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User interface and infrastructure (& utilities)
From Jim: "*gtmktime* \ [future name for *gtmaketime*] has been optimized and showed a factor of 50 speedup for a 10^7 s *gtobssim* simulation with standard orbit and rocking. *gtmktime* does not modify TSTART or TSTOP or other date keywords. Wiki Markup
gtselect can now accept a list of FT1 files. Non-GTI keywords are compared for consistency, but GTIs are not examined, so one can have overlapping GTIs (and potentially multiply-included events); and the GTIs are merged without discretion. gtselect ensures that the TSTART, TSTOP, and date-related keywords are synched up to the user's
selections in all HDUs."
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