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Up: Comparison of 87 GHz

6 Figures 2-31 and tables 3-11


 

 
Table 3: April 12, 1996: The radio Quiet Sun Level (QSL) was 7240.0 A/D converter count units (1.000 $\pm $ 0.003) in the Metsähovi 87 GHz map at 13:57 - 14:05 UT (Fig. 2). The radio source location is within the one arcmin beam. The Yohkoh SXT map was taken at 13:54:59 UT (Fig. 3), and the SOHO EIT Fe IX/X image at 14:27:41 UT (Fig. 4)
Point Lat Long 87 GHz Radio EIT SXT
  Deg Deg Relative structure structure structure
      Intensity   within 1 arcmin within 1 arcmin
1N 51.1 20.4 1.009 $\pm $ 0.003 brightening LIE enhanced brightness
2N 43.4 5.1 1.010 $\pm $ 0.003 brightening LID enhanced brightness
3N 56.8 9.4 1.006 $\pm $ 0.003 brightening LID (He II: near LIE) near BP
4N 31.3 -5.5 1.004 $\pm $ 0.003 brightening LID BP
1S -67.0 5.0 1.017 $\pm $ 0.003 brightening CH (He II: BP) CH
2S -55.8 35.0 1.012 $\pm $ 0.003 brightening LID/BP nearby BP
3S -58.2 -41.2 1.010 $\pm $ 0.003 brightening LID/BP nearby enhanced brightness/CH
4S -61.9 26.9 1.011 $\pm $ 0.003 brightening LID/LIE nearby enhanced brightness
5S -47.3 -56.0 1.010 $\pm $ 0.003 brightening LIE CH/enhanced brightness



  \begin{figure} \par\resizebox{12cm}{!}{\includegraphics{ds1721f2.eps}}\end{figure} Figure 2: Solar radio map at 87 GHz (3.5 mm) for April 12, 1996 at 13:57 - 14:05 UT. The greyscale contours (0.5, 0.7, 0.9, 0.98, 0.985, 0.99, and 0.995) represent levels below the quiet Sun. The quiet Sun (level 1.000) is plotted in white color, over which are the enhanced levels plotted in contour lines. The contour line level difference (0.3% of the quiet Sun in this case) is also the flux resolution


  \begin{figure}\par\resizebox{16cm}{!}{\includegraphics{ds1721f3.ps}}\par\end{figure} Figure 3: Yohkoh SXT Al.1 image from April 12, 1996 at 13:54:59 UT (reversed colors). Overplotted are some selected radio contours (above the quiet Sun level only) of the 13:57 - 14:05 UT map


  \begin{figure}\par\resizebox{18cm}{!}{\includegraphics{ds1721f4.ps}}\par\end{figure} Figure 4: SOHO/EIT Fe IX/X (171 Å, filter Al+1) image for April 12, 1996 at 14:27:41 UT (reversed colors)


   
Table 4: April 15, 1996: The radio Quiet Sun Level (QSL) was 7360.0 A/D converter count units (1.000 $\pm $ 0.003) in the Metsähovi 87 GHz map at 12:05 - 12:13 UT (Fig. 5). The radio source location is within the one arcmin beam. The Yohkoh SXT map was taken at 11:18:47 UT (Fig. 6), and the SOHO EIT Fe IX/X image at 12:14:16 UT (Fig. 7)
Point Lat Long 87 GHz Radio EIT SXT
  Deg Deg Relative structure structure structure
      Intensity   within 1 arcmin within 1 arcmin
1N 55.5 22.8 1.010 $\pm $ 0.003 brightening LID enhanced brightness
2N 40.2 4.5 1.007 $\pm $ 0.003 brightening LID/LIE nearby enhanced brightness
3N 53.2 -13.9 1.004 $\pm $ 0.003 brightening LID/LIE nearby enhanced/reduced brightness
4N 35.1 -10.1 1.009 $\pm $ 0.003 brightening LIE enhanced brightness
5N 52.8 33.8 1.011 $\pm $ 0.003 brightening LID enhanced brightness
6N 31.5 -20.4 1.010 $\pm $ 0.003 brightening LIE enhanced brightness
7N 53.7 0.4 0.995 $\pm $ 0.003 depression LID enhanced brightness
8N 45.1 -18.5 0.997 $\pm $ 0.003 depression LIE reduced brightness
1S -63.5 -0.3 1.011 $\pm $ 0.003 brightening CH CH
2S -64.5 20.6 1.009 $\pm $ 0.003 brightening CH/LIE CH
3S -60.7 -36.5 1.014 $\pm $ 0.003 brightening CH/LIE CH/enhanced brightness
4S -52.5 43.1 1.010 $\pm $ 0.003 brightening LIE enhanced brightness
5S -46.3 48.9 1.010 $\pm $ 0.003 brightening LID/LIE nearby enhanced brightness
6S -47.5 6.6 1.007 $\pm $ 0.003 brightening LID/LIE nearby enhanced brightness


