On Mar 17, 7:43 am, Dave Typinski wrote:

I have run into a few older papers that have some angular measure
notation with which I'm unfamiliar.

For example, 0.'25 and 0."25, with the quote marks directly over the
decimal point in each case.

I suspect that these denote 25 arcmin and 25 arcsec respectively, but
I'd like to be sure about that.

I'm almost certain the correct interpretation is 0.25 arc-minutes
(i.e., 15 arc-seconds) and 0.25 arc-seconds, respectively. I don't
know where you might find a definitive reference to resolve the
confusion, but I've seen this notation used on occasion, and I'm
fairly sure that's how it works.

Are there any examples listed in the papers that you might compare
to known values as a sanity check?

-- MC --