RADECSYS (4)
(4) These eight-character keywords are deprecated; the seven-character forms, which can include an alternate version code letter at the end, should be used instead.
The replacement should be RADESYSa
We use this in the events table, however we use a global header for this. But the FITS standard also mentions keywords to specify this for columns of bintables:
The replacement should be
RADESYSaWe use this in the events table, however we use a global header for this. But the FITS standard also mentions keywords to specify this for columns of bintables:
Where n is the field number