  \begin{figure}\par\resizebox{12cm}{!}{\includegraphics{ds1721f5.eps}}\end{figure} Figure 5: Solar radio map at 87 GHz (3.5 mm) for April 15, 1996 at 12:05 - 12:13 UT. The greyscale contours (0.5, 0.7, 0.9, 0.98, 0.985, 0.99, and 0.995) represent levels below the quiet Sun. The quiet Sun (level 1.000) is plotted in white color, over which are the enhanced levels plotted in contour lines. The contour line level difference (0.3% of the quiet Sun in this case) is also the flux resolution


  \begin{figure}\par\resizebox{16cm}{!}{\includegraphics{ds1721f6.ps}}\par\end{figure} Figure 6: Yohkoh AlMg image from April 15, 1996 at 11:18:47 UT (reversed colors). Overplotted are some selected radio contours (above the quiet Sun level only) of the 12:05 - 12:13 UT map


  \begin{figure}\par\resizebox{18cm}{!}{\includegraphics{ds1721f7.ps}}\end{figure} Figure 7: SOHO/EIT Fe IX/X (171 Å, filter Al+1) image for April 15, 1996 at 12:14:16 UT (reversed colors)


   
Table 5: August 9, 1996: The radio Quiet Sun Level (QSL) was 5380.0 A/D converter count units (1.000 $\pm $ 0.003) in the Metsähovi 87 GHz map at 07:23 - 07:32 UT (Fig. 8). The radio source location is within the one arcmin beam. The Yohkoh SXT map was taken at 07:00:00 UT (Fig. 9), and the SOHO EIT Fe XII image at 07:34:25 UT (Fig. 10)
Point Lat Long 87 GHz Radio EIT SXT
  Deg Deg Relative structure structure structure
      Intensity   within 1 arcmin within 1 arcmin
1N 70.1 16.7 1.015 $\pm $ 0.003 brightening CH CH
2N 62.1 -27.0 1.019 $\pm $ 0.003 brightening LID/LIE CH
3N 52.2 3.9 1.013 $\pm $ 0.003 brightening LID/LIE nearby enhanced brightness
4N 47.4 -42.2 1.013 $\pm $ 0.003 brightening LID CH/enhanced brightness
5N 58.4 49.1 1.010 $\pm $ 0.003 brightening LIE enhanced brightness
6N 42.4 -16.7 0.986 $\pm $ 0.003 depression LID CH
7N 42.5 12.5 0.989 $\pm $ 0.003 depression LID quiet Sun
8N 37.6 1.7 0.988 $\pm $ 0.003 depression LID quiet Sun
1S -52.0 -9.4 1.013 $\pm $ 0.003 brightening LIE enhanced brightness
2S -42.4 42.8 1.021 $\pm $ 0.003 brightening BP/LID nearby BP nearby
3S -34.9 -9.2 0.986 $\pm $ 0.003 depression LID reduced brightness


  \begin{figure}\par\resizebox{12cm}{!}{\includegraphics{ds1721f8.eps}}\end{figure} Figure 8: Solar radio map at 87 GHz (3.5 mm) for August 09, 1996 at 07:23 - 07:32 UT. The greyscale contours (0.5, 0.7, 0.9, 0.98, 0.985, 0.99, and 0.995) represent levels below the quiet Sun. The quiet Sun (level 1.000) is plotted in white color, over which are the enhanced levels plotted in contour lines. The contour line level difference (0.3% of the quiet Sun in this case) is also the flux resolution


  \begin{figure}\par\resizebox{16cm}{!}{\includegraphics{ds1721f9.ps}}\end{figure} Figure 9: Yohkoh SXT AlMg image from August 09, 1996 at 07:00:00 UT (reversed colors). Overplotted are some selected radio contours (above the quiet Sun level only) of the 07:23 - 07:32 UT map


  \begin{figure}\par\resizebox{18cm}{!}{\includegraphics{ds1721f10.ps}}\end{figure} Figure 10: SOHO/EIT Fe XII (195 Å, filter Clear) image for August 09, 1996 at 07:34:25 UT (reversed colors)


