## Changes Introduced in V6.0

The following describes the most significant changes which occurred in the AST library between versions V5.7-2 and V6.0:

1. This version of AST is the first that can be used with the Python AST wrapper module, starlink.Ast, available at `http://github.com/timj/starlink-pyast`.

2. When reading a FITS-WCS header, the FitsChanFitsChan class now recognises the non-standard “TPV” projection code within a CTYPE keyword value. This code is used by SCAMP (see www.astromatic.net/software/scamp) to represent a distorted TAN projection.

3. The PlotPlot class has been changed to remove visual anomalies (such as incorrectly rotated numerical axis labels) if the graphics coordinates have unequal scales on the X and Y axes.

   - The graphics escape sequences used to produce graphical sky axis labels can now be changed using the new function astTuneCastTuneC.