The goal here is to make a publication quality image of the sky with the coordinates labelled in the standard Right Accession/Declination units. As this is not entirely trivial, here are some notes to help:
Use the PGTBOX function which knows how to label the coordinate box in time units
The options to the RA (normally horizontal) axis should include:
The options to the Dec (normally vertical) axis should include:
I additionally also include:
The coordinate system for Right Accession axis should be in seconds of time (240 seconds/degree). The coordinate system for Declination axis should be in seconds of arc (3600 seconds/degree).
When calling PGSWIN remember that the RA axis is decreasing! So the first element should be larger than the second in call the PGSWIN (assuming RA is the horizontal axis)
Ensure that the matrix representing the coordinate system of the image is correct when calling PGIMAG