especget filestem=myagn srcexp="((DETX,DETY) IN circle(572,-635,800))" backexp="((DETX,DETY) IN annulus(572,-635,1600,3200))" table=P0129360201M1S004MIEVLI0000.FIT
Produces the files myagn_src.ds, myagn_bgd.ds, myagn_src.arf, myagn_src.rmf.
This command takes quite a while to run because of the RMF generation stage . A PN observation will taken roughly twice as long as a PN observation.