NGC 6946 redone Firework in Cepheus

[Fay]

I was reprocessing this image & read that it is very difficult to see, even with pristine sky & 8" you would only see the nucleus Apparently there are 3 supernovae in this image, If I have got them. I am not sure where they are, as this image in in a different position & there are so many stars they are difficult to pinpoint, although I think they are quite large. 

[Fay]

Did not put the image on that has the supernova marked, as I was not sure If I was allowed to do that.

[Ian]

why not?

[Fay]

Well I was thinking of copyright

[Ian]

if in doubt, link to it or post it with a full credit. Unless it's content that you've paid for, or feel someone may have paid for it, in which case post a link to the site where it can be bought.

Rick and I are always on the lookout for dodgy stuff (unintentional of course) anyway

[Fay]

Ok, this image is from Munsterman's Universe & I am not sure if it is highlighting 1 or 3 supernovae

[Fay]

I am thinking that it is only the one highlighted on the left. It happened 10 mill. years ago & was discovered by Stefano Moretti 22/09/04

[Ian]

I would have thought the SN would have long since faded. But nice pic either way Fay.

by the way, I modified your post to link to Munsterman's site.

[Rick]

Orientation is the key when you're trying to compare two images with as many stars as that. Any ideas which way's North on those images?

The Supernova Stefano Moretti discovered in 2004 (SN2004et) has long-since faded. There's a long list of images of it (including a pre-discovery image which shows that it might have been discovered a few days earlier if anyone had been looking!) here:  http://www.rochesterastronomy.org/sn2004/sn2004et.html

Se also: http://www.theastronomer.org/supernovae.html

[Fay]

I am thinking the image is upside down & back to front. Oh so that's a shame, as it's a very active area, It's possible that there are some more in the image. Thanks Rick   

[Mike]

[Mike]

No still not right

[Fay]

I found it difficult to get it the same as well.

[Ian]

Mike, have you tried Maxim's astrometry on it? You'd need to be accurate with a position in the fits header as a starting point though.

Fay, can you put a fits up in the raw files part of the gallery?

[Mike]

I haven't done anything with it. I just put Fay's and Mick's images up next to each other.