   
Table 6: August 13, 1996: The radio Quiet Sun Level (QSL) was 5950.0 A/D converter count units (1.000 $\pm $ 0.003) in the Metsähovi 87 GHz map at 12:31 - 12:39 UT (Fig. 11). The radio source location is within the one arcmin beam. The Yohkoh SXT map was taken at 12:39:53 UT (Fig. 12), and the SOHO EIT Fe IX/X image at 12:30:13 UT (Fig. 13)
Point Lat Long 87 GHz Radio EIT SXT
  Deg Deg Relative structure structure structure
      Intensity   within 1 arcmin within 1 arcmin
1N 64.7 -6.9 1.013 $\pm $ 0.003 brightening BP or PP BP
2N 68.5 21.6 1.014 $\pm $ 0.003 brightening PP CH
3N 64.3 47.8 1.010 $\pm $ 0.003 brightening PP CH
4N 55.5 50.8 1.005 $\pm $ 0.003 brightening LID/LIE CH
5N 52.4 5.1 0.989 $\pm $ 0.003 depression LID/LIE CH
1S -45.2 -26.3 1.016 $\pm $ 0.003 brightening LIE enhanced brightness
2S -40.1 -41.3 1.014 $\pm $ 0.003 brightening LIE reduced brightness
3S -29.8 -22.9 1.011 $\pm $ 0.003 brightening LID enhanced brightnes
4S -42.9 -1.6 1.011 $\pm $ 0.003 brightening LID/BP nearby enhanced brightness
5S -50.5 35.7 1.006 $\pm $ 0.003 brightening LIE reduced brightness
6S -53.1 13.6 0.992 $\pm $ 0.003 depression CH CH
7S -38.0 -12.4 0.998 $\pm $ 0.003 depression LIE enhanced brightness


  \begin{figure}\par\resizebox{12cm}{!}{\includegraphics{ds1721f11.eps}}\end{figure} Figure 11: Solar radio map at 87 GHz (3.5 mm) for August 13, 1996 at 12:31 - 12:39 UT. The greyscale contours (0.5, 0.7, 0.9, 0.98, 0.985, 0.99, and 0.995) represent levels below the quiet Sun. The quiet Sun (level 1.000) is plotted in white color, over which are the enhanced levels plotted in contour lines. The contour line level difference (0.3% of the quiet Sun in this case) is also the flux resolution


  \begin{figure}\par\resizebox{16cm}{!}{\includegraphics{ds1721f12.ps}}\end{figure} Figure 12: Yohkoh SXT AlMg image from August 13, 1996 at 12:39:53 UT (reversed colors). Overplotted are some selected radio contours (above the quiet Sun level only) of the 12:31 - 12:39 UT map


  \begin{figure}\par\resizebox{18cm}{!}{\includegraphics{ds1721f13.ps}}\end{figure} Figure 13: SOHO/EIT Fe IX/X (171 Å, filter Clear) image for August 13, 1996 at 12:30:13 UT (reversed colors)


 

