edinburgh, United Kingdom
Abstract
We describe a detailed radial velocity error budget for the NASA-NSF Extreme Precision Doppler Spectrometer instrument concept NEID (NN-explore Exoplanet Investigations with Doppler spectroscopy). Such an instrument performance budget is a necessity for both identifying the variety of noise sources currently limiting Doppler measurements, and estimating the achievable performance of next generation exoplanet hunting Doppler spectrometers. For these instruments, no single source of instrumental error is expected to set the overall measurement floor. Rather, the overall instrumental measurement precision is set by the contribution of many individual error sources. We use a combination of numerical simulations, educated estimates based on published materials, extrapolations of physical models, results from laboratory measurements of spectroscopic subsystems, and informed upper limits for a variety of error sources to identify likely sources of systematic error and construct our global instrument performance error budget. While natively focused on the performance of the NEID instrument, this modular performance budget is immediately adaptable to a number of current and future instruments. Such an approach is an important step in charting a path towards improving Doppler measurement precisions to the levels necessary for discovering Earth-like planets.
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Samuel Halverson, Samuel Halverson, Ryan Terrien, Ryan Terrien, Suvrath Mahadevan, Suvrath Mahadevan, Arpita Roy, Arpita Roy, Chad Bender, Chad Bender, Gudmundur Kári Stefánsson, Gudmundur Kári Stefánsson, Andrew Monson, Andrew Monson, Eric Levi, Eric Levi, Fred Hearty, Fred Hearty, Cullen Blake, Cullen Blake, Michael McElwain, Michael McElwain, Christian Schwab, Christian Schwab, Lawrence Ramsey, Lawrence Ramsey, Jason Wright, Jason Wright, Sharon Wang, Sharon Wang, Qian Gong, Qian Gong, Paul Roberston, Paul Roberston, "A comprehensive radial velocity error budget for next generation Doppler spectrometers", Proc. SPIE 9908, Ground-based and Airborne Instrumentation for Astronomy VI, 99086P (9 August 2016); doi: 10.1117/12.2232761; https://doi.org/10.1117/12.2232761
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