4.13 Looking at Time-Profiles of Temperatures (GO_TEEM)

The GO_TEEM procedure computes the time-profile of the spatially averaged electron temperature (Te) and emission measure (EM) for a processed data cube. The results are plotted to the screen and are also saved to the return variables and so they can be saved for later reference. The program prompts the user to select a pair of thin and thick filters to be used in the computation, an interpolation method (none is an option) and a reference image from the data cube from which the user can view in detail. Once the user has reviewed the selected reference image and decided which parts of the image to study, the user then uses various tools to specify small or large arbitrarily shaped regions to study the time-profiles.

Processed data cubes can be made in the following way:

• Run YODAT selecting the data of interest. While running YODAT use the SSWHERE option to reduce these data being careful to select only the normal mode data (get rid of dark frames), all the possible X-ray filters you wish to use, and all the exposures. Also use the FOV option to get only those data from the general area of interest.

• Run SXT_PREP to decompress, dark current subtract, and align the data. If your input data were taken in full and half resolution or were of different sizes be sure to specify the output resolution and size. Most importantly specify the output variables for uncertainty and saturated pixels as these are required in the GO_TEEM procedure.

A sample call for SXT_PREP is:
IDL> sxt_prep, in_index, in_data, out_index, out_data, unc_data, satpix, /reg
The out_index and out_data (in units of data number (DN)) can then be saved to a user created ``sda'' file with a simple call to SAV_SDA:
IDL> sav_sda, 'my_processed_data', out_index, out_data
Example call to GO_TEEM:
IDL> go_teem, out_index, out_data, te, em, dte, dem, f11, fl2, time=time, $
 
IDL> comments=comments, unc=unc, satpix=satpix, /interp
Where: