RHESSI software changes
Tolbert, Kim
kim.tolbert at nasa.gov
Fri Mar 3 19:59:56 MST 2017
Dear RHESSI software users,
On Friday, March 3, we put some new RHESSI data accumulation software
online in the SSW hessi atest directory. For the most part, the changes
should be transparent to almost every user. The main changes are
* Since January 2014, electronic errors in the detectors moved some
events to energies up to 100-150 keV higher than their actual
energy. These events are now identified and removed. This effect was
getting worse with time. If you found higher energy emission than
expected, you should look again with this new software.
* Livetime accumulations at very small time bins (<512 binary
microseconds) were not being reported correctly. Fine time bins of
that order are generally only necessary for real spatial structure
on the order of a few arcseconds. If you were imaging sources far
from the spin axis with Grid 1 this might have affected your results.
* Accumulations across packet bunch boundaries were occasionally
problematic. (The software can't process the full data request at
once - it reads and processes groups or bunches of packets
sequentially to accomplish that.) The effect was minor - an
extremely short time interval of incorrect data at the boundary.
Packet boundaries are now handled correctly.
More detail is provided at this link
https://hesperia.gsfc.nasa.gov/ssw/hessi/doc/software/changes/sw_3-mar-2017.htm
(the full software change history is here:
https://hesperia.gsfc.nasa.gov/ssw/hessi/doc/software/changes/sw_changes.html)
Richard and Kim
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://mithra.physics.montana.edu/mailman/private/rhessi_data_analysis/attachments/20170303/2681f880/attachment.html>
More information about the RHESSI_data_analysis
mailing list