CCAPP's Paul Martini sends greetings from the LBT
2007
To the left is a color composite of last month's observation of Abell 611, created by combining all of the u,g,r data and the strong, blue arc near the cluster center looks absolutely spectacular.
Details: the image is about 2 arcminutes on a side, North is up, East is to the left. The integration times were 20min in Uspec, 60min in g-SDSS,and 15min in r-SDSS. The image quality in the combined images is about 0.6" FWHM in g and r, but they were smoothed them to match the 0.7" image quality of the u-band image. Click on the image for a large view.