The call-back should read the entire contents (header and data) of the binary table in the named extension of the external FITS file, storing the contents in a newly created FitsTable object. It should then store this FitsTable in the FitsChan using the astPutTables or astPutTable method, and finally annull its local copy of the FitsTable pointer. If the table cannot be read for any reason, or if any other error occurs, it should return a non-zero integer for the final (third) argument.
If "tabsource" is NULL, any registered call-back function will be removed.
AST A Library for Handling World Coordinate Systems in Astronomy