Early and Ad-free: Sirilic and Siril - Multi-night ANDROMEDA Workflow for 2024
Added 2024-09-24 00:44:59 +0000 UTCNormally my early and ad-free videos are only for Seagull Tier and higher, but I'm making this one early and ad-free for all Patreon members. I already covered multi-night pre-processing with Deep Sky Stacker in this exclusive patreon video when I hit 500 patrons and suggested there would be follow-up videos for other software. And now finally I have one of the follow-up videos completed. In this video, I cover a full, multi-night workflow for Andromeda Galaxy using only free software (Sirilic, Siril, Starnet). Still will have to do PixInsight and AstroPixelProcessor at some point. Be sure to check out the linked resources that go with this video below.
I'm going on vacation for 9 days starting tomorrow. You can still send me messages, but my responses will be delayed. Thanks for understanding!
Clear skies, Nico
Video Resources:
My M31 Data - https://drive.google.com/drive/folders/1UUt-4V-4ERSziLn5-v5TMXIa2vhBbo_A?usp=sharing
Siril - https://siril.org
Sirilic - https://gitlab.com/free-astro/sirilic/-/releases
Sirilic Instructions - https://siril.org/docs/sirilic/
Starnet - https://www.starnetastro.com/
Starnet Installation Tutorial - https://youtu.be/gyOa8eNIVlk
Full Start to Finish Tutorials - https://youtube.com/playlist?list=PLrzbdmripj1cQ4nNQrocsyzlOR8KSG5AX&si=BBhABwICYqoGxXLq
Comments
@GD - Maybe it's a stupid question, but should you also do that to the biases?
Ralph
2024-10-25 19:30:06 +0000 UTCGreat job Nico. I just finished processing an image earlier, but will definitely reprocess with the tips I picked up.
Ralph
2024-10-25 07:00:49 +0000 UTCI have had limited success with Siril deconvolution after Graxpert Background Extraction but before any SCNR/Denoising/Stretching. I use PSF from stars, and generally play with the gradient step size and number of iterations till I see ringing around stars in auto stretch view, then back off a little. It's not BlurXterminator but it works to an extent.
GD
2024-09-26 22:10:26 +0000 UTCVery much needed video as I have to stack two sessions with different flats becasue of a different dust pattern. Everything was working for me unless I went into action mode. Sirilic stopped because I did not have "use symbolic links" on in preferences. So, I decided on a physical copy of files, and it went through. However, the second part did not execute becasue sirilic could not find siril. Hmm, still don't know why. But I copied Sirilic script to Siril scripts folder, made sure the working directory points to Users\Owner\Siril\Work and executed sirilic script from Siril and got .fit file. The fit file requires some crop as the frames from two nights were slightly shifted. So, it works but need to solve the connection sirilic to siril to make the process easier and more transparent. Thanks,
Jan
2024-09-26 15:03:33 +0000 UTCOne could subtract biases from either darks or flats or from both. Probably one subtraction form e.g. flats is sufficient.
Jan
2024-09-26 14:20:53 +0000 UTCAh, thank you Alan. I totally missed that detail. I would have thought that would be on by default. Thanks for pointing that out!
Nico Carver
2024-09-24 20:01:52 +0000 UTCNico, going back to the Process tab in Siriic - the flow chart seems to show that the bias master is created, but nothing is done with it. I was taught to go to the Properties - Flats tab and check the box to subtract bias from flats. When you do that, the Process tab changes the flow chart to show that calibration. Let me caveat that to say I am far from an experienced Sirilic user and could be off base.
Alan May
2024-09-24 19:55:49 +0000 UTC1) I often do that. Maybe I should have this time, but I’m always concerned about how complex I’m making a workflow so decided this was maybe simpler. Not sure if it was the right call. 2) two processes that I’ve tried and never found I could get satisfying results with in Siril are Deconvolution and Noise Reduction. If I was doing this in PixInsight, I likely would have used both as I understand how they work over there. My guess is the Siril developers are still working on those processes to make them better. 3) that’s an interesting idea. I think it may work. Galaxies aren’t my strong suit when it comes to processing. I know what I like them to look like and can usually get there, but I know there are many techniques I haven’t fully explored.
Nico Carver
2024-09-24 13:42:02 +0000 UTCHi Nico, Great tutorial. Love your artistic vision. I for one have been into signal/image processing longer than astrophotography (part of my masters thesis), and am very rigid and mechanical in my approach. Your videos give me ideas. About that, I have a few questions: (1) Why not remove the stars, before changing color calibration and then blend them in later? (2) Do you think deconvolution on the linear image would have helped? Not that the stars look bloated but you ended up reducing them with an inv arcsinh stretch later? (3) Your opinions on applying wavelets on the starless Galaxy? Enjoy your time off. Clear Skies. GD
GD
2024-09-24 06:24:03 +0000 UTCsiril girlies what's up
Maggie Thrash
2024-09-24 01:15:30 +0000 UTC
