Ghost of Cassiopeia in HST palette

[Paramount]

Hi
This subject is very rarely imaged in the full narrow band palette as there is virtually no OIII and little SII compared to the Ha. It is more common to image it in LRGB or HaLRGB combined. I have done the latter but I wanted to see if there was anything that could be done with just the traditional narrow band filters. The OIII signal is so weak that it has to be stretched just to be able to see it. But, it is there, it just requires enough data and time and patience to tease it out. This is a total of almost 15 hours exposure time with 4.5 hours Ha and 5 hours each of OIII and SII and it has taken me three goes at processing before I was happy with the result. It was taken with the Televue NP127is/FLI-Atlas-Centreline-PL16803 prototype imaging system that I am testing. This is a crop of the full image to show the detail better and make the image size easier to post. The full size image can be seen at the following link
http://ic2.pbase.com/o9/29/869929/1/153 ... HSTmax.jpg
Thanks for looking
Best wishes
Gordon

[Clifford60]

Really like a ghost, very nice. Thank you for sharing

[lqx]

Very nice detail!

[Gary]

Hauntingly beautiful!