ANALYSIS tasks

ALLSKYPLOT

Plot an all sky graticule in a given sky system and plot shapes, markers and or images on that system. (allskyplot.src)

COMBIN

Combine sets to create new sets using mathematical expressions. (combin.shl)

CONREM

Removes continuum from channel maps by fitting a polynomial to the continuum channels. (conrem.c)

CONREMCHEB

Removes continuum from channel maps by fitting a polynomial or a Chebychev series to the continuum channels. (conrem.py)

CORMAP

Check whether there is a correlation between two maps (cormap.c)

ELLFIT

Programme fits an ellipse to an user defined bunch of points. (ellfit.c)

ELLINT

Integrate map in elliptical rings. Write statistics to log file, Ascii file or GDS table. See also: Supplementary documentation. (ellint.c)

ELLPROF

Create an output set with profiles extracted from an input set at positions in subsets that are either 1) defined by ellipses, 2) entered manually or 3) entered with the graphics cursor. (ellprof.c)

FLUX

Program to calculate flux in user defined box. (flux.c)

HISTOG

Program creates histogram of intensities in a set or part of a set. (histog.c)

INSPECTOR

INSPECTOR writes slices through a 3d GIPSY data cube. It overlays radial HI velocities (i.e. 'tilted ring' circular velocities) on velocities in XV diagrams and lets you adjust the tilted ring parameters to get a better fit. See also: INSPECTOR Supplementary documentation. (inspector.src)

MOMENTS2D

Calculate FWHM and position angle of an ellipse, that represents a 2-dim gaussian, using zero-th, first and second moments of a distribution. The program can find asymmetrical features in a data set. (moments2d.c)

OBJECTS

Find and analyze isolated (extended) structures in an image. (objects.c)

points

Automatic point source extractor. Uses a histogram method to determine the zerolevel and the noise in a map. (points.src)

POTENTIAL

Program to calculate the 2-dim gravitational potential map of a 2-dim image. This is evaluating the integral given as Eq. 2-3 in the book Galactic Dynamics by Binney and Tremaine. (potential.c)

PROFGLOB

Interactive estimation of width of global profile. (No fitting involed) (profglob.c)

PYBLOT

Conditional transfer of maps using blotch region. (pyblot.src)

QFIT

Interactive fit of 2-D gaussians (qfit.c)

QPLOT

QPLOT plots an one dimensional slice through a set. (qplot.c)

RADIAL

Derive radial surface density distribution from a 2-dim total HI map using the 'Lucy method'. (radial.c)

RADPROF

Solves the radial surface density distribution from a strip integral of the brightness distribution. USE PROGRAM RADIAL AS FRONT END FOR RADPROF. (radprof.shl)

RANDOM

Generate random numbers from various distributions. Add noise to sets. Write random numbers to an (ascii) file on disk. (random.c)

RECTIFY

Review the geometrical component of a model galaxy by fitting surface densities in (user supplied) tilted rings. (rectify.c)

SHUFFLE

The programme shuffles profiles in a set so that they are aligned on positions taken from another set. (shuffle.c)

SLICEVIEW

SLICEVIEW is an inspection tool for 2d and 3d data sets. It extracts and displays slices under any angle and (for 3-d sets) shows z-profiles/flux at any position. (sliceview.src)

SURFACEFIT

Given values Z at positions (X,Y) and optional standard errors for Z from a text file with data in columns, find best fit parameters for a user given model function F(X,Y) (surfacefit.src)

TRACE

TRACE plots image values at user given positions as function of distance to a plot centre (in 2-d (sub)sets). (trace.c)

VTKVOLUME

simple experimental volume viewer based on VTK (vtkvolume.src)

WCSFLUX

Plot set/subsets from a GIPSY set or slices from a FITS file and annotate those plots with world coordinate labels and or a graticule. Then add shapes in one image. The shapes are copied to other images using their world coordinates. Finally calculate the flux in those shapes. (wcsflux.src)

XGAUFIT

XGAUFIT estimates parameters for multi component one dimensional gauss functions using data in selected profiles. It can use these estimates to fit the parameters to the data in a least squares fit. Output is send to subsets in a set. (xgaufit.src)

XGAUPROF

Fit parameters of a standard Gauss function, a Gauss-Hermite series or a Voigt lineshape to data from GIPSY sets or ASCII files See also: XGAUPROF Supplementary documentation. (xgauprof.src)