Astronomy & Astrophysics

All Figures

$\begin{figure} \par\includegraphics[width=16.7cm,clip]{h4462f1.eps} \end{figure}$ Figure 1: The largest sunspot of AR10030 in the 488-nm image. The large box indicates the field-of-view of the PD-restored G-band image. The smaller boxes represent example subfields that are used for quantitative analysis. A-G: penumbra, K-M: quiet granulation, X-Z: active granulation. See also Fig. 2 and Table 2.
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In the text

$\begin{figure} \par\includegraphics[angle=-90,width=16.4cm,clip]{h4462f2.eps} \end{figure}$ Figure 2: The penumbral and active granulation subfields indicated in Fig. 1, but from the PD-restored G-band image and individually scaled for best contrast. Tick marks have 1 $^{\prime \prime }$ spacing.
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In the text

$\begin{figure} \par\includegraphics[width=16.4cm,clip]{h4462f3.eps} \end{figure}$ Figure 3: Part of the penumbra in three wavelength bands. a) 488 nm, b) G-cont, c, d) G-band. a), b) and c) are MTF-deconvolved. d) is PD-restored.
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In the text

$\begin{figure} \par\mbox{ \includegraphics[angle=-90,width=8.3cm,clip]{h4462f4a.... ...{1cm} \includegraphics[angle=-90,width=8.3cm,clip]{h4462f4b.eps} } \end{figure}$ Figure 4: Penumbral intensity tracings from a PD-restored G-band image. D shows the theoretical diffraction-limited point-spread function of the telescope as a cut through an Airy function with a FWHM of 0 $.\!\!^{\prime\prime}$ 092, the diameter of the first dark ring being 0 $.\!\!^{\prime\prime}$ 113. R illustrates the Rayleigh criterion for resolution. There are apparently many unresolved peaks and dips in the curves.
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In the text

$\begin{figure} \par\includegraphics[angle=-90,width=8.2cm,clip,clip]{h4462f5.eps} \end{figure}$ Figure 5: Sample long filaments from PD-restored G-band images.
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In the text

$\begin{figure} \par\includegraphics[angle=-90,width=8.2cm,clip]{h4462f6.eps} \end{figure}$ Figure 6: Sample penumbral grains from PD-restored G-band images.
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In the text

$\begin{figure} \par\subfigure[]{\includegraphics[width=2.7cm,clip]{h4462f7a.eps}... ...m} \subfigure[]{\includegraphics[width=2.5cm,clip]{h4462f7b.eps} } \end{figure}$ Figure 7: a) PD-restored G-band image of penumbral subfield C. b) 2D power spectrum. The highlighted 30 $^\circ$ sector is in the direction of maximal power and is used for calculating the 1D spectrum.
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In the text

$\begin{figure} \par\includegraphics[angle=-90,width=8.7cm,clip]{h4462f8.eps} \end{figure}$ Figure 8: Power spectra of the penumbral subfield C from Fig. 7. The deconvolution has been made without noise suppression. The axes are lin-log. $\nu _0$ is the diffraction limit at 430 nm (G-band).
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In the text

$\begin{figure} \par\includegraphics[angle=-90,width=8.7cm,clip]{h4462f9.eps}\end{figure}$ Figure 9: Log-log plots of noise-corrected G-band power spectra. Each dot represents data for one of several partly overlapping penumbral subfields selected from four of our best PD-restored frames (see e.g., A-G in Fig. 2). The solid line represents the running mean for all the subfields. The long-dashed curve is calculated in the same way from the active granulation subfields (e.g., X-Z). In total, 20 granular and 80 penumbral subfields were included. The DOT curve was computed from the noise-filtered data of S01. The shortest-dashed curve represents a fit to the results of SAB98 - its position along the vertical axis is arbitrary. $\nu _0$ is the diffraction limit at 430 nm (G-band).
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In the text

$\begin{figure} \includegraphics[width=16cm,clip]{h4462f10.eps} \end{figure}$ Figure 10: PD MTFs. a) One of the four MTFs estimated with PD corresponding to the subfield in Fig. 7a (circle indicates diffraction limit). b) Squared sector averaged MTFs for the four focused images in the PD data used to make the image in Fig. 7a. Diffraction-limited MTF² plotted as a reference. The spatial frequency coordinate is normalized to the diffraction-limited frequency at 430 nm.
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In the text

$\begin{figure} \par\includegraphics[angle=-90,width=8.8cm,clip]{h4462f11.eps} \end{figure}$ Figure 11: Squared simulated MTFs corresponding to the tail of uncorrected modes for different seeing conditions. Diffraction-limited MTF² plotted as a reference. Also, the MTF² of the KAF1600 CCD detector is plotted. $\nu _0$ is the diffraction limit at 430 nm (G-band).
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In the text

