[AZ-Observing] Re: Vekol Fun

At 01:48 PM 1/19/2004 -0800, Joe Larkin wrote:

>...few nice pairs and a few with interesting shapes. Of particular note
>was the galaxy group dominated by NGCs 1400/1407. These two had a
>half dozen other galaxies within a degree or so. I don't know if this
>group is a real cluster or just a coincidental grouping...


Joe,

Megastar (and other software, I'm sure) gives measured radial veloties in
the dialogue boxes for galaxies.  One would expect galaxies in a group to
have similar velocities.  Here are some bright galaxies in a 1-degree field
with NGC 1400/1407 and their velocities in km/s.


NGC 1400    1762
NGC 1407     558

NGC 1383    1978
NGC 1391     --
NGC 1394     --
NGC 1393    2185
NGC 1402     --


It looks like NGC 1407 is well in the foreground of the other galaxies.
There's not enough information from just the redshifts given in Megastar,
but maybe NGC 1383 and NGC 1393 are in the same group with NGC 1400.

Tom



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