Index of /data/trace/www/SSXG/ynsu/XRT-AIA
Text of PDF
XRT vs. AIA Synoptics
- We take a look at the recent XRT 9-filter synoptic observations on
Jan 5 (12 UT), Jan 9 (20 UT), and Jan 13 (20 UT). We then compare
them with the corresponding AIA images.
- We illustrate our results using the data taken on Jan 5. Two movies
with XRT and AIA observations at different filters and channels can
be found at:
- Thin-Be and Al/poly+Ti/poly are two ideal filters for very dynamic
active region observations.
- All three poly filter images look similar. If we need thinner
filters for normal active regions, then C- poly and Ti-poly are
good options, since spots are more visible in Al-poly images.
- Al-med and Be-med are two good options for the thicker-filter AR
observations. Very few features can be identified in Thick-Al
- 335 channel in AIA is the one that looks closest to XRT images.
- In all XRT filters, Al-mesh is the one looks closest to 335 image.
See Figure 1 in next slide. The AIA 335 image in this presentation
is summed over 3 minutes.
- For some active regions, most XRT filters can see structures which
are not visible in all AIA filters.
- Large scale loop structures surrounding the active regions and loop
structures at the limb are seen in AIA, but are not visible in XRT.
AIA can see dark filaments, which are not observed by XRT.