; notes provided by cal: ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; ; ; 2/ The HRC-S QEU is in an IDL save file. ; Rather than a 2-d QEU we are providing QEU just along the LETG ; dispersion line. This can be duplicated into the cross-dispersion ; dimension. We have had difficulties quantifying QEU outside the ; dispersion line. So in the file you'll find [ energy (keV), ; dispersion V-coord, QEU ] for the 3 segments individually and for ; the full scale detector. ; I don't currently have the center segment divided into the regions ; defined by the UVIS as your 203,202,204. I believe the V-to-CHIPY ; coordinate transformation is straight forward (?), and then your ; active region and UVIS boundaries will apply. I hope this format is ; workable. If you need something else, let me know... ; The variables in the idlsave file are: ; xx_nrg_int interpolated/extrapolated energy 0.06-12.0keV ; xx_lam_int 12.3985/xx_nrg_int ; yy_mm_int_wp dispersion location in mm for +1 Wing Plate ; yy_vcoord_int_wp dispersion V-coord. for +1 Wing Plate (16384:1) ; qe_2d_int_wp QEU +1 Wing Plate ; yy_mm_int_c0 dispersion location in mm for Center Plate ; yy_vcoord_int_c0 dispersion V-coord. for Center Plate (32768:16385) ; qe_2d_int_c0 QEU Center Plate ; yy_mm_int_wm dispersion location in mm for -1 Wing Plate ; yy_vcoord_int_wm dispersion V-coord. for -1 Wing Plate (49152:32769) ; qe_2d_int_wm QEU -1 Wing Plate ; yy_mm_tot dispersion location in mm full scale ; yy_vcoord_tot dispersion V-coord. full scale (49152:1) ; qe_2d_tot QEU full scale ; ;For example in IDL: ; restore,'hrcs_qeu_ext_0105.idlsave',/verbose ; surface,qe_2d_tot,xx_nrg_int,yy_vcoord_tot,xlog=1,/xs,/ys,/zs,ax=45,$ ; xtit='energy (keV)',ytit='V-axis (dispersion)',ztit='QEU',chars=3. ; ;gives you an idea of what we're working with ; 3/ Some notes: ; - - The flat field data from which the QEU is derived is binned by ; 128 pixels (half-tap). The V-coord. values supplied are the value of ; the bin centers. Also note that the V-coord is in the "-x" sense. ; - - The nominal dispersion U-axis coord. in half-tap bins is bin ; 16. Since the dither pattern is larger than the 128 pixel binsize, ; we defined the dispersion strip as an average of u=15, u=16 and ; u=17. ; - - The QEU is just MCP QE, the UVIS has been removed. ; For these QE/QEU analyses we've used: ; - - hrmaD1996-12-20effareaN0005.rdb ; - - letgD1996-11-01greffN0004.rdb ; - - HRC-S UVIS v3 ; - - extraction region efficiency model ; - - source models for Sirius B and PKS 2155-304 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; From: Deron Subject: Re: test of qe, qeu files (or how I"ve learned to hate variable length array fits tables) To: dph Date: Tue, 18 Sep 2001 16:38:09 -0400 (EDT) Content-Type: text/plain; charset=us-ascii My zero-order aimpoint is based on the definition of it being offset -4mm from HRC-S detector center. The full resolution pixel is v = 25198. In the 128 pix binned data I gave you this translates to bin 187, so yy_vcoord[187] = 25153. Here the QEU = 1. for all energies.