HOP list   Monthly Events

HINODE Operation Plan (HOP)

accepted on


 HOP No.

 HOP title

HOP 0062

CORE: Thermal distributions and evolutions of coronal structures

plan term


@ @


 name : Weber, Reeves, Schmelz, Saar @  e-mail : mweber[at]cfa.harvard.edu

contact person in HINODE team

 name : Weber @  e-mail : mweber[at]cfa.harvard.edu

 abstract of observational proposal
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.

 request to SOT

 request to XRT
The following multi-filter XOBs have been previously tested:

- XOB 1476 for 2-minute cadence
- XOB 1468 for 90-second cadence

The Al-mesh filter is currently not being used for regular observations.
AEC is desired but may have to be adjusted for targets.

 request to EIS
Raster scans in wavelengths compatible for XRT thermal analysis. Must include 195A. (Harry Warren has indicated that any EIS full-CCD raster would do; email on Dec-11.)

 other participating instruments
TRACE: Running 195A in main loop, and at least white-light in context.  For coordination with TRACE during its eclipse season, the observation periods and approximate target pointings should be selected 2-3 days in advance.

- in January 2008
- 6-hour segments, 4-6 times (more details below)

- Active region loops preferred (ToO, probably)
- XBPs
- on-disk preferably, at-limb possibly

HOP list   Monthly Events