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Figure 1: X-ray and radio time profiles for the 05:13 November 17, 2006 microflare, showing the GOES soft X-ray emission and RHESSI observations in five energy ranges. The 4-8 keV lightcurve is overplotted with the scaled integrated non-thermal emission >12 keV. The vertical dotted and dashed lines indicate three time periods for which the RHESSI images and spectra have been analyzed: two 12 s impulsive intervals (A and B) and a 36 s thermal period (C). The spectrogram in the bottom panel is Culgoora radio data, showing a strong type III burst. |
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Figure 2: RHESSI hard X-ray spectra for the three time intervals shown in Fig. 1. The black and grey binned lines indicate the background subtracted data and the background emission. The red, blue and black lines show the thermal, broken power-law and total (thermal plus broken power-law) model. The top data line fitted with a green line in the first two spectra is the data fitted with just a broken power-law model, multiplied by 10 to make it distinguishable from the other spectrum. The photon spectra are different for the two fits in the same time interval because they are found from the same count spectra convolved with RHESSI's detector response and the different model fits. |
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Figure 3: X-ray imaging at six different times during the 05:13 November 17, 2006 microflare: ( top left) pre-flare ( top middle) first 12 second impulsive period ( top right) second 12 s impulsive period ( bottom left and middle) 36 second of thermal period and ( bottom right) post-flare. The background images are XRT with either the C-Poly or Ti-Poly filters, the latter using a lower resolution. The number after the time in the title of each image is the exposure time of each XRT image. The overplotted contours (50, 70, 90%) are the RHESSI images reconstructed using the CLEAN algorithm with detectors 3, 4, 6, 8 and 9. The red contours represent the 4-8 keV emission (predominantly thermal) and the blue contours are the 12-60 keV emission (mostly non-thermal). The pointing of all the XRT images have been correct by x+5'' and y+8''. This was found by matching the RHESSI hard X-ray footpoints with XRT bright emission in the trop right image. |
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Figure 4: TRACE 195 Å EUV images of the 05:13 November 17, 2006 microflare: ( left) pre-flare image ( middle) difference image between an image during the RHESSI thermal period and the pre-flare image ( right) difference image between post- and the pre-flare images. The normalization and order of the color scales varies between the pre-flare image and the difference images. |
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Figure 5: TRACE 284 Å EUV difference image during the 05:13 November 17, 2006 microflare. The difference image is between an image just after the impulsive period and the pre-flare. Overplotted are the RHESSI thermal (4-8 keV) and non-thermal (12-60 keV) contours from impulsive interval B. The pointing of the TRACE image has been correct by x+3'' and y+7''. This was found by matching the RHESSI hard X-ray footpoints with bright EUV footpoints. |
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