greg1\clear plot define real dxy xmin xmax ymin ymax let dxy = &2*1e-3*sec say 'dxy|sec*1e3' "mas" greg1\set marker 6 0 * greg1\column x 3 y 6 z 1 /file &1 limits let xmax = user_xmax|sec+0.01 let xmin = user_xmin|sec-0.01 let ymax = user_ymax|sec+0.01 let ymin = user_ymin|sec-0.01 ! LET YMIN = MAX(-0.20,YMIN) greg1\limits xmax-0.005 xmin-0.005 ymin+0.005 ymax+0.005 sec greg1\set box_location mat define real error[nxy] greg1\set expand 0.6 greg1\values x y z greg1\limits xmax xmin ymin ymax sec greg1\pencil 3 greg1\column z 5 let error = sqrt(z**2+dxy**2) greg1\errorbar x x y error greg1\column z 8 let error = sqrt(z**2+dxy**2) greg1\errorbar y x y error greg1\pencil 2 greg1\connect greg1\point greg1\pen 0 greg1\set expand 1.0 greg1\box /unit sec greg1\label "R.A. Offset (`)" /x greg1\label "Dec. Offset (`)" /y