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.

[Ian]

I noticed mate...

The reason I mentioned you in particular is your previous interest in astrometry. I think your main issues you've had with it was not having a reasonable starting point for the engine to work from.

Unless of course, you've got it sussed and not told me

[Fay]

Didn't know there was a RAW files part in the gallery

[Rick]

See http://forum.orpington-astronomy.org.uk/index.php?topic=3366.0 and http://forum.orpington-astronomy.org.uk/index.php?topic=2501.msg15190#msg15190

[mickw]

Having made a complete hash of modifying my previous post -
Munstermans image rotated a bit better, Fay's image cropped to a similar size




Why don't these images appear in the post ?

[Rick]

Your links point to the pages on picasweb.google.com rather than to the actual images, and you've linked them as URL= rather than IMG= too...

[mickw]

Thanks for that Rick

I now remember that I posted the instructions how to do this for someone else 

[Fay]

Ian, I have put, I think, FITS info of one of the Firework images, in the appropriate section of Gallery, I think. Hope this is what you want.

Fay

[Ian]

I was hoping for the whole fits, including the image data

[Rick]

Yeah, all it's showing is the FITS header. Was that what you uploaded, or has the gallery thrown the rest away?

[Fay]

I will do the image Rick. I was not sure how to select it, with the correct address, from my pc.

[Rocket Pooch]

But nice pic either way Fay.

Personally I don't think this is up to Fay's normal standards now, Fay you must try harder!

[Fay]

I know. I was never too struck on the Firework. But I reprocessed making the stars not so bloated. THen I read that it is a very difficult galaxy to see & then I was reading about the large amount of supernovae that occur there & thought that I may have one in the image. I have yet to succeed in uploading it as a fits from my pc.

Fay

[Rick]

...and I think the .fit upload problems have been resolved now.

[Fay]

Well done Rick