...
Jim Chiang (11/29/06)--It has been proposed by Jean Ballet to compute a hybrid likelihood that
combines an unbinned analysis for higher energy events that have better PSFs and are sparser, and a binned analyis for lower energies, where the PSF is not as good and binning would help speed up the execution without significant loss of accuracy. Alternatively, we could (also) implement a HEALPix binning scheme, based on Toby's work, that would provide similar computational savings.
...
Are any important source types missing? Is simulating residual background at the gtobssim level important, and is it feasible?
Jim Chiang (11/29/06)--A few months ago, I proposed a gtobssim-like tool that would take a livetime cube as input, thereby avoiding the necessity of querying for the arrival time of each incident photon and then processing individually through the IRFs. This tool would not use the flux package and so would need a new infrastructure for folding the incident source fluxes through the instrument response. In addition, for the interval covered by the input livetime cube, all sources would be steady and the variation of exposure to a given location on the sky would not be imprinted on the data.
Infrastructure
GUI(s)?
Utilities
...