 
Table 7: August 14, 1996: The radio Quiet Sun Level (QSL) was 1985.0 A/D converter count units (1.000 $\pm $ 0.003) in the Metsähovi 87 GHz map at 12:55 - 13:03 UT (Fig. 14). The radio source location is within the one arcmin beam. The Yohkoh SXT map was taken at 12:39:41 UT (Fig. 15), and the SOHO EIT Fe IX/X image at 12:30:13 UT (Fig. 16)
Point Lat Long 87 GHz Radio EIT SXT
  Deg Deg Relative structure structure structure
      Intensity   within 1 arcmin within 1 arcmin
1N 67.5 30.0 1.018 $\pm $ 0.003 brightening LIE CH
2N 67.4 -11.5 1.015 $\pm $ 0.003 brightening PP? CH
3N 49.6 -47.0 1.006 $\pm $ 0.003 brightening LID enhanced brightness
4N 51.3 14.8 0.987 $\pm $ 0.003 depression LID CH
1S -39.8 -9.4 1.021 $\pm $ 0.003 brightening LID/BP nearby BP
2S -40.9 12.7 1.015 $\pm $ 0.003 brightening LID enhanced brightness
3S -25.3 31.3 1.018 $\pm $ 0.003 brightening LIE enhanced brightness
4S -35.1 -32.8 1.013 $\pm $ 0.003 brightening LID/BP nearby enhanced brightness
5S -50.9 24.9 0.997 $\pm $ 0.003 depression CH CH
6S -26.3 3.1 0.997 $\pm $ 0.003 depression LID quiet Sun



  \begin{figure}\par\resizebox{12cm}{!}{\includegraphics{ds1721f14.eps}}\end{figure} Figure 14: Solar radio map at 87 GHz (3.5 mm) for August 14, 1996 at 12:55 - 13:03 UT. The greyscale contours (0.5, 0.7, 0.9, 0.98, 0.985, 0.99, and 0.995) represent levels below the quiet Sun. The quiet Sun (level 1.000) is plotted in white color, over which are the enhanced levels plotted in contour lines. The contour line level difference (0.3% of the quiet Sun in this case) is also the flux resolution


  \begin{figure}\par\resizebox{16cm}{!}{\includegraphics{ds1721f15.ps}}\end{figure} Figure 15: Yohkoh SXT Al.1 image from August 14, 1996 at 12:39:41 UT (reversed colors). Overplotted are some selected radio contours (above the quiet Sun level only) of the 12:55 - 13:03 UT map


  \begin{figure}\par\resizebox{18cm}{!}{\includegraphics{ds1721f16.ps}}\end{figure} Figure 16: SOHO/EIT Fe IX/X (171 Å, filter Clear) image for August 14, 1996 at 12:30:13 UT (reversed colors)


 

 
Table 8: May 20, 1997: The radio Quiet Sun Level (QSL) was 6910.0 A/D converter count units (1.000 $\pm $ 0.005) in the Metsähovi 87 GHz map at 13:03 - 13:12 UT (Fig. 17). The radio source location is within the one arcmin beam. The Yohkoh SXT map was taken at 13:15:13 UT (Fig. 18), and the SOHO EIT Fe IX/X image at 13:00:13 UT (Fig. 19)
Point Lat Long 87 GHz Radio EIT SXT  
  Deg Deg Relative structure structure structure  
      Intensity   within 1 arcmin within 1 arcmin  
1N 58.7 -2.8 1.006 $\pm $ 0.005 brightening CH/LIE enhanced brightness  
2N 47.8 -10.2 1.001 $\pm $ 0.005 brightening LID/LIE enhanced brightness  
3N 44.4 26.7 1.011 $\pm $ 0.005 brightening LID/LIE enhanced brightness  
4N 53.6 -22.9 0.997 $\pm $ 0.005 depression LID/LIE quiet Sun/CH  
5N 54.8 18.1 0.993 $\pm $ 0.005 depression LID/LIE CH  
6N 33.7 10.7 0.988 $\pm $ 0.005 depression LID reduced brightness  
1S -47.1 -29.6 1.013 $\pm $ 0.005 brightening LIE BP?  
2S -59.5 1.2 1.004 $\pm $ 0.005 brightening LIE/LID CH  
3S -53.3 28.4 1.006 $\pm $ 0.005 brightening LIE BP?  
4S -41.8 -4.4 1.006 $\pm $ 0.005 brightening LID/LIE reduced brightness  
5S -50.4 -9.0 0.993 $\pm $ 0.005 depression LID/LIE reduced brightness  
6S -43.8 28.1 0.997 $\pm $ 0.005 depression LID/LIE nearby reduced brightness  



  \begin{figure}\par\resizebox{12cm}{!}{\includegraphics{ds1721f17.eps}}\end{figure} Figure 17: Solar radio map at 87 GHz (3.5 mm) for May 20, 1997 at 13:03 - 13:12 UT. The greyscale contours (0.5, 0.7, 0.9, 0.98, 0.985, 0.99, and 0.995) represent levels below the quiet Sun. The quiet Sun (level 1.000) is plotted in white color, over which are the enhanced levels plotted in contour lines. The contour line level difference (0.5% of the quiet Sun in this case) is also the flux resolution


