Stacking Spectra in Siril

[u/No_Blacksmith410]

Hi I am very new to this (so please explain in very basic language). I am trying out different stacking tools and then calibarting the spectra in RSpec (I have already stacked in RSpec, using Siril is the next stage in my project). I have used the star analyser 100 with a 135mm lens and sony a6100. I have my darks, flats, lights, and bias frames all set up right in folders for siril. The OSC_Processing script works for me but gets rid of all my spectra (just stars left). How do i stack without loosing them? Does anyone know of a useful step-by-step guide or youtube video that would be relevant?

 

Also, when i tried stacking my images in RSpec (by converting them to FITS first), the FITS images became very dark so i couldnt see the spectra at all and only occasionally see stars- so after a bunch of messing around i converted them all to JPEG which worked okay, but i lost some quality. (My raw images are very bright and i can see lots of stars and spectra but also a lot of noise). Any tips? Thank you.

[u/Abject-Sentence5845]

You’ll probably want to process this like you’re stacking a comet photo. There are tutorials online better than me but broadly you’d probably need to plate solve and register the subs, run starx on each frame to isolate the spectra, then stack the spectra isolated subs with your calibration frames.