Got another shot at C/2023 A3.
I do not have much experience with DSS, as far as I know the result should be very similar. „Lights“ is the term for a single exposure. The technique is basically the same no matter which software you use.
But if you have Siril specific questions feel free to drop any questions :)
It‘s hard to tell from your image, bit it appears you can even get a bit more details if you register your lights onto the comet itself and then stack all the images. I used Siril for the two step registration process.
But nice image nonetheless!
Cool thank you!
Lets see what the next days will bring. As the comet rises higher maybe it will be even more visible.
Your image looks not to bad either. On my phone the comet looked the same like yours.
Thanks for answering! Yes the comet moved quite a bit, but I stacked two images. One for the stars and one for the comet were I registered the images onto the comet itself. So the stream seems to be a real feature of the comet.
The comet is also visible on one single exposure as it is very bright. It was also visible to the naked eye. But stacking reveals even more details because it improves the signal to noise ratio. Also stacking helps removing unwanted objects like satellite trails, planes or moving clouds.
We got extremely lucky and got a tiny window of cloudless sky in an never ending sequence of cloudy nights. Also the conditions were a nightmare with severe light pollution and lights shining directly at our equipment.
And maybe somebody here can explain to us what the ionized gas is that 'shoots out‘ in front of the comet?
Also do the colours seem to be correct? We tried our best at background extraction and maintaining the true colour, but the raw data was of poor quality. From images of other comets the dust tails normally seems to have a yellow/orange colour and only the plasma tail is blue.
Edit: found the answer to the Anti-tail. It shows the trail of dust were the comet has traveled, which appears to come out at the opposing side because of earths angle relative to the comet and sun.
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More details: https://telescopius.com/pictures/view/202996/deep_sky/ngc-1456/pleiades/by-maxi_franzi
Thanks!
We really struggled to combine RGB with Ha. For our first try at continuum subtraction however we are very pleased.
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Full resolution and more details: https://telescopius.com/pictures/view/202859/deep_sky/ngc-206/m31-andromeda/by-maxi_franzi
I use uYou plus. It has to be installed via Altstore (which means you have to resign it once a week with a computer needed in the same network).
But it has the best features:
Thanks for sharing! The software worked better than expected on your image!
On my research before purchasing the program I also stumbled over your linked forum post. However I found it very misleading, as the software does not generate details learned from other images but only works with data already in your image. As it is a deconvolution tool results can deviate slightly from the true nature. But that has little to do with AI being used here. I needed a whole semester at university to truly understand the maths behind it. My biggest problem is that the software isn't open source so one can't look into all the details. But there are already people working on open alternatives.
But this already is a very specific problem, don't forget that the biggest difference for good quality makes the data itself. I wish best of luck on your journey!
Oh and I forgot to mention that one other advice I would give is to search the darkest location to shoot from that you can access. Lightpollutionmap really helps with finding such places.
Edit: unstreched file with only background extraction and deconvolution: https://drive.proton.me/urls/QD4870ZMF4#uyVBYxKgWxgb
For untracked this looks not too bad. To improve I would do the following:
Are you interested in sharing the raw stacked file? I use a (paid) deconvolution tool called BlurXterminator and I wonder if it can handle such extreme star shapes. If it works I will of course send you the file.
M31 shot only in Ha and OIII.
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We shoot this image over two nights to reveal the faint structures of the veil nebula complex.
Shot with a 135mm lens and a Fuji X-T5.
We finally got two clear nights and although the moon was really bright, this target came out quite well due to the narrowband filter.
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Full resolution and more details: https://telescopius.com/pictures/view/198606/deep_sky/ngc-6974/veil-nebula-complex/by-maxi_franzi
~~We got a lucky shot of Andromeda with a meteor crossing our view.~~ Apparently we shot a satellite flare next to Andromeda.
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Although the seeing was not great we managed to get our first shot of the region around Sadr.
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Full resolution and more infos: https://telescopius.com/pictures/view/192523/deep_sky/crescent-nebula/NGC/6888/diffuse-nebula/by-maxi_franzi
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Full resolution and more info: https://telescopius.com/pictures/view/192387/deep_sky/omega-or-swan-nebula/M/17/diffuse-nebula/by-maxi_franzi
Ah ok, so I assumed you registered all your light frames onto your stars as your stars look very sharp. And that’s the normal way for every astro image you would normally do. A comet however moves so fast that its position changes even in the short time frame were you took the images.
So after registering all the images with the stars pattern you want to make a second registration were you mark the position of the comet on the first frame and on the last frame. With that now all images are aligned onto the comet and now the stars appear to move in the background. As your stars look so sharp I assumed you didn’t make the second registration. In DSS there is a comet mode for that but I haven’t worked with that so I can’t tell you about the workflow with that program.
Hope that helped in any way!