The SWIFT BAT Software Guide Version 6.3 30 ... - HEASARC - Nasa

E.6. SWIFT BAT SOFTWARE BUILD 8: 2004 MAY 24 199
corrections are applied to negative weights. Small fixes and
cleanups. The task is compile-compatible with the new attitude
library version by Ed Pier.
battblocks - SIGNIFICANT CHANGES
battblocks - v1.0 - Major changes. The cost function for data with
gaussian errors has been revised, and can be considered
non-experimental. Burst duration measures are now computed, including
T90, T50, and Tnn, where nn is choosable by the user (with the txx
parameter). Also the interval around the peak flux is estimated (the
interval size is determined by the tpeak= parameter). Computations of
these measures is enabled by the durfile= parameter, which specified
an output GTI file. The durations are also written to the master
output GTI as keywords. A second major area of improvement is the
addition of a "progressive" Bayesian blocks implementation, enabled by
the tlookback= parameter, which should be much faster for most time
series. [ This implementation requires two iterations. ]
E.6 Swift BAT Software Build 8: 2004 May 24
1. Outstanding Issues
This build includes several revisions to optimize for speed and
accuracy of the BAT tools. However, there are several things not
included.
a) BAT teldef file is still "Z-pointed" (it should be
straightforward to deliver a new version on a short timescale)
b) A mechanism to construct multiple spectra during slews does not
exist. A new interface must be developed between batmaskwtevt and
batbinevt to pass time-variable auxiliary information to the
response matrix generator.
c) These tools do not take into account all of the file format
changes required by HEASARC.
2. Summary of tools
There are no new tools in this release, only revisions to existing
tools.
Revised tools
batbinevt -
* auto quantization of photon energies;
* cosmetic improvements to output statistics