Note: there are two different kinds of arcs, ones for N&S, and standard arcs. Check the MASKNAME in the PHU to check which type it is and be sure to use the correct type with the data.
Prepare arc with GSREDUCE
- GSREDUCE ga*
inimages = "ga*" Input GMOS images or list (outimages = "") Output images or list (outpref = "gs") Prefix for output images *(fl_over = no) Subtract overscan level *(fl_trim = yes) Trim off the overscan section *(fl_bias = yes) Subtract bias image (fl_gscrrej = no) Clean images for cosmic rays (fl_dark = no) Subtract (scaled) dark image *(fl_flat = no) Apply flat field correction *(fl_gmosaic = yes) Mosaic science extensions *(fl_fixpix = no) Interpolate across chip gaps if mosaicing *(fl_gsappwave = yes) Run gsappwave on reduced image *(fl_cut = yes) Cut slits into separate spectra if mosaicing (fl_title = yes) Put object id in title of cut spectra (MOS only) (fl_vardq = no) Create variance and data quality frames *(bias = "bias.fits") Bias image name
==> gsreduce fl_over- fl_trim+ fl_bias+ fl_gmos+ fl_gsap+ fl_cut+
- GSWAVELENGTH both arcs seperately
- bad lines: 6057.5, 6298, 6306.65, 6368, 6482.27, 7313, 7352.9
6058.7, 6307, 6368, 6482, 7313, 7352.9, 6298?
- Gemini South: bad lines = 6033, 6058, 6113, 6367, 6482, 7313, 7385
It may be a good idea to print wavelength calibration lines and trace for future reference.
=> 2 gsga (with two central wavelengths)
cleanup: mv ga* proc_images/