Tohban Report 2009-02-18
From RHESSI Wiki
|Start Date:||11 Feb 2009|
|End Date:||18 Feb 2009|
|Next Tohban:||Albert Shih|
|List all reports|
Two nice CMEs from the tiniest of flares, but with all of the bells and whistles (waves, dimmings, sigmoids) from an old-cycle regions. RHESSI observed most of one of them (a B3), but only got a glimpse of the other, about B5]. Both of these events had very nice CMEs - sigmoid, dimming, wave, the works.
The figure below shows how the solar minimum appears now. This updates the plot from a Nugget posted in May 2008.
Data Gaps and problems
9-Feb 01:15 + 2 orbits, bad data
17-feb-09 02:45, bad data
18-feb-09 02:15, bad data
An unusual period of rapid background variability at high energies happened 8-Feb - see here. I can't see any sign of this in the monitor plots and am perplexed.
The fast soft events (3-6 and 6-12 keV) that looked like flares, weren't. They're no doubt due to arcing in one detector. See here for an example.
Albert Shih (firstname.lastname@example.org)