GMOS Data Reduction

gsextractgsextract @tgsNsciencefile fl_inter+ find+ back=fitbfunct=“chebyshev” border=1 tfunct=“spline3” torder=5tnsum=20 tstep=50 refimage=“” apwidth= 1.3 recent+trace+ fl_vardq+ weights="variance"@tgsNsciencefiles: list of “gtransformed” science spectrafind+: find spectra automaticallyback=fit: subtract the fit to the background regiontrace+: trace spectrab/tfunct: function to fit to background/traceb/torder: order of function to fit to background/tracetnsum: number of dispersion lines to sum for tracetstep: trace samplingrefimage: reference image for tracing (useful for low counts)apwidth: width of extraction aperture, in arcsecondsrecent+: recenter spectrum automaticallyweights: type of extraction weighting