XRT has the capability for thermal studies using multi-filter observation sequences. Some multi-filter observations have been performed to-date, but the XRT Team would like to perform some coordinated observations with EIS and SOT. The primary science objective is study the thermal distribution and evolution of loop structures in active regions as well as XBPs, and cooler coronal structures, as seen by XRT and EIS rasters. (For example, some initial results by Reeves et al. directly show the spatial and thermal distribution of cooling plasma throughout coherent post-flare loop structures.)
There is also a calibration objective to investigate a cross-calibration of XRT with EIS and TRACE such that TRACE might be used as a low-temperature imaging "channel" for XRT thermal analysis.
To completely fulfill the objectives, two or three 6-hour observing segments of an active region are required. In addition (or in the absence of an active region) observations of XBPs and other coronal structures will also provide useful data-sets. |
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