Ca K and G band images take on July 1 and 8, 2018

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christian viladrich
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Ca K and G band images take on July 1 and 8, 2018

Post by christian viladrich » Fri Jan 04, 2019 8:42 pm

Dear All,

I still have some images taken on 2018 waiting for processing. Here are some of them. The solar activity was not much higher than now :-(

The seeing was quite good on July 1, 2018 :
Image

Here are close-ups on the chromospheric network and inverse granulation near the center of the solar disk :
Image

Image

An image of the limb was taken with the 300 mm Newtonian and a G band filter on July 8:
Image

Best regards
Christian
Christian Viladrich
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Re: Ca K and G band images take on July 1 and 8, 2018

Post by MalVeauX » Fri Jan 04, 2019 10:29 pm

Lovely G-Band Christian!

Very best,

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Re: Ca K and G band images take on July 1 and 8, 2018

Post by ffellah » Fri Jan 04, 2019 11:00 pm

Beautiful images, Christian, thank you for sharing...

Franco

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Re: Ca K and G band images take on July 1 and 8, 2018

Post by FMEnage » Sat Jan 05, 2019 2:10 am

Fine details and processing ! Christian
-Mike

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Re: Ca K and G band images take on July 1 and 8, 2018

Post by MapleRidge » Sat Jan 05, 2019 3:47 am

Very sharp Christian...well done :bow

Brian
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christian viladrich
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Re: Ca K and G band images take on July 1 and 8, 2018

Post by christian viladrich » Sat Jan 05, 2019 10:23 am

Thanks to all :-)
Christian
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Re: Ca K and G band images take on July 1 and 8, 2018

Post by marktownley » Sat Jan 05, 2019 10:46 am

These are excellent Christian! What focal length are you running at with the 2 closeup CaK shots?
Image
http://brierleyhillsolar.blogspot.co.uk/
Solar images, a collection of all the most up to date live solar data on the web, imaging & processing tutorials - please take a look!

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Re: Ca K and G band images take on July 1 and 8, 2018

Post by christian viladrich » Sat Jan 05, 2019 5:23 pm

Hello Mark,
The focal length is close to 3000 mm.
Christian Viladrich
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Co-author of "Astronomie Solaire"
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Re: Ca K and G band images take on July 1 and 8, 2018

Post by marktownley » Sat Jan 05, 2019 6:40 pm

Thanks Christian. What are your experiences of the ZWO290M as a camera for solar?
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http://brierleyhillsolar.blogspot.co.uk/
Solar images, a collection of all the most up to date live solar data on the web, imaging & processing tutorials - please take a look!


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Re: Ca K and G band images take on July 1 and 8, 2018

Post by christian viladrich » Sun Jan 06, 2019 11:10 am

Thanks Pedro :-)

Mark, regarding the ASI290, the S/N max is 6.9 bits while it is 7.5 bits for the IMX174. So, in situations where there is a lot of light (e.g. use of an Hershel wedge), the IMX 174 will give better results.
In Ca K, light could me missing. I had some good results with the ASI290 on Venus in UV and on the Sun in Ca K. Still, I have not done extensive tests comparing ASI290 and the IMX 174.
On another hand, the small pixel size of the ASI 290 is a problem in Ha when using mica-spaced etalon since we need to reach F/30.
Christian Viladrich
Co-author of "Astronomie Planétaire"
http://www.astroplanetes.com/
Co-author of "Astronomie Solaire"
http://www.astronomiesolaire.com/

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Re: Ca K and G band images take on July 1 and 8, 2018

Post by eroel » Sun Jan 06, 2019 4:26 pm

Christian:
Super CaK and G band shots.
Best regards,
Eric.

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Re: Ca K and G band images take on July 1 and 8, 2018

Post by Montana » Mon Jan 07, 2019 10:04 am

Absolutely wonderful shots :bow :bow :hamster: I have been doing some Christmas processing to clear the hard drives as well :)

What CaK filter do you use as I have not heard of this brand before?

Alexandra

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