M. G. Löfdahl
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View article: torchmfbd: A flexible multi-object, multi-frame blind deconvolution code
torchmfbd: A flexible multi-object, multi-frame blind deconvolution code Open
Context . Post-facto image restoration techniques are essential for improving the quality of ground-based astronomical observations, which are affected by atmospheric turbulence. Multi-object, multi-frame blind deconvolution (MOMFBD) metho…
View article: Investigating the absence of stellar CMEs through solar observations 
Investigating the absence of stellar CMEs through solar observations  Open
Coronal Mass Ejections (CMEs) remain a focal point of solar and stellar research due to their significant impact on space weather dynamics and exoplanet habitability. Unfortunately, it has so far proven difficult to measure these events on…
View article: The 85-electrode adaptive optics system of the Swedish 1-m Solar Telescope
The 85-electrode adaptive optics system of the Swedish 1-m Solar Telescope Open
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 was installed in 2013. The AO system is unusual in that it …
View article: The 85-electrode AO system of the Swedish 1-m Solar Telescope
The 85-electrode AO system of the Swedish 1-m Solar Telescope Open
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 was installed in 2013. The AO system is unusual by using a …
View article: A comparative study of two X2.2 and X9.3 solar flares observed with HARPS-N
A comparative study of two X2.2 and X9.3 solar flares observed with HARPS-N Open
Context. Stellar flares cannot be spatially resolved, which complicates ascertaining the physical processes behind particular spectral signatures. Due to their proximity to Earth, solar flares can serve as a stepping stone for understandin…
View article: A comparative study of two X2.2 and X9.3 solar flares observed with HARPS-N: Reconciling Sun-as-a-star spectroscopy and high-spatial resolution solar observations in the context of the solar-stellar connection
A comparative study of two X2.2 and X9.3 solar flares observed with HARPS-N: Reconciling Sun-as-a-star spectroscopy and high-spatial resolution solar observations in the context of the solar-stellar connection Open
Stellar flares cannot be spatially resolved, which complicates ascertaining the physical processes behind particular spectral signatures. Due to their proximity to Earth, solar flares can serve as a stepping stone for understanding their s…
View article: Multi-frame blind deconvolution and phase diversity with statistical inclusion of uncorrected high-order modes
Multi-frame blind deconvolution and phase diversity with statistical inclusion of uncorrected high-order modes Open
Context. Images collected with ground-based telescopes suffer blurring and distortions from turbulence in the Earth’s atmosphere. Adaptive optics (AO) can only partially compensate for these effects. Neither multi-frame blind deconvolution…
View article: The European Solar Telescope
The European Solar Telescope Open
The European Solar Telescope (EST) is a project aimed at studying the magnetic connectivity of the solar atmosphere, from the deep photosphere to the upper chromosphere. Its design combines the knowledge and expertise gathered by the Europ…
View article: Multi-frame blind deconvolution and phase diversity with statistical\n inclusion of uncorrected high-order modes
Multi-frame blind deconvolution and phase diversity with statistical\n inclusion of uncorrected high-order modes Open
Images collected with ground-based telescopes suffer blurring and distortions\nfrom turbulence in Earth's atmosphere. Adaptive optics (AO) can only partially\ncompensate for these effects. Neither multi-frame blind deconvolution (MFBD)\nno…
View article: SSTRED: Data- and metadata-processing pipeline for CHROMIS and CRISP
SSTRED: Data- and metadata-processing pipeline for CHROMIS and CRISP Open
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 instrumentation. Space-based solar telescopes provide science-read…
View article: A data-processing and metadata-generating pipeline for CHROMIS and CRISP
A data-processing and metadata-generating pipeline for CHROMIS and CRISP Open
We present a data pipeline for the newly installed SST/CHROMIS imaging spectrometer, as well as for the older SST/CRISP spectropolarimeter. The aim is to provide observers with a user-friendly data pipeline, that delivers science-ready dat…