SolarChat!

p_zetner

Very nice results, Stu.
Cheers.
Peter

p_zetner

Nice result. Have you had any success with other wavelengths? I assume these are H-alpha.
Cheers.
Peter

To the mods: a little odd that this isn’t in the Spectroscopy forum ?

p_zetner

Quote Daniele: Are blue and red wings of hydrogen alpha basically equivalent? Quote Christian: The answer is yes :-) I'll have to offer a somewhat dissenting opinion here. Depending on your use of the word "basically" I suppose Christian's answer is valid. For the purpose of tuning a quark...

p_zetner

Dennis, Maurits, Frank and Ivan: Many thanks for your positive feedback. Thanks, Franco. It’s good to be back! Alexandra: Your supportive comments always make my day! Eric: I hope you get to use your big ERF as well. You’re clearly a master of full disk imaging. It’s challenging to image at this clo...

p_zetner

Hi Everyone. After a long winter, vast amounts of snowfall and, finally, a few days of torrential downpour with associated flooding across the province, I've finally been able to set up for an imaging session! The window of opportunity was short and the seeing average but I managed some H-alpha, hig...

p_zetner

Hi Everyone. After a long winter, vast amounts of snowfall and, finally, a few days of torrential downpour with associated flooding across the province, I've finally been able to set up for an imaging session! The window of opportunity was short and the seeing average but I managed some H-alpha, hig...

p_zetner

Have a nice day!

p_zetner

Sorry to have to disagree with you, Alexandra.
I was preparing my response as you posted yours.
Just because there is a fortuitous alignment of laboratory Kr lines with the telluric oxygen band doesn't mean that solar Kr features are hiding there.
See the reasons for my statement in my post.
Peter

p_zetner

Thanks for the resources, Christian. I'll add this one which has been my go-to workhorse for solar spectrum analysis. It's easily retrievable from the BASS2000 site and is compiled from 1971 data of Charlotte Moore (NBS) so is a little outdated compared to the Wallace et.al. document you've linked. ...

p_zetner

Hi Alexandra. I’m not aware of any krypton lines in the visible / near infrared part of the solar spectrum. There is a strong potassium line at 7699 angstroms and another at 7665 angstroms. Maybe your anonymous SolarChatter has confused the chemical symbol of potassium (K) with the chemical symbol o...

p_zetner

Beautiful!
Cheers.
Peter

p_zetner

Beautiful results, Stu.
That double-stacked limb in the first shot is gorgeous.
Cheers.
Peter

p_zetner

Spectacular work, Valery.
Thank you for posting these.
Cheers.
Peter

p_zetner

Great capture!
Cheers.
Peter

p_zetner

What a great set of stills and spectacular animation!
Well done, Alexandra.
Cheers.
Peter

p_zetner

Wow! Utterly spectacular.
Right time + “know how” = amazing result.
Cheers.
Peter

p_zetner

Hi Fulvio. Concerning your questions The molecular population of CN belongs only to sun cromosphere? - If so,at what height and temperature? Molecules are formed mainly in the outer layers of the photosphere (low chromosphere). Their formation is generally highly temperature sensitive so they “live”...

p_zetner

Lovely calcium disks, Franco.
Best wishes for a speedy recovery.
Cheers.
Peter

p_zetner

Beautiful results, Marty.
I’m sick of winter!
Cheers.
Peter

p_zetner

Very nice work and the instrument is a beauty!
Cheers.
Peter

p_zetner

No apologies necessary, Fulvio.
There is a lot of history on this forum which is why it is so useful.
Cheers.
Peter

p_zetner

Stunning set of images!
Congratulations on well-deserved SPOD.
Cheers.
Peter

p_zetner

Thanks for the post, Valery.
Good to see you are having some moments of peace and calm?
Cheers.
Peter

p_zetner

The subject of CN imaging has also been discussed in these two forum threads: 2022: https://solarchatforum.com/viewtopic.php?f=8&t=34502 2013: https://solarchatforum.com/viewtopic.php?f=8&t=9608 I believe the 2013 thread may have been my first reported CN image. The actual images are absent ...

