A seeing measurement device for the PoET solar telescope
Bachar Wehbe, Andr\'e Silva, Manuel Abreu, Alexandre Cabral, Nuno Santos, Pit S\"utterlin

TL;DR
This paper introduces a dedicated solar seeing monitor designed for daytime atmospheric characterization at Paranal, supporting the PoET solar telescope's observational needs.
Contribution
The paper details the design, implementation, and initial validation of a new solar seeing measurement device for daytime use at Paranal Observatory.
Findings
Successfully commissioned and validated the seeing monitor on-sky.
Provides accurate daytime atmospheric seeing measurements for the PoET instrument.
Enhances the ability to select optimal observing conditions for solar observations.
Abstract
Atmospheric seeing arises from stochastic fluctuations in the refractive index of the Earth's atmosphere, producing random variations in the apparent direction of incoming light from astronomical sources. Scintillation refers to the associated intensity fluctuations induced by these refractive index inhomogeneities. A quantitative relationship between seeing and scintillation was established in 1993, enabling daytime seeing measurements by exploiting the Sun as an extended, bright source and using non-telescopic instrumentation. PoET, the Paranal solar ESPRESSO Telescope, will feed the Echelle SPectrograph for Rocky Exoplanets and Stable Spectroscopic Observations, ESPRESSO, at the European Southern Observatory (ESO) Very Large Telescope (VLT). By using the Sun as a proxy for solar-type stars, PoET will facilitate detailed investigations of the physical processes that drive stellar…
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