2011
DOI: 10.1051/0004-6361/201116904
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Application of speckle and (multi-object) multi-frame blind deconvolution techniques on imaging and imaging spectropolarimetric data

Abstract: Context. Ground-based imaging and imaging spectropolarimetric data are often subjected to post-facto reconstruction techniques to improve the spatial resolution. Aims. We test the effects of reconstruction techniques on two-dimensional data to determine the best approach to improve our data. Methods. We obtained an 1-h time-series of spectropolarimetric data in the Fe i line at 630.25 nm with the Göttingen Fabry-Pérot Interferometer (FPI) that are accompanied by imaging data in the blue continuum at 431.3 nm a… Show more

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Cited by 23 publications
(28 citation statements)
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“…Furthermore, this noise introduces artifacts that perturb the appearance of the Stokes profiles. This effect is also discussed by Puschmann & Beck (2011), who use different deconvolution methods.…”
Section: Degradation and Phase-diversity Reconstructionmentioning
confidence: 84%
“…Furthermore, this noise introduces artifacts that perturb the appearance of the Stokes profiles. This effect is also discussed by Puschmann & Beck (2011), who use different deconvolution methods.…”
Section: Degradation and Phase-diversity Reconstructionmentioning
confidence: 84%
“…Puschmann et al 2007) and the Ca imaging data for a filter with a FWHM of 1 nm, while the Fe i line-core image shows a background pattern of inverse granulation again. The bright features in the 1-nm Ca filter image are significantly smaller than in the line-core image of the photospheric line and show no intensity enhancements in their surroundings, while both images have a similar spatial resolution (Puschmann & Beck 2011).…”
Section: Disc Centre Observationsmentioning
confidence: 92%
“…We also used two Ca ii H images at similar locations from the Hinode Solar Optical Telescope (Kosugi et al 2007;Tsuneta et al 2008). They were taken (Puschmann & Sailer 2006), can be found in Puschmann & Beck (2011). To simulate the Hinode Ca imaging data, we multiplied all spectrally resolved observed line profiles with Gaussians of FWHM = 0.22 nm (Carlsson et al 2007) and 0.3 nm (Tsuneta et al 2008), respectively (cf.…”
Section: Observations and Creation Of Synthetic Ca Imagesmentioning
confidence: 99%
“…A data pipeline is nearly finished (see Puschmann et al 2012b), which includes both speckle and blind deconvolution reconstruction methods. A comparison of different methods, their application, and their results is given by Puschmann & Beck (2011).…”
Section: Optical Designmentioning
confidence: 99%
“…With respect to the spectral resolution, we found a significant deviation between the theoretical (R = 250 000) and effective spectral resolution (R = 100 000) using the method described by Allende Prieto et al (2004) andCabrera Solana et al (2007) that estimates the latter by a comparison to a reference profile. At the VTT, Puschmann & Beck (2011) still obtained a spectral resolution of R ≈ 160 000 using the same method. However, the pupil image was smaller at the VTT (∼40 mm) than at the GREGOR telescope (∼60 mm).…”
Section: Dual Etalon Systemmentioning
confidence: 99%