Search found 1594 matches

by p_zetner
Mon Jul 04, 2022 2:17 am
Forum: Solar Radio, Magnetometry and Spectroscopy
Topic: my first hbeta with open slit
Replies: 2
Views: 57

Re: my first hbeta with open slit

The H beta looks good and it’s great to see the HeD3.
by p_zetner
Sun Jul 03, 2022 6:24 pm
Forum: Solar Radio, Magnetometry and Spectroscopy
Topic: 23June2022: AR13038 - Spectral sweep through H alpha.
Replies: 6
Views: 88

Re: 23June2022: AR13038 - Spectral sweep through H alpha.

Thanks for your comments, Mark and Alexandra. There's actually some interesting information hidden in the animations. If you look at features in the red and blue wings of the H alpha line (symmetrically spaced around line centre) they are actually quite different. This is because of their motions an...
by p_zetner
Sun Jul 03, 2022 1:25 am
Forum: Solar Radio, Magnetometry and Spectroscopy
Topic: 23June2022: AR13038 - Spectral sweep through H alpha.
Replies: 6
Views: 88

Re: 23June2022: AR13038 - Spectral sweep through H alpha.

Here is a cropped version showing only the active region.
23Jun2022_Halpha_133817_SpecSweep_siz_lvls_crop.gif
23Jun2022_Halpha_133817_SpecSweep_siz_lvls_crop.gif (2.59 MiB) Viewed 87 times
by p