Eis40June
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Order-zero image (FeXII 195A)#

Use TRACE data: tri20080107.0600 (reversed color table)



Order-plus image (FeXII 195A)#

Use EIS data: eis_l0_20080107_062226.fits.gz (reversed color table)

40" slot, 15 scans, time duration: roughly 3 minutes



EIS and TRACE Image alignment#



Order-0 (reversed color table)


Order-1 (reversed color table)



Deconvolution results#


EIS did 1" scanning 6 hours before the 40" slot obervation, which covering the small FOV of the 40" slot-scan image - illustrated by dash box.

click here to see EIS data list


The deconvolution is also applied to this small FOV of the image.


Use EIS data: eis_l0_20080107_002701.fits.gz

1" scan, 256 position, time duration: roughly 80 minutes



1" fitted velocity and the deconvolution velocity (side by side)



Conlusions and Discussions#




- CCD pixel size and resolution are different

- Instrument response is different, eg, PSF

- Spectral resolution is different, eg, TRACE covers wider for FeXII 195 line compared with EIS 195 line (according to drw)

- images from TRACE & EIS may have different distortions and alias, which makes alignment difficult

The above factors effect the image quality and thus alignment and reconstruction. However, the above factors can be reduced significantly if both order-0 & 1 images come from same instrument.



Full FOV deconvolution: X shifts are -3, -2, -1, 0, 1, 2, 3 pixels from left to right and top to bottom


Small FOV deconvolution: X shifts are -3, -2, -1, 0, 1, 2, 3 pixels from left to right and top to bottom


For your information:

Ignacio Ugarte-Urra: using 40" slot to do plasma diagnostics: electron density and DEM analysis