CG4 NGC2427 TEC110fl repro

[gregbradley]

Here is another image I took over the Christmas break at my dark site observatory.

HaLRGB 120 30 40 30 40 for 4 hours and 20 minutes total. All subs are 1x1 except luminance.

CG4 is the dusty demon looking object and NGC2427 is the small galaxy that looks like its being eaten by CG4.

TEC110FL, FLI ML8300, PMX Mount, MMOAG guiding with Lodestar.

http://www.pbase.com/gregbradley/image/140969423/large regular


http://upload.pbase.com/image/140969423 Large

Greg.

[atalas]

Nice work Greg,very different to what I've seen of this object with this wide field view.

[Stevec35]

Nice one Greg although the colour isn't quite what I expected. Most versions I've seen have a lot more blue but I'm not saying it's wrong. I've often wanted to try this one myself but never had the opportunity.

Cheers

Steve

[gregbradley]

Thanks Louie. I've done a light repro of this one as I agree with Steve it does seem a bit reddish. I 've gotten it to be more of a magenta/red which is closer to what I have seen before and certainly what my data is showing.



Thanks Steve.
I think the colour is a bit too much in the red. I have done a repro and it is more the muted magenta that is often shown.

Here's an image of it I did a few years ago with a BRC 250 and either Apogee U16M or Proline 16803

http://www.pbase.com/gregbradley/image/108067018

Greg.

[LightningNZ]

Love the repro Greg! Crazy colours in the main nebula. Looks like some ghosty is reaching out to pluck the galaxy! Very cool.

Cheers,
Cam

[Stevec35]

Hi Greg

You aced it this time. The repro looks much better.

Cheers

Steve

[Paul Haese]

Big field of view and a rather large object. I don't suppose you considered a composition a little to the left to capture a larger galaxy? How long were your subs?

I like that smokey look of the nebulosity, it gives a 3D feel to the image.

Looks like you have similar reflections on your brighter stars as I do, albeit that yours are a little more diffuse than mine. There are large halos around those stars and I am assuming this is reflections?? Do you think your sub lengths influenced the size of those halos?

Interesting object and one that I will have to take a look at sometime in the future. Thanks for posting.

[gregbradley]

It is an odd object and also rather faint.



Thanks Steve.



Yeah those halos, I don't think they are reflections I think there was a bit of high cloud when I did the rgb shooting. There was one night where there was a bit of high cloud around for a while. Its not in all the subs only some. I didn't notice getting reflection halos at all with this setup.
There may be some bloat that comes from the fast scope and the small wells but even then I didn't really notice much. I think that occurs more with my TEC180 and the fact its both fast and large aperture.

By the way Paul I got red ringing on the brighter stars in the initial colour combine. I checked the FWHM values on the same star in all masters and the red was bloated for some reason. Perhaps the seeing was bad for a bit. I did deconvolution 30 iterations, positive constraint only on the red and it brought the FWHM slightly under the others. I did a new combine and no red ringing so that technique works well.

Greg.

[atalas]

Yeah,I like the repro Greg...bit more dust lifting up as well.

[strongmanmike]

Yeh it's a cool object that CG4 huh? Interesting colouring you went with, very red...:). I think this object needs lots of exposure it's pretty faint.

So Mr prolific imager, how much more data do you have left sitting on that Hard drive of yours from the Christmas New Year period? ;)

Mike

[gregbradley]

Thanks Louie. It would have been better to do a 8 or 12 hour job on this one and that way the natural LRGB colour could come through more.



It really is a long exposure object. The LRGB is a bit more purply bu too faint. But then of course Ha pushes it towards the red. Same story as with most images - long exposure is the way to go.

I have a couple left over still.

Greg.

[Fabiomax]

Beautiful Greg, I notice that you took the time to really capture a lot of signal. I really like.
Cheers,
Fabiomax

[Ross G]

Great photo Greg.

I love the smooth, rich colours.

Also, another new object for me.


Thanks.

Ross.