Last updated: 17 Jan 2002

NEW: Manuscripts of July 23 papers can be found here

New: July 23 2002 flare: Nonuniform ionisation target fit

July 23 2002 flare: Imaging spectroscopy

Temporal variation of spectral index:
NEW: Spectral index was calculated in 20-60 keV range.

NEW: Comparison with spatially integrated spectra.

Corona source	Loop top source
Southern footpoint	Northern footpoint

Spatial variation of spectral index:

NEW: Spectral index contour maps (white lines) over
3 CLEAN images in differen energy ranges:
10-15 keV - red lines
35-40 keV - green lines
60-65 keV - blue lines

Variation of the spectral index dlog(J(e))/dlog(e) vs position:

Four figures are given for every time interval

Top-right: Combination of two CLEAN images with normalized intensity in 70-75kev band
and 35-40kev band; Square dots show the maximum in intensity -> the assumed magnetic loop.
Bottom-right: The same as previous overlaid with spectral index map. Spectral index was calculated in 20-60 kev range.
Top-left: Altitude of above the Sun assuming loop is perpendicular to solar surface.
Bottom-left: Variation of spectral index along the reconstructed loop.(when loop structure is not obvious it is just a variation along the line shown in Top-right figure)

Pixon images (updated 10/04/2003)

MEM SATO images (updated 28/11/2002)

002620-002640 UT [ps file]
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CLEAN images (updated 18/11/2002):

002540-002600 UT [ps file] A1
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003940-004000 UT [ps file] A1->A3

Forward Fit images
(processed by Gordon Emslie)