Long Slit 1D Reduction Basic Steps: MIDAS version, Manual (postscript)

After "inmidas" or "gomidas"

. set/midas workenv=midas	bdf and tbl file formats, not in fits files
. set/con long	Context "Lond Slit 1D" enabled
. graph/long
. make/display
. set/graph stype=0 ltype=1
. intape/fits 1 dark da_tug_0020.fits	Transform fits files to midas format. Each image will be in *.bdf format and tables in *.tbl
. comp/ima hal_b = hal0001 - dark0001	Make dark correction to Hallogen lamp spectra
. comp/ima ne_b = ne0001 - dark0001	Make dark correction to Neon arc lamp spectra
. comp/ima g81_b = g810001 - dark0001	Make dark correction to Grizm8 star spectra
. norm/flat hal_b fhal_bn deg=3	Normalize hallogen flat image
. comp/ima ne_bn = ne_b / fhal_bn	Make flat field correction to frames..
. comp/ima g81_bn = g81_b / fhal_bn
. extract/long ne_bn ne_ext 0 1030,1050 3,3 5,1,3	Extract spectral lines from arc spectra
. extract/long g81_bn g81_bn_ext 0 1030,1050 3,3 5,1,3
. search/long ne_ext yaver=2 thres=30	Find positions of lines in spectral frame
. ident/long ne_ext tol=4 YSTART=0	Identfy spectral lines of arc lamp to get dispersion coeff. Use Spectral Lamps and FeAr_gr8 for line identification Grism resp. curves
. plot/ident
. calib/long	Dispersion fit
. plot/calibrate
. plot/delta
. plot/residual
. plot/distortion
. appl/disp g81_bn_ext g81_bn_ext_wl	Appl. dispersion to extracted lines (convert to wavelenght)
. plot/spec g81_bn_ext_wl
. ......	Other issues...

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Umit Kiziloglu, Mar, 2006