V2.1-5

• The way POLBIN chooses the location of its bins has been changed. The bins are now chosen so that origin of the (X,Y) co-ordinate system (as defined by the X and Y columns in the input catalogue), is always at the corner of a bin.

• The WCS information stored with the output cube created by POLCAL now has three axes instead of two (the Stokes axis is now described in addition to the two spatial axes).

• A new parameter called TRIMBAD has been added to POLCAL to enable the output cube to be trimmed to exclude any borders of bad pixels.

• POLBIN and POLVEC can now optionally add RA and DEC columns to their output catalogues, so long as suitable WCS information is available. See the new parameter RADEC.

• The WCS FrameSet stored within catalogues by POLBIN and POLVEC now include a GRID Frame describing the grid co-ordinate system of the Stokes cube.

• POLPLOT now allows the key to be placed inside the vector map by giving a negative value for the KEYPOS parameter. The text included in the key can be specified using the Title attribute of parameter KEYSTYLE.

• The default vector scaling used by POLPLOT has been improved in cases where debiassing causes many zero length vectors to be present.