$\begin{figure} \par\includegraphics[angle=-90,width=8.5cm,clip]{h4462f12.eps} \end{figure}$ Figure 12: Power spectra corrections for PD reconstructed data: squared ratio of the diffraction-limited MTF to the combined MTF of the detector and uncorrected high-order atmospheric modes. $\nu _0$ is the diffraction limit at 430 nm (G-band).
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In the text

$\begin{figure} \par\includegraphics[angle=-90,width=8.7cm,clip]{h4462f13.eps} \end{figure}$ Figure 13: Mean power at 488 nm for 47 penumbral, 12 active-granulation, and 6 quiet-granulation subfields from 3 frames. $\nu _0$ is the diffraction limit at 430 nm (G-band).
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In the text

$\begin{figure} \par\includegraphics[width=16.7cm,clip]{h4462f1.eps} \end{figure}$	Figure 1: The largest sunspot of AR10030 in the 488-nm image. The large box indicates the field-of-view of the PD-restored G-band image. The smaller boxes represent example subfields that are used for quantitative analysis. A-G: penumbra, K-M: quiet granulation, X-Z: active granulation. See also Fig. 2 and Table 2.
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$\begin{figure} \par\includegraphics[angle=-90,width=16.4cm,clip]{h4462f2.eps} \end{figure}$	Figure 2: The penumbral and active granulation subfields indicated in Fig. 1, but from the PD-restored G-band image and individually scaled for best contrast. Tick marks have 1 $^{\prime \prime }$ spacing.
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$\begin{figure} \par\includegraphics[width=16.4cm,clip]{h4462f3.eps} \end{figure}$	Figure 3: Part of the penumbra in three wavelength bands. a) 488 nm, b) G-cont, c, d) G-band. a), b) and c) are MTF-deconvolved. d) is PD-restored.
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$\begin{figure} \par\includegraphics[angle=-90,width=8.2cm,clip,clip]{h4462f5.eps} \end{figure}$	Figure 5: Sample long filaments from PD-restored G-band images.
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$\begin{figure} \par\includegraphics[angle=-90,width=8.2cm,clip]{h4462f6.eps} \end{figure}$	Figure 6: Sample penumbral grains from PD-restored G-band images.
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$\begin{figure} \par\subfigure[]{\includegraphics[width=2.7cm,clip]{h4462f7a.eps}... ...m} \subfigure[]{\includegraphics[width=2.5cm,clip]{h4462f7b.eps} } \end{figure}$	Figure 7: a) PD-restored G-band image of penumbral subfield C. b) 2D power spectrum. The highlighted 30 $^\circ$ sector is in the direction of maximal power and is used for calculating the 1D spectrum.
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$\begin{figure} \par\includegraphics[angle=-90,width=8.7cm,clip]{h4462f8.eps} \end{figure}$	Figure 8: Power spectra of the penumbral subfield C from Fig. 7. The deconvolution has been made without noise suppression. The axes are lin-log. $\nu _0$ is the diffraction limit at 430 nm (G-band).
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$\begin{figure} \includegraphics[width=16cm,clip]{h4462f10.eps} \end{figure}$	Figure 10: PD MTFs. a) One of the four MTFs estimated with PD corresponding to the subfield in Fig. 7a (circle indicates diffraction limit). b) Squared sector averaged MTFs for the four focused images in the PD data used to make the image in Fig. 7a. Diffraction-limited MTF² plotted as a reference. The spatial frequency coordinate is normalized to the diffraction-limited frequency at 430 nm.
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$\begin{figure} \par\includegraphics[angle=-90,width=8.8cm,clip]{h4462f11.eps} \end{figure}$	Figure 11: Squared simulated MTFs corresponding to the tail of uncorrected modes for different seeing conditions. Diffraction-limited MTF² plotted as a reference. Also, the MTF² of the KAF1600 CCD detector is plotted. $\nu _0$ is the diffraction limit at 430 nm (G-band).
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$\begin{figure} \par\includegraphics[angle=-90,width=8.5cm,clip]{h4462f12.eps} \end{figure}$	Figure 12: Power spectra corrections for PD reconstructed data: squared ratio of the diffraction-limited MTF to the combined MTF of the detector and uncorrected high-order atmospheric modes. $\nu _0$ is the diffraction limit at 430 nm (G-band).
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$\begin{figure} \par\includegraphics[angle=-90,width=8.7cm,clip]{h4462f13.eps} \end{figure}$	Figure 13: Mean power at 488 nm for 47 penumbral, 12 active-granulation, and 6 quiet-granulation subfields from 3 frames. $\nu _0$ is the diffraction limit at 430 nm (G-band).
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