I used a 180 Mak with a 2X Powermate feeding an f30 beam into a Solar Spectrum 0.5Å filter with a ZWO 290 for the following image. I used an off band setting and saw a weird mottling effect. I don't think it's noise since the mottles
are different sizes and shapes. Any ideas what they might be?
Lou
https://www.deviantart.com/giovannigabr ... -881359658
Set up used:
The filter is attached to a temperature controller with a thick grey cable. I decided to construct a cradle (in wood for now) so that the controller rides the scope. This unclutters my table a bit. The white screen is meant to shield the controller from direct sunlight. Yes, that's a can of tuna on the counterweight shaft to refine the balance.
https://www.deviantart.com/giovannigabr ... -881360332
A peculiar effect around a sunspot on June 1
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Re: A peculiar effect around a sunspot on June 1
Looks like photospheric granulation to me.
This would be sensible since you are off-band (by how much?).
Cheers.
Peter
This would be sensible since you are off-band (by how much?).
Cheers.
Peter
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Re: A peculiar effect around a sunspot on June 1
Your basically starting to get into the photosphere. What your seeing is convection cells starting to bleed in from the very top part of the photosphere.
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Re: A peculiar effect around a sunspot on June 1
I agree with the above, in the wings of Halpha you are right at the base of chromosphere and top of the photosphere it looks like granulation cells
Alexandra
Alexandra