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New AR12717 August 01 2018 C8 telescope with 214mm DERF

Posted: Wed Aug 01, 2018 1:53 pm
by Valery
Hi all,



An active area AR12717 on the sun, August 1, 2018. This is a dipole - an emergency flux area.

Telescope C8 203mm F/10 SCT equipped with the ARIES 214mm two bands dielectric energy rejection filter (DERF), PST etalon camera Basler 1920-155.

Pictures are in the core of the H-a line and in the red and blue wings of the H-a line. Note that in the red wing of Ha a photospheric granulation is perfectly visible, while in the blue wing it is not visible.

Seeing was average.


Thanks for looking.

Valery

Re: New AR12717 August 01 2018 C8 telescope with 214mm DERF

Posted: Wed Aug 01, 2018 11:21 pm
by marktownley
These are excellent images, i like on the last one how you can see the granulation starting to poke through.

Re: New AR12717 August 01 2018 C8 telescope with 214mm DERF

Posted: Thu Aug 02, 2018 9:12 am
by Montana
These are tremendous Valery, I really enjoyed these :hamster: :bow
Alexandra

Re: New AR12717 August 01 2018 C8 telescope with 214mm DERF

Posted: Thu Aug 02, 2018 3:09 pm
by Valery
Thanks, Alexandra and Mark

I enjoy the difference in loop prominence appearance between blue and red wing as well as different appearance of the photospheric (RW) and lowest chromospheric (BW) "surfaces".

Re: New AR12717 August 01 2018 C8 telescope with 214mm DERF

Posted: Sat Aug 04, 2018 12:22 am
by MapleRidge
Very impressive Valery...especially the granulation lurking in the background of the red wing image :bow

Brian

Re: New AR12717 August 01 2018 C8 telescope with 214mm DERF

Posted: Sat Aug 04, 2018 3:45 pm
by Valery
MapleRidge wrote:
Sat Aug 04, 2018 12:22 am
Very impressive Valery...especially the granulation lurking in the background of the red wing image :bow

Brian
Thanks, Brian

When I imaging in H-a I really hate all these lurking photospheric cells network. :)

Re: New AR12717 August 01 2018 C8 telescope with 214mm DERF

Posted: Sun Aug 05, 2018 7:24 pm
by christian viladrich
Very nice set of images Valery !

Re: New AR12717 August 01 2018 C8 telescope with 214mm DERF

Posted: Sun Aug 05, 2018 8:30 pm
by Carbon60
Excellent images, Valery. Interesting to see in detail the Ha wings.

Stu.

Re: New AR12717 August 01 2018 C8 telescope with 214mm DERF

Posted: Mon Aug 06, 2018 2:39 am
by p_zetner
Beautiful images, Valery.
The off-band views are very interesting. The enhanced (loop?) absorption in the blue wing seems to be consistent with the picture of prominence gas condensing out of the corona and streaming down to the surface. Do you have an idea of the wavelength offsets in your detuned images?
Cheers, Peter.

Re: New AR12717 August 01 2018 C8 telescope with 214mm DERF

Posted: Mon Aug 06, 2018 3:37 am
by Valery
Thanks, Christian, Stu and Peter!


Peter, I don't know how much were the detuning in these cases, but my guess is +0,5 to +0,7A red and -0,6 to -0,7A blue.


Valery