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Hello astro community I am looking for a solution to correct some nasty bloated star halos visible in the S2 data of the Heart Nebula. Data was shot in a Bortle 8 heavily light polluted site using a Chroma 3nm filter - 300s Bin 1x1 - ZWO 6200mm Tried several configurations of Star Exterminator but could not get rid of the halos Used WBPP in Pix to stack frames. I cannot detect any star defects in any subframes and my Ha & O3 stacked data came out fine using the same WBPP parameters. Any insight into what is causing this and how to correct or avoid in the future would be greatly appreciated. Heart S2 - 1.jpgHeart S2 - 2.jpgHeart S2 - 3.jpg |
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| You got the wrong stacking/normalization parameters but what I cannot tell unless I see the log file. |
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look like humidity , i have the same setup zwo 6200mm pro and Chroma LRGB and SHO 3nm , in south Florida , usa we have a Hight humidity , One night I forgot to turn on the dew ( camera ) and I had a similar effect on the stars, which does not seem like a halos to me caused by the filter, in fact it is one of the few brands that do not have halos, the next time stop and check out all optical train , looking for some humidity ps : all star with halos not make sense |
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Hi, maybe this helps (though it’s in spanish): https://m.youtube.com/watch?v=5BzIUEuBV2A |
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Hi, You may try shorter exposures. I have the same problem with a doublet. Philippe |
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| Not sure if it would help but you might try Blur X with an aggressive halo setting. Worth a try. |
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| Hi, with the script "GAME" it is very easy to remove star haos |
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Martin Mutti: Hi, please elaborate, what script are you talking about? do you have any link to read more about it? CS Sabine |
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Hi, http://www.skypixels.at/pixinsight_scripts.html https://telescope.live/blog/using-game-script-create-mask-pixinsight |
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You cannot remove these halos with AI sharpening or scripts. They look like bad integration of frames and are probably artifacts. Did you drizzle? What were your parameters when you integrated? CS, Bogdan |
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Agree with Bogdan, looks like processing artifacts. Process of elimination simplify WBPP. Stack without darks and/or lights, turn off normalisation in lights, reset all WBPP parameters etc. etc. Check all subs as a video and frame by frame using blink. Good luck Alan |
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| WBPP - 1.jpgWBPP - Image Integration.jpgWBPP - Image Registration.jpgWBPP - Local Normalization.jpg |
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Upon closer inspection in the Blink process it appears to be site condition or possibly equipment relatedBlink 1.jpgBlink 2.jpg I will remove the bad subs from the integration Thanks everyone for your input |
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Hi,please elaborate, what script are you talking about? http://www.skypixels.at/pixinsight_scripts.html Siegfried |
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The blink1 image you posted looks like you have poor focus. I would exclude those subs from the stack and redo the integration. As others wrote before, the problem is in stacking, so it should be fixed there, not in post processing. cs, Wim |
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| I just had something similar to this occur. A handful of shots were coming out with the center stars like this, I realized I didn’t turn on the antidew on my cam. A couple shots after I turned it on the stars were sharp again with no halo/glow. |
