D Release Notes—V1.3

D.1 New Commands

The following new scripts have been added:

mapbyvel

Form a new image from a cube’s voxels using all the data values of a supplied image as the $Z$ co-ordinate in the cube. The supplied image must span the same $X$-$Y$ region as the cube. In practice the cube has RA, Dec, velocity axes and the input image is a velocity map.

pvslice

Extracts and displays position-velocity slice from a (RA,Dec,vel) cube. The slice need not be parallel to either spatial pixel axis, and it is defined using the graphics cursor.

D.2 Modified Commands

The following applications have been modified:

• Internal script checkndf—used in all of the public scripts—now has new options:
  • -d to set the required dimensionality, 2 or 3, where previously only cubes where tested;
  • -p to set the prompt string for the required NDF (that may include spaces);
  • -q (for quiet) to prevent the reporting of the filename and its vital statistics.
• It has also has an improved NDF-validation method, which allows for NDFs within a container file or NDF extension.