I always get hung up on this:
Can you make an image file by filtering an event file with a filter like
[sky=region(src.reg)] where src.reg is a figure like a polygon or
circle, rather than just a box aligned with the x,y axes?
Is there a web page that discusses this?
-- Edwin M. Kellogg SmithsonianAstroObsv Cntr for Astrophys. Cambridge MA firstname.lastname@example.org epage 7367681@ archwireless.net 617-495-7156 (ofc) 877-736-7681(pager) 617-495-7040(fax)
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