  \begin{figure}\par\resizebox{16cm}{!}{\includegraphics{ds1721f18.ps}}\end{figure} Figure 18: Yohkoh SXT AlMg image from May 20, 1997 at 13:15:13 UT (reversed colors). Overplotted are some selected radio contours (above the quiet Sun level only) of the 13:03 - 13:12 UT map


  \begin{figure}\par\resizebox{18cm}{!}{\includegraphics{ds1721f19.ps}}\end{figure} Figure 19: SOHO/EIT Fe IX/X (171 Å, filter Clear) image for May 20, 1997 at 13:00:13 UT (reversed colors)


 

 
Table 9: August 8, 1997: The radio Quiet Sun Level (QSL) was 5350.0 A/D converter count units (1.000 $\pm $ 0.004) in the Metsähovi 87 GHz map at 11:30 - 11:39 UT (Fig. 20). The radio source location is within the one arcmin beam. The Yohkoh SXT map was taken at 11:03:59 UT (Fig. 21), and the SOHO EIT Fe IX/X image at 13:09:46 UT (Fig. 22)
Point Lat Long 87 GHz Radio EIT SXT
  Deg Deg Relative structure structure structure
      Intensity   within 1 arcmin within 1 arcmin
1N 65.6 38.9 1.009 $\pm $ 0.004 brightening CH CH/quiet Sun
2N 66.7 -8.3 1.004 $\pm $ 0.004 brightening CH CH
3N 51.8 43.7 1.005 $\pm $ 0.004 brightening LID/LIE enhanced brightness
4N 55.7 -39.9 1.007 $\pm $ 0.004 brightening LIE/BP enhanced brightness
5N 47.1 -22.7 1.003 $\pm $ 0.004 brightening LIE/BP enhanced brightness
6N 40.1 -10.9 1.002 $\pm $ 0.004 brightening LID CH/quiet Sun
7N 52.2 -9.5 0.982 $\pm $ 0.004 depression LID/LIE CH
1S -37.5 -43.7 1.032 $\pm $ 0.004 brightening LIE enhanced brightness
2S -30.9 -23.6 1.038 $\pm $ 0.004 brightening LID/LIE nearby AR
3S -52.4 2.8 1.009 $\pm $ 0.004 brightening LID/LIE enhanced brightness
4S -22.8 26.3 1.040 $\pm $ 0.004 brightening AR AR
5S -21.0 -19.5 1.036 $\pm $ 0.004 brightening AR AR
6S -35.2 -6.2 0.998 $\pm $ 0.004 depression LID reduced brightness



  \begin{figure}\par\resizebox{12cm}{!}{\includegraphics{ds1721f20.eps}}\end{figure} Figure 20: Solar radio map at 87 GHz (3.5 mm) for August 8, 1997 at 11:30 - 11:39 UT. The greyscale contours (0.5, 0.7, 0.9, 0.98, 0.985, 0.99, and 0.995) represent levels below the quiet Sun. The quiet Sun (level 1.000) is plotted in white color, over which are the enhanced levels plotted in contour lines. The contour line level difference (0.4% of the quiet Sun in this case) is also the flux resolution


  \begin{figure}\par\resizebox{16cm}{!}{\includegraphics{ds1721f21.ps}}\end{figure} Figure 21: Yohkoh SXT AlMg image from August 8, 1997 at 11:03:59 UT (reversed colors). Overplotted are some selected radio contours (above the quiet Sun level only) of the 11:30 - 11:39 UT map


  \begin{figure}\par\resizebox{18cm}{!}{\includegraphics{ds1721f22.ps}}\end{figure} Figure 22: SOHO/EIT Fe IX/X (171 Å, filter Clear) image for August 8, 1997 at 13:09:46 UT (reversed colors)


 

