Table A.2
Available model components (Y = YES; N = NO).
| Package | Delta | Disc | Gaussian | Ring | Bubble | Sphere | Expo | Power−2 | Power−3 |
|
|
|||||||||
| casa (uvmodelfit) | Y | Y | Y | N | N | N | N | N | N |
| aips (uvfit/slime) | Y | N | Y | N | N | Ya | N | N | N |
| difmap (modelfit) | Y | Y | Y | Y | N | Y | N | N | N |
| miriad (uvfit) | Y | Y | Y | Y | Ya | Y | N | N | N |
| gildas (uvfit) | Y | Y | Y | Y | Y | N | Ya | Ya | Ya |
| UVMULTIFIT | Y | Y | Y | Y | Y | Y | Y | Y | Y |
Notes. delta refers to a point source; disc to a uniformly bright disk; ring to an infinitely narrow ring; sphere refers to an optically thin uniform filled sphere; bubble to a uniform spherical surface; expo refers to an exponential radial decrease; power− 2 refers to a radial, r, decrease like 
(in this case, the fitted flux is the integral from r = 0 to r = r0); and power− 3 refers to a radial decrease like ∝ (1 + (22/3 − 1) (r/r0)2)−3/2.
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