Strange angular measure notation?

Hello all,

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.

Can anyone confirm what this notation is supposed mean?

Thanks!
--
Dave

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 --

On Wed, 17 Mar 2010 10:43:07 -0400, Dave Typinski
wrote:

Hello all,

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.

Can anyone confirm what this notation is supposed mean?

Thanks!

I think it means a decimal fraction of a minute of arc or a second of
arc.

Bud

On Mar 17, 8:43*am, Dave Typinski wrote:
Hello all,

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. *

Can anyone confirm what this notation is supposed mean?

I would have thought that these would mean 1/4 of an arcminute and 1/4
of an arcsecond respectively. I know I've seen it used in that sense.

John Savard