ctio: Tools for the Cerro Tololo Inter-American Observatory
- apall: Extract 1D spectra (all parameters in one task)
- apdefault: Set the default aperture parameters
- apedit: Edit apertures interactively
- apfind: Automatically find spectra and define apertures
- apflatten: Remove overall spectral and profile shapes from flat fields
- apnormalize: Normalize 2D apertures by 1D functions
- aprecenter: Recenter apertures
- apresize: Resize apertures
- apsum: Extract 1D spectra
- aptrace: Trace positions of spectra
- background: Fit and subtract a line or column background
- bplot: Batch plot of spectra with SPLOT
- calibrate: Apply extinction and flux calibrations to spectra
- continuum: Fit and normalize the continuum of multispec spectra
- deredden: Apply interstellar extinction corrections
- dispcor: Dispersion correct spectra
- dopcor: Doppler correct spectra
- identify: Identify arc lines and determine a dispersion function
- illumination: Determine illumination calibration
- refspectra: Assign reference spectra to observations
- reidentify: Reidentify arc lines and determine new dispersion functions
- response: Determine response calibration
- sarith: Spectrum arithmetic
- scombine: Combine spectra
- scopy: Copy spectra including aperture selection and format changes
- sensfunc: Create sensitivity function
- setairmass: Compute effective airmass and middle UT for an exposure
- setjd: Compute and set Julian dates in images
- sflip: Flip data and/or dispersion coordinates in spectra
- slist: List spectrum headers
- specplot: Stack and plot multiple spectra
- specshift: Shift spectral dispersion coordinate systems
- splot: Plot and analyze spectra
- standard: Identify standard stars to be used in sensitivity calc
- doslit: Process CTIO slit spectra
- demos: Demonstrations and tests