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The 85-electrode AO system of the Swedish 1-m Solar Telescope
G. B. Scharmer, G. Sliepen, J. -C. Sinquin +3
We discuss the chosen concepts, detailed design, implementation and calibration of the 85-electrode adaptive optics (AO) system of the Swedish 1-meter Solar Telescope (SST), which…
Design and Performance Analysis of a Highly Efficient Polychromatic Full-Stokes Polarization Modulator for the CRISP Imaging Spectrometer
A. G. de Wijn, J. de la Cruz Rodríguez, G. B. Scharmer +2
We present the design and performance of a polychromatic polarization modulator for the CRisp Imaging SpectroPolarimeter (CRISP) Fabry-Perot tunable narrow-band imaging spectropola…
Is the sky the limit? Performance of the revamped Swedish 1-m Solar Telescope and its blue- and red-beam re-imaging systems
Goran Scharmer, Mats Lofdahl, Guus Sliepen +1
We demonstrate that for data recorded with a solar telescope that uses adaptive optics and/or post-processing to compensate for many low- and high-order aberrations, the RMS granul…
SSTRED: Data- and metadata-processing pipeline for CHROMIS and CRISP
M. G. Löfdahl, T. Hillberg, J. de la Cruz Rodriguez +5
Context: Data from ground-based, high-resolution solar telescopes can only be used for science with calibrations and processing, which requires detailed knowledge about the instrum…
Sources of straylight in the post-focus imaging instrumentation of the Swedish 1-m Solar Telescope
M. G. Löfdahl, G. B. Scharmer
Recently measured straylight PSFs in Hinode/SOT make granulation contrast in observed data and synthetic MHD data consistent. Data from earthbound telescopes also need accurate cor…
High-order aberration compensation with Multi-frame Blind Deconvolution and Phase Diversity image restoration techniques
G. B. Scharmer, M. G. Löfdahl, T. I. M. van Werkhoven +1
Context. For accurately measuring intensities and determining magnetic field strengths of small-scale solar (magnetic) structure, knowledge of and compensation for the point spread…
S-DIMM+ height characterization of day-time seeing using solar granulation
G. B. Scharmer, T. I. M. van Werkhoven
To evaluate site quality and to develop multi-conjugative adaptive optics systems for future large solar telescopes, characterization of contributions to seeing from heights up to…