The images are in: /home/sco/acm_SBSKY (see list.04) I do analysis 04 in: /home/sco/acm_reds_sco2019/Analyses/Analysis03/data % ls -1 /home/sco/acm_SBSKY/*fits > list.04 I make a table file with fits2table. Here is the PARAMS The PARAMSfile is what determine what will be assembled i the table files. % cat PARAMS WAVELEN Filter wavelength (angs) UTHOURS Hours since 0hUT UTDATE UT date (YYYYMMDD) RSTRT Radius position of tracker at start (mm) AZHET HET structure AZ (deg) MILLUM percentage moon illumination PHIMOON angle of separation to moon (deg) ZPSEC ZP for a 1-sec exposure ZPERR mean error of ZPSEC SKYSB sky surface brightness (mags per sq.arcsec) SKYSBERR mean error of SKYSB To get tables: % ACM_ANALYSIS_TABLES list.04 PARAMS N Make a nice plot: % Generic_Points N # edit "xyplotter_auto.pars" % xyplotter_auto A1 PHIMOON SKYSB 20 N % xyplotter_auto A1 MILLUM PHIMOON 21 N