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Soft-Hard-Harder
2007-03-05 • submitted by Säm Krucker and Hugh Hudson
46
Flares whose spectrum become progressively harder are closely associated with high-energy solar proton events observed in interplanetary space. An analysis of some prominent soft-hard-harder events.
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The RHESSI fifth anniversary: X-flares persist!
2007-02-20 • submitted by Pascal Saint-Hilaire and Gerry Share
45
Another happy birthday but this time for our favorite Solar Spectrometer; RHESSI. At such a significant time, it always helps to take a look back (and forward) in time.
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John Brown and the thick-target model
2007-02-08 • submitted by Lyndsay Fletcher and Hugh Hudson
44
Happy birthday wishes and a discussion of the pluses and minuses of the thick-target model.
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A last best active region
2007-01-22 • submitted by Säm Krucker and Hugh Hudson
43
Solar minimum doesn't always have to be boring. Last but not least active region NOAA 10930 gives us something to think about.
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A solar X-ray dentist mirror
2007-01-08 • submitted by Eduard Kontar and Hugh Hudson
42
An introductory discussion on the effect of Compton scattering off the solar atmosphere (aka albedo) on the photon spectrum. These albedo x-rays can be used as a dentist's mirror to look at the source from behind.
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This material is based upon work supported by NASA unless otherwise noted. Any opinions, findings, and conclusions or recommendations expressed are those of the author(s).