Seyfert galaxy NGC1808

[Geoff45]

I took this one in November at Wiruna--a difficult one to process as it turned out. Probably too short an exposure.

https://www.astrobin.com/wmwk0e/

NGC 1808 is a Seyfert galaxy located in the constellation Columba. The galaxy has an unusual warped shape. Most spiral galaxies are flat disks, but this one has curls of dust and gas at its outer spiral arms (upper right-hand corner and lower left-hand corner). This peculiar shape is evidence that NGC 1808 may have had a close interaction with another nearby galaxy NGC 1792 ( not in the picture)

Details

Telescope: 12.5" PlaneWave CDK
Camera: FLI Proline 16803
Mount: AP900
Exposure:3 hours LRGB
FOV: 27' x 27'
Acquisition: MaximDL
Processing: PixInsight.

[strongmanmike]

Very nicely composed Geoff, it's a lovely galaxy, I shot her in late November too :) (my last image :sadeyes:). I particularly like the dust antennae rising from the core of this one as well as the great selection of background galaxies :thumbsup: Perhaps you could get a little more blue into it but that's just a suggestion (I do have a penchant for blue, I know :scared2:) it looks just a tad brown/yellow to me :confuse3:

Mike

[Geoff45]

Thanks Mike
Yes, I saw your pic with the blue. I experimented with a bluer look, but I wasn’t convinced it was the right way to go. Have a look at a couple of apod pics here https://apod.nasa.gov/apod/ap980701.html
and here
https://apod.nasa.gov/apod/ap980323.html
Lots of brown.

On another matter. Have a look just below the bright star on the lower left. There is a little group of galaxies and a longish linear streak. I wonder if you know what it is?. It’s not an artefact. Have a look at your image. It’s there too.

[strongmanmike]

Hey maybe you're right t'was just a suggestion :thumbsup: I don't think either of those examples you linked to are RGB images like we amateurs tend to do though..?

Mike

[gregbradley]

Nice image and I am surprised you got the outer ring so clearly in just 3 hours.

I agree with Mike its too yellow/brown, you can see it in the surrounding star colours.

One of the NASA pictures talks about the blue in the core.

Here's my 9 hour + effort and looks like I could get more out of the processing but this is what I got:

https://pbase.com/gregbradley/image/154574611/large

Greg.

[Geoff45]

Thanks Greg. You may be right about the colour. I often deem to have a bit of trouble getting the blues out. The QE for the Proline is lowest in the blue, so I often take more blue subs to compensate, but time didn’t allow me to do it this time. Maybe next season.

[Placidus]

Very nicely done Geoff. A particularly good result for 3 hours. (It's been very hard to get much more than that this summer). Oh to have a side-on view.

We also spotted and were intrigued by the linear streak seemingly attached to the lovely little edge-on spiral toward bottom left. Another rather irregular galaxy? tidal tail? The one causing the other? If the streak is from a small Magellanic galaxy, it must be much nearer than the edge-on one, in order to appear so large, and therefore just a lucky superposition.

[Paul Haese]

Great result for the short integration. Colour in my opinion is as other have stated, maybe just a little yellow. However, the detail is good and the back ground galaxies are interesting to discover within the field.

[codemonkey]

Nice one Geoff; one of my favourite galaxies... could do with some more time on it, but you know that already.