Hi,
that depends on what you mean by 'replace'. It's an -additional-
catalog. I'm not removing my HST GSC just because I added the UCAC3. I
still have UCAC2 and USNO as well. It all depends on what other people
use. If someone sends you some event relative to an HST GSC star UCAC3
is useless and vice versa.
It seems that UCAC3 is a 'better' catalog than HST GSC but that depends
on your requirements. Besides, UCAC3 is so new that we may found out
more problems with it in the next few months.
Sander
babarosa6 wrote:
>
>
> Hi!
>
> I have a (maybe sheepish) question:
>
> Am I right that UCAC3 catalog replaces HST GSC catalog because of the
> more precise magnitudes of UCAC3 (the limiting magnitude is fainter
> with ~m16.5 anyway)?
>
> Installing and using it with skychart_3.1-1232_i386.deb works fine.
>
> Greetings
> Michael
>
>
