Thursday, November 1, 2012
The Wonderful World of Color
Well, Ralf Kotulla, our commissioning working group observer from U. Wisconsin, beat us to it. He took the 27 images, used swarp to align and combine them, and produced this nice color image.
Since we used g, r, and i, and since H-alpha, which dominates the nebular emission, is in the r band, if we had assigned g, r, and i to the colors blue, green, and red, the nebular would have been bright green. Ralf decided to mess with our minds, and so he assigned g, i, and r, to blue, green, and red, respectively. Thus, the nebula is reddish, but the stars tend to be green.
We are working on an "official" version of this, and we'll post it when it's ready, but this gives you and idea of what nice images pODI will produce. Thanks, Ralf.
Posted by Todd at 6:05 PM