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RE: [APML] M13



Tony, all my CCD shots (from the dark side) of globulars have basically blue stars with orange super giants swarming around.  Here is an example: 
 
http://www.psiaz.com/Schur/astro/ccdimagepages/m5.html
 
and
 
http://www.psiaz.com/Schur/astro/ccdimagepages/n5897.html
 
I hope I have not offended anyone by putting links to these CCD images here. 
 
Chris Schur
 
 
 
 
 
-----Original Message-----
From: owner-astro-photo@seds.org [mailto:owner-astro-photo@seds.org]On Behalf Of Tony Hallas
Sent: Tuesday, June 11, 2002 7:41 PM
To: astro-photo@seds.org
Subject: Re: [APML] M13

Hello again,
 
     Someone has wondered why there are so many blue stars if a globular is supposed to be made up of only very old stars... really good question. First, my RGB color is "locked in" until it gets to PS as a 16 bit Tiff file so there is no way that I can think of where the colors could be altered. I checked Bill Fletcher's tricolor shot on his web site that he took with a 16" f/4.5 scope and where his stars are not washed out, they are blue, so does anyone else have a reliable tricolor shot of M13? Maybe the idea that a globular is made up of only old stars is suspect... would like to hear some feedback on this one if anyone else has taken tricolor that is not saturated. 
 
    Tony