Search found 61 matches

by szymon
Thu Jul 18, 2019 9:18 am
Forum: General Discussion
Topic: Flats & noise propagation; who's up for an experiment?
Replies: 12
Views: 6355

Re: Flats & noise propagation; who's up for an experiment?

I am so in! Am just working on data from the eagle nebula where I have a number of different sets of flats (and I think I used the wrong ones when stacking originally). I'm going to get it "properly" stacked in DSS, but I would love to also see if ST can do a better job :-)
by szymon
Tue Jul 16, 2019 9:17 am
Forum: Image Processing Troubleshooting
Topic: My first Narrowband Image
Replies: 16
Views: 5305

Re: My first Narrowband Image

This was taken over two nights, again there is not much data, but it's taken with Gain set to 400 (which should be close to "unity gain"). It's not binned from the camera, but I was able to bin 25% in StarTools -- it seems to me that StarTools is basically doing the same as camera binning, but is mo...
by szymon
Tue Jul 16, 2019 9:14 am
Forum: Image Processing Troubleshooting
Topic: My first Narrowband Image
Replies: 16
Views: 5305

Re: My first Narrowband Image

Is this dataset any cleaner? Ha: https://www.dropbox.com/s/b908pmkkkqg0ued/final_ha.fits?dl=1 Oiii: https://www.dropbox.com/s/i69nl2apbw790s8/final_oiii.fits?dl=1 I need to reprocess it but this is what I did quickly last night: https://scontent-lht6-1.xx.fbcdn.net/v/t1.0-9/66655899_1015738861298453...
by szymon
Tue Jul 16, 2019 1:52 am
Forum: Gallery
Topic: M16
Replies: 0
Views: 806

M16

The Eagle Nebula (M16), featuring the "Pillars of Creation". First quick bicolour process before bed (StarTools is really good at getting good results fast if you have good data!). I only have a narrow window before M16 goes behind a tree, so I am limited in the amount of imaging time. This data was...
by szymon
Mon Jul 15, 2019 5:18 pm
Forum: Image Processing Troubleshooting
Topic: My first Narrowband Image
Replies: 16
Views: 5305

Re: My first Narrowband Image

Ahh forgot to mention my scope is a lot slower than yours, an 80ED at f/7.5. That will also likely increase necessary sub length. NGC6960, the Witch's Broom Nebula, also known as the Western Veil Exposure: • Total Lights 2 hours 15 minutes • 3 x 900 seconds each of Ha, Oiii, Sii • 20 Flats individua...
by szymon
Mon Jul 15, 2019 5:12 pm
Forum: Image Processing Troubleshooting
Topic: My first Narrowband Image
Replies: 16
Views: 5305

Re: My first Narrowband Image

I live in London, England, known fondly to those of us who astroimage as “LPLondon”. The light pollution is basically at the levels of Victorian Smog. My back garden is Bortle 8. I do not have Dark Skies. That said, this is why I have 7/6.5nm narrowband filters, so that I can ignore the light pollut...
by szymon
Sun Jul 14, 2019 7:24 pm
Forum: Image Processing Troubleshooting
Topic: My first Narrowband Image
Replies: 16
Views: 5305

Re: My first Narrowband Image

Those are wonderful results -- especially the last one! I don't suppose you have a beta program for people to test the latest latest bleeding edge v5? Happy to send my qualifications if you're interested, I believe I could provide useful input and am happy to keep pulling in updates and won't compla...
by szymon
Sun Jul 14, 2019 1:40 pm
Forum: Image Processing Troubleshooting
Topic: My first Narrowband Image
Replies: 16
Views: 5305

Re: My first Narrowband Image

Another competitive rendering of just the Ha/Oii data: https://scontent-lht6-1.xx.fbcdn.net/v/t1.0-9/67291847_10156706324222746_5856609390416625664_o.jpg?_nc_cat=101&_nc_eui2=AeHX9v2hqB0kq8zXHwDVRttAapiCHgMmDC_LTEz6LgVnw0okQ74fbbaWskYEjSeLiRXE7IWIjfRuln3n-vU79nG6K8HGRC5eeGEOrPqXVlPEow&_nc_oc=AQlB508...
by szymon
Sun Jul 14, 2019 1:40 pm
Forum: Image Processing Troubleshooting
Topic: My first Narrowband Image
Replies: 16
Views: 5305

Re: My first Narrowband Image

This is what "the competition" does with the Ha/Oiii data: https://scontent-lht6-1.xx.fbcdn.net/v/t1.0-9/66481004_10156706308057746_7419099818183622656_o.jpg?_nc_cat=109&_nc_eui2=AeHIsMwfk8UKoIpTs5rLr7xTaDyTyqduaDRC3o1RS2dMizJN-fLBZYcGuOWhSnTJ2BnFiAhk31hAThjk6CskBKon0UCS7oP4bLCP9h4-Z4YYeA&_nc_oc=AQk...
by szymon
Sun Jul 14, 2019 1:36 pm
Forum: Image Processing Troubleshooting
Topic: My first Narrowband Image
Replies: 16
Views: 5305

Re: My first Narrowband Image

Doh! I mispasted the link, apologies! It's https://www.dropbox.com/s/zbqva3r3turj91j/Sii.fits?dl=1 (have also edited the first post).