Like so many other images posted to this website, this is absolutely excellent work. To make a comparison, I looked at the original Arp catalog. Actually, it's my photocopy of the 1978 reprint. It is amazing how much more detail you have, and Arp was using a 200-inch. Wonderful! I don't know this area of the sky well enough to answer your question on the stray light processing. Thank you, Bob Gent -----Original Message----- From: az-observing-bounce@xxxxxxxxxxxxx [mailto:az-observing-bounce@xxxxxxxxxxxxx] On Behalf Of Bernard Miller Sent: Friday, May 04, 2012 9:05 PM To: az-observing@xxxxxxxxxxxxx Subject: [AZ-Observing] NGC 4490(Cocoon Galaxy) and NGC 4485 Hi, Here is a pair of interacting galaxies you don't see very often. They have already collided or interacted, leaving each with an irregular shape. It is believed they were both spiral galaxies before their interaction. I have shown the cropped version, but you can click on the link for the uncropped version. There are dozens of faint galaxies in the uncropped version. I also had some stray light in this image and I used a Photoshop technique to fix it. I am curious if anyone can tell what part of the image was fixed. I have never tried this technique before and I am curious to know if it is obvious. http://www.azstarman.net/NGC4490.htm Bernard -- See message header for info on list archives or unsubscribing, and please send personal replies to the author, not the list.