 
Table 10: August 27, 1997: The radio Quiet Sun Level (QSL) was 4560.0 A/D converter count units (1.000 $\pm $ 0.005) in the Metsähovi 87 GHz at 12:13 - 12:22 UT (Fig. 23). The radio source location is within the one arcmin beam. The Yohkoh SXT map was taken at 12:53:45 UT (Fig. 24), and the SOHO EIT Fe IX/X image at 13:01:03 UT (Fig. 25)
Point Lat Long 87 GHz Radio EIT SXT  
  Deg Deg Relative structure structure structure  
      Intensity   within 1 arcmin within 1 arcmin  
1N 68.4 -7.1 1.018 $\pm $ 0.005 brightening CH CH  
2N 65.8 -27.2 1.026 $\pm $ 0.005 brightening LIE enhanced brightness (large loop)  
3N 66.9 13.4 1.015 $\pm $ 0.005 brightening CH CH  
4N 62.3 41.5 1.012 $\pm $ 0.005 brightening LID/LIE CH  
5N 56.5 -40.9 1.018 $\pm $ 0.005 brightening LIE enhanced brightness  
6N 55.2 11.1 0.991 $\pm $ 0.005 depression LID CH  
1S -42.0 27.6 1.025 $\pm $ 0.005 brightening LID/LIE enhanced brightness  
2S -35.6 40.2 1.024 $\pm $ 0.005 brightening LID reduced brightness  
3S -48.5 -14.8 1.014 $\pm $ 0.005 brightening LID/LIE nearby enhanced brightness/CH  
4S -36.6 -2.8 1.014 $\pm $ 0.005 brightening LID/LIE enhanced brightness  
5S -42.1 -29.1 1.021 $\pm $ 0.005 brightening LID/LIE enhanced brightness  
6S -31.7 9.1 0.987 $\pm $ 0.005 depression LID reduced brightness  



  \begin{figure}\par\resizebox{12cm}{!}{\includegraphics{ds1721f23.eps}}\end{figure} Figure 23: Solar radio map at 87 GHz (3.5 mm) for August 27, 1997 at 12:13 - 12:22 UT. The greyscale contours (0.5, 0.7, 0.9, 0.98, 0.985, 0.99, and 0.995) represent levels below the quiet Sun. The quiet Sun (level 1.000) is plotted in white color, over which are the enhanced levels plotted in contour lines. The contour line level difference (0.5% of the quiet Sun in this case) is also the flux resolution


  \begin{figure}\par\resizebox{16cm}{!}{\includegraphics{ds1721f24.ps}}\end{figure} Figure 24: Yohkoh SXT Al.1 image from August 27, 1997 at 12:53:45 UT (reversed colors). Overplotted are some selected radio contours (above the quiet Sun level only) of the 12:13 - 12:22 UT map


  \begin{figure}\par\resizebox{18cm}{!}{\includegraphics{ds1721f25.ps}}\end{figure} Figure 25: SOHO/EIT Fe IX/X (171 Å, filter Clear) image for August 27, 1997 at 13:01:03 UT (reversed colors)


 

 
Table 11: August 28, 1997: The radio Quiet Sun Level (QSL) was 4480.0 A/D converter count units (1.000 $\pm $ 0.005) in the Metsähovi 87 GHz map at 07:16 - 07:24 UT (Fig. 26). The radio source location is within the one arcmin beam. The Yohkoh SXT map was taken at 07:23:28 UT (Fig. 27), and the SOHO EIT He II/Si XI image at 07:18:19 UT (Fig. 28)
Point Lat Long 87 GHz Radio EIT SXT
  Deg Deg Relative structure structure structure
      Intensity   within 1 arcmin within 1 arcmin
1N 64.5 24.3 1.012 $\pm $ 0.005 brightening CH (He II: LIE) CH
2N 64.3 -10.2 1.023 $\pm $ 0.005 brightening CH enhanced brightness (large loop)
3N 63.7 -26.9 1.033 $\pm $ 0.005 brightening LID/LIE enhanced brightness (large loop)
4N 57.6 -40.6 1.026 $\pm $ 0.005 brightening LID/LIE enhanced brightness (large loop)
5N 54.8 -5.1 1.013 $\pm $ 0.005 brightening LID/BP nearby enhanced brightness
6N 52.4 20.0 0.992 $\pm $ 0.005 depression LID reduced brightness
7N 41.1 -3.5 0.996 $\pm $ 0.005 depression LID reduced brightness
1S -56.3 22.7 1.006 $\pm $ 0.005 brightening LID/LIE reduced brightness
2S -30.4 8.9 1.008 $\pm $ 0.005 brightening LID enhanced brightness/BP nearby
3S -25.0 -28.7 1.040 $\pm $ 0.005 brightening AR AR
4S -36.5 48.7 1.021 $\pm $ 0.005 brightening LID/LIE nearby enhanced brightness



