GMOS Data Reduction

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<strong>GMOS</strong> IFU <strong>Reduction</strong>Step to follow Bias and over-scan subtraction from all images (sciencespectra, flats, twilight sky, CuAr arcs, etc) – recommended Identify the fibers using a flat image Construct the FlatI. Spectral flat field to correct for transmission function using the GCAL flats
Step 1: bias subtraction" Use gprepare on your data (Science, flats, CuAr arcs). Thetask will add the MDF to the frames" Suggestion copy the MDF file to your local directoryin case that you need to edit it gnifu_slits_mdf.fitsgprepare @obj.lst rawpath=rawdir$ fl_addmdf+\mdffile=”gnifu_slits_mdf.fits” mdfdir=”gmos$data/”!" Use gfreduce for bias and over scan subtraction" Suggestion: do this interactivelygfreduce g//@obj.lst fl_addmdf- fl_inter+ \!fl_over+ fl_extract- fl_gsappwave- fl_wavtran- \fl_skysub- fl_fluxcal- fl_gscrrej- slits=both!
Page 1 and 2: eminiulti- bject pectrograph GMOS O
Page 7 and 8: to the detectorMask assembly withca
Page 9: GMOS Images: Data ReductionGeneral
Page 13 and 14: GMOS Images: Data Reduction" Basic
Page 15 and 16: Reducing GMOS Images" Be sure to us
Page 17 and 18: " Removing the fringingReducing GMO
Page 19 and 20: Final GMOS imageHCG 87
Page 21 and 22: Integral Field SpectroscopyEach spe
Page 23 and 24: GMOS IFU" Optical Integral Field Sp
Page 25 and 26: GMOS Example: 1 slit mode Mrk996Sky
Page 27 and 28: GMOS IFU: Mask Definition Files" Ma
Page 29 and 30: GMOS IFU ReductionOrganizing your f
Page 31 and 32: GMOS IFU Reduction -> acquisitionGM
Page 33: GMOS IFU Reduction" Basic IRAF data
Page 37 and 38: Step 2: identifying the fibers (spe
Page 45 and 46: Step 3: prepare the flat-field" Mak
Page 47 and 48: Step 4: wavelength calibration" Not
Page 49 and 50: Step 4: wavelength calibration" Mar
Page 51 and 52: Step 4: wavelength calibrationRMS ~
Page 53 and 54: Step 4: wavelength calibrationCheck
Page 55 and 56: Step 5: reducing the science data"
Page 57: Differential Atmospheric Refraction

GMOS Data Reduction

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