Tohban Report 2011-03-09

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Tohban Reports
Start Date: 12 Jan 2011
End Date: 19 Jan 2011
Tohban: Claire Raftery
Tohban email: claire@ssl.berkeley.edu
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Contents

Solar Activity

Activity is really picking up. There were three beta-gamma-delta active regions on the disk at various points during the week. Two of the three BGD regions have rotated off the disk but 11166 is at disk center. In addition, there are a number of large, bright ARs behind the east limb that will rotate on in the coming days.

X-ray background is at C class level right now so the number of C class flares is likely to be more than reported below. Also, there are issues with RHESSI data from the past 24-48 hours: the SSR is not empty and these data have not yet been downloaded. Therefore the true number of RHESSI flares is not known for this week yet. 


How many GOES flares occurred?
 Flares above B, C, M, X class were      1    51     12     0
And how many of these are listed in the RHESSI flare list?
 Flares above B, C, M, X class were      0    33     3     0
And how many had EXCELLENT coverage?
 Flares above B, C, M, X class were      0    16     0     0

There were RHESSI flares/GOES flares         348 /           57
over the time range 02-Mar-11 09-Mar-11

Memory Management

The SSR has a maximum of ~60% and is not emptying.

Data Gaps


These data were later located and are being reprocessed now.

RHESSI Operations

Detector 9 is showing some very strange behavior which began around midnight on 05-03-11. Behavior like this has not been seen before and as yet, it remains undiagnosed. It may be associated with eclipses as the spikes are aggravated just before RHESSI passes into nighttime and the are ease after it emerges into daylight. We have tried lowering the HV on G9 to see if this helps but these data have not yet been downloaded yet. The spikes were initially triggering the attenuators to come in so detector 9 has been taken out of the attenuator formula and replaced with detector 5. Detectors 1,3,4 and 5 now determine the attenuator state. Richard Schwartz also pointed out that data drop-outs are longer in duration and more frequent when G9 is misbehaving. The gaps are 1 to 2 seconds long and can give up to 75% deadtime.

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