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spetral : reduction - Coggle Diagram
spetral : reduction
extraction of 1-d spectrum
trace the oders
Remove the background
Reject cosmic rays
Collapse or optimal extraction
Wavelength calibration
Emission lamp
Absorption cell
Fairy perot
Laser frequency comb
Other considerations
Atmospheric dispersion correction
Slit height, position of stars
Binning
Spetral normalization
Remove the continuum and blaze
Measure radial velocity by the wave shift
Line profiles
Line broadening
Natural
Pressure (gravity)
Thermal
Rotation
instrument
measure radial velocity by red shift
Special flats
Different pixels has absorption efficiencies for specific wavelength
Flux calibration
Standards
Hot stars like white dwarf
Compact planetary nebulae
Background subtraction