RHESSI Tohban report, 23-May-2007 to 4-Jun-2007 Hugh Hudson, hhudson@ssl.berkeley.edu 1. Solar Activity Behold, a miracle: old-cycle activity has returned in force, with many flares including some M-class events. RHESSI has good observations of some of these, specifically 21:45 1-Jun and 06:00 2-Jun, but others as well. The active region is 10,960 and it will be on CM about the 7th (Thursday) and will thus overlap a bit with our Crab observation. How does the Sun KNOW that we're about to offpoint? 2. Memory Management Getting to zero each day. 3. Data Gaps None (note that files hessidata/metadata/data_gap_files/daily_summary/2007_06_01/hsi_test_packet_rate_20070501_0000.gif et seq don't exist yet). 4. Instrument performance I looked at the 25-50 keV rates for the 2-Jun 06:00 flare, with the conclusion that the front segments of G2, G3, and G5 are basically useless now, but that the others are still hanging in there. See http://sprg.ssl.berkeley.edu/~hhudson/scratch/rates.pdf for the details. 4. Crab offpoint In view of the activity, for which the AR will be on the disk for another ten days or so, we are mulling over the wisdom of doing the offpoint this year. A telecon at 11:00 via the RHESSI dial-in line on Wednesday, June 6 is now set for a final discussion of this. 5. Remarkable things 25-May 12:12. Another particle event _exactly_ at the terminator 27-May 12:08. Another particle event _exactly_ at the terminator I know these are coincidences, but still. 6. Next Tohban: Albert Shih