The VISTA spectroscopy commands are:
- MASH
- extract a spectrum from an image by summing (mashing)
adjacent image rows or columns.
- SPECTROID
- extract a spectrum that curves across an image
(also used to map curved extraction apertures).
- EXTRACT
- optimal extraction of the spectra of faint or
moderately faint point-sources (Horne Algorithm).
- LINEID
- identify lines in a wavelength calibration spectrum.
- WSCALE
- compute wavelength calibration solutions from
identified lamp lines.
- COPW
- apply (copy) a wavelength scale to a spectrum.
- ALIGN
- re-sample a spectrum onto a linearized wavelength
scale (or adjust an existing spectrum).
- SKYLINE
- re-calibrate wavelengths using night sky lines.
- EXTINCT
- correct a spectrum for atmospheric extinction.
- SETUP
- set the Longitude and Latitude for extinction correction
- FLUXSTAR
- compute flux calibration curves from observations
of flux standard stars.
- FLUX
- apply flux calibration to a spectrum.
- POLY
- fit a polynomial to a spectrum.
- STRETCH
- expand (stretch) and spectrum into a 2-D image.
- ISPLINE
- interactively fit a spline to a spectrum.
- ROWFIT
- fit a polynomial to each row of an image.
- FINDSHIFT
- find relative shifts between two spectra.
- FINDPEAK
- find the position of a spectrum along rows or
columns.
- SPINDEX
- measures equivalent widths at each row of an image
- FQUO
- fits a broadening function to Fourier quotient spectra
- EXTSPEC
- extract a given order from a wavelength-calibrated
echelle file.
- EWAVE
- identify lines in an arc spectrum obtained with the
Hamilton spectrograph and compute wavelength scale from line
identifications