[Aavso-photometry] M67 in color

[Brad Walter]

Try imaging a Terzan cluster some time. I don't think you'll find
anything that looks even close to blue in the cluster, e.g. 

http://www.angelfire.com/id/jsredshift/obscure.htm

-----Original Message-----
From: aavso-photometry-bounces at mira.aavso.org
[mailto:aavso-photometry-bounces at mira.aavso.org] On Behalf Of Michael
Koppelman
Sent: Sunday, February 20, 2005 8:13 PM
To: Tim Hager
Cc: aavso-photometry at mira.aavso.org
Subject: Re: [Aavso-photometry] M67 in color


It looks like he may have set the colors to be roughly astrophysically 
accurate! Usually the pretty picture guys make clusters way too blue 
because it looks better.

Nice photo.

Michael

On Feb 20, 2005, at 5:44 PM, Tim Hager wrote:

>      Rob Gendler has just posted a beautiful color image of M67 on his

> website at: http://www.robgendlerastropics.com/M67.html .  If it 
> doesn't ring a bell for you, this is the cluster that many of us of us

> use to calculate our transformation coefficients each spring.  Now you

> can really
> see that those stars do have different colors!  Note especially the 
> bright
> red and blue pair to the lower right of the "dipper asterism".  It was

> fun
> for me to dig out the color indices of the cluster stars and compare 
> them to
> what they look like in Rob's image.

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