A

Task Index

2 ·A ·B ·C ·D ·E ·F ·G ·H ·I ·J ·K ·L ·M ·N ·O ·P ·Q ·R ·S ·T ·U ·V ·W ·X ·Y ·Z

absfity -- Smooth an FOS sensitivity curve.
absfitz -- Generate a smooth sensitivity curve.
abssenv -- Calculate digital absolute sensitivity.
absseny -- Compute an FOS sensitivity curve.
abssenz -- Compute the absolute sensitivity ratio.
abund -- Derive ionic abundances relative to H+ in 3-zone nebula
acatpars -- Default astrometry file format parameter set
access -- Test if a file exists
aclist -- List the supported astrometric catalogs
acoadd -- Image coaddition using Lucy Method with optional acceleration.
adaptive -- Adaptive filter.
addmasks -- Combine several masks or bad pixel lists.
addnewkeys -- Add new CALFOS keywords to FOS headers.
addsets -- Add subsets of strings of spectra
addstar -- Add artificial stars to an image using the computed psf
adumpcat -- Catalog access debugging task
adumpim -- Image survey access debugging task
afiles -- Describe the standard astrometry file format
afiltcat -- Filter astrometry files derived from astrometric catalogs
afiltpars -- Default astrometry file filtering parameters
agetcat -- Extract astrometry files from astrometric catalogs
agetim -- Extract FITS images from image surveys
ahedit -- Initialize the image wcs and set standard keywords
aidpars -- Automatic line identification parameters and algorithm
aimfind -- Select images containing catalog objects
aimpars -- Default image data parameters
airmass -- Compute the airmass at a given elevation above the horizon
alignasn -- update shifts in one or two associations from star coords
allocate -- Allocate a device, i.e., magtape drive mta, mtb, ...
allstar -- Group and fit psf to multiple stars simultaneously
analoglin -- Verify the analog linearity of HSP detectors.
apall -- Extract 1D spectra (all parameters in one task)
apbackground -- Background subtraction algorithms
apdefault -- Set the default aperture parameters
apedit -- Edit apertures interactively
apercen -- Find the aperture center (location phase I).
aperlocy -- Analyze a target acquisition image.
apershift -- Shift the wavelengths for an object not centered in the aperture.
apfile -- Prepare an aperture corrections file from a text file
apfind -- Automatically find spectra and define apertures
apfit -- Fit 2D spectra and output the fit, difference, or ratio
apflatten -- Remove overall spectral and profile shapes from flat fields
apmask -- Create and IRAF pixel list mask of the apertures
apnoise -- Compute and examine noise characteristics of spectra
apnormalize -- Normalize 2D apertures by 1D functions
apomask -- Tool for making apodizing mask images for cleaning up PSF images
appendix -- Appendices to the Reduction Manuals
apply_bary -- apply the barycenter time corrections to the time-sorted QPOE file
approfiles -- Profile determination algorithms
aprecenter -- Recenter apertures
apresize -- Resize apertures
apropos -- List all the tasks related with a given subject.
apscale -- Scale aperture parameters.
apscatter -- Fit and subtract scattered light
apsum -- Extract 1D spectra
aptest -- Run basic tests on the apphot package tasks
aptrace -- Trace positions of spectra
apvariance -- Extractions, variance weighting, cleaning, and noise model
aregpars -- Default region parameter set
aslist -- List the supported image surveys
asncombine -- subtract background and combine images in asocication
asnexam -- display images in asociations
asnexpand -- Expand ASN tables to include extra ASC columns.
asnphot -- plot mag as function of sub-pixel position
astcalc -- Astronomical calculator
asthedit -- Astronomical header editor
astradius -- Find images within a circle on the sky
asttimes -- Compute UT, Julian day, epoch, and siderial time
at_data -- Documentation on the atomic reference data
autocorr -- Autocorrelate an image.
autoidentify -- Automatically identify lines and fit dispersion
autospec -- Fit model components to a list of input spectra
average -- Compute the mean and standard deviation of a list
avgvel -- Evaluate average velocity for one pixel
avshift -- Averages the shifts measured on the 4 WFPC chips.
awcspars -- Default image wcs parameters
axispar -- Specify axis and scaling parameters (pset for 'sgraph')

Help Form · STSDAS
Maintained by the Science Software Group at STScI
This file last updated on 28 May 2003