p_zetner · Re: April 23, 2022 WL+ Very nice shots, Phil. Cheers. Peter

Very nice shots, Phil.
Cheers.
Peter

p_zetner

Very nice. For the first time in the amateur field (I think) a spectroheliogram of the solar disk in light of the molecular lines of Cyanogen (Cn) at 3882 and 3883Å. This is a bit of a bold claim and not quite accurate! My latest CN image (2021) is posted in this thread: https://solarchatforum.com/v...

p_zetner

Super results, Stu. Some spectacular action in view.
Nothing but rain and snow and more rain and more snow here.
I think I was out and imaging by this time last year.
Cheers.
Peter

p_zetner

Welcome to the forum, Fulvio.
It will be good to follow your work.
Cheers.
Peter

p_zetner

Terrific series, Marty.
Cheers.
Peter

p_zetner

Dear Valery; I’m so sad this attempt has failed and so sorry for the fear and disappointment you and your family are enduring. You seem to be very close to the front lines so maybe things can change rapidly. I can only hope that some window of opportunity opens soon for you. Thank you for taking tim...

p_zetner

You are stuck in a nightmare!
I hope luck is on your side for the attempt on Saturday.
All my best wishes, Valery.
Peter

p_zetner

Magnificent views, Stu!
Cheers.
Peter

p_zetner

Good luck to you, Valery!!
Please let us know how it goes.
Wishing you a safe journey.
Peter

p_zetner

Hi Rainer.

Your loop is ~ lambda / 8.38. It’s only the circumference of a single loop that matters. This would be considered a “small loop” with a null in the antenna pattern along the coil axis and maximum in the antenna pattern in the plane of the loop.

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p_zetner

Hi Rainer. Thanks for your comments. "Any information somewhere about how to calculate a Loop antenna for a specific frequency?" "Why are loop antennas not common in this cases. They are small and so require just a tiny space." Loop antennas are specified by the number of wavelen...

p_zetner

Greetings All. There's been some interest expressed in solar radio astronomy so I thought I'd throw in my two cents' worth. Many of you probably realize that there is an entire chapter (Chapter 13) dedicated to solar radio astronomy in Christian's book "Solar Astronomy: Observing, imaging and s...

p_zetner

Greetings All. There's been some interest expressed in solar radio astronomy so I thought I'd throw in my two cents' worth. Many of you probably realize that there is an entire chapter (Chapter 13) dedicated to solar radio astronomy in Christian's book "Solar Astronomy: Observing, imaging and s...

p_zetner

Nice work, John.
Cheers.
Peter

p_zetner

Wishing you a quick return to good health, Terry.
All the best.
Peter

p_zetner

Yes, Peter, I am still in Kherson. It is not easy - to find a releable relatively safe way to leave the city and get to a more safe place. If nothing prevents, we should leave in a 1-2 days. Thanks for the information, Valery. I feel grief that you are faced with this terrible choice. It is a horri...

p_zetner

You are daily in my thoughts, Valery.
Are you still in Kherson?
Peter

p_zetner

You could try Bernhard Halle: https://www.b-halle.de/products/mirrors ... lates.html

This solution will be expensive, though!

Cheers.
Peter

p_zetner

Terrific animations!
Exciting to see these flare events.
Cheers.
Peter

p_zetner

Always thinking of you in your time of unbelievable hardship.
Stay strong, Valery.
Peter

p_zetner

Hah!
Glad that cup of coffee helped you work the bugs out, Phil!
Great results.
Cheers.
Peter

p_zetner

Hah!
Glad that cup of coffee helped you work the bugs out, Phil!
Great results.
Cheers.
Peter

p_zetner

Beautiful disks, Mark.
Cheers.
Peter

p_zetner

Beautiful results, Marty.
Cheers.
Peter

p_zetner

Thanks Mark and John.

Here is the last of the batch: the helium D3 chromospheric line.

Cheers.
Peter

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p_zetner

Outstanding!
Cheers.
Peter

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