  \begin{figure}\par\resizebox{12cm} {!}{\includegraphics{ds1721f26.eps}}\end{figure} Figure 26: Solar radio map at 87 GHz (3.5 mm) for August 28, 1997 at 07:16 - 07:24 UT. The greyscale contours (0.5, 0.7, 0.9, 0.98, 0.985, 0.99, and 0.995) represent levels below the quiet Sun. The quiet Sun (level 1.000) is plotted in white color, over which are the enhanced levels plotted in contour lines. The contour line level difference (0.5% of the quiet Sun in this case) is also the flux resolution


  \begin{figure}\par\resizebox{16cm}{!}{\includegraphics{ds1721f27.ps}}\end{figure} Figure 27: Yohkoh SXT Al.1 image from August 28, 1997 at 07:23:28 UT (reversed colors). Overplotted are some selected radio contours (above the quiet Sun level only) of the 07:16 - 07:24 UT map


  \begin{figure}\par\resizebox{18cm}{!}{\includegraphics{ds1721f28.ps}}\end{figure} Figure 28: SOHO/EIT He II (304 Å, filter Clear) image for August 28, 1997 at 07:18:19 UT (reversed colors)


  \begin{figure}\begin{tabular}{cc} \includegraphics[width=6cm]{ds1721f29topleft.p... ...s} & \includegraphics[width=6cm]{ds1721f29lowright.eps}\end{tabular}\end{figure} Figure 29: SOHO/EIT images from the south pole region of the Sun on April 15, 1996: He II (304 Å, T = 80000 K, reversed colours) at 13:12 UT (top left), Fe IX/X (171 Å, T = 1.3 MK) at 12:14 UT (top right), Fe XII (195 Å, T = 1.6 MK) at 12:20 UT (bottom left), and Fe XV (284 Å, T = 2.0 MK) at 13:00 UT (bottom right). Superimposed are some selected radio contour lines (white), that show emission above the quiet Sun level (7200 K) at 3.5 mm wavelength at 12:05 - 12:13 UT. The black circles in the Fe XV image (bottom right) show the positions of the EUV and X-ray bright points mentioned in the text. The circles also represent the radio resolution, i.e., a beam size of 60 arcsec. Radio enhancements are seen over the coronal hole and diffuse emission regions, while the EUV bright points only have very faint radio signatures. The same regions are presented in soft X-rays in Fig. 30


  \begin{figure}\par\resizebox{8cm}{!}{\includegraphics{ds1721f30left.ps}}\resizebox{8cm}{!}{\includegraphics{ds1721f30right.ps}}\end{figure} Figure 30: Left: Yohkoh SXT AlMg image from April 15, 1996, at 13:12:58 UT. The southern coronal hole area is seen in black, and soft X-ray bright points bright. Superimposed are the 3.5 mm radio contours that are above the quiet Sun level, at 12:05 - 12:13 UT. Radio enhancements are seen over the coronal hole area, while the two X-ray bright points (seen in EUV in Fig. 29) only have very faint radio signatures. The emission areas of the two bright points are much smaller in X-rays than in EUV. Right: SOHO/EIT He II image on August 28, 1997 at 07:18:19 UT, with the radio map from 07:16 - 07:24 UT superimposed


  \begin{figure}\par\resizebox{8cm}{!}{\includegraphics{ds1721f31left.ps}}\resizebox{8cm}{!}{\includegraphics{ds1721f31right.ps}}\end{figure} Figure 31: Left: Radio map observed on August 28, 1997 at 06:56-07:05 UT superimposed on the Yohkoh SXT Al.1 image at 07:04:14 UT. Right: Radio map observed at 07:16 - 07:24 UT, superimposed on the same Yohkoh SXT map with reversed colors. Radio enhancements are seen in both of the radio maps, at approximately the same locations, that were scanned 19 minutes apart. The enhancements lie over or nearby some X-ray bright points, but the bright point in S16W13 shows no radio emission above the quiet Sun level. Grid spacing in the figure is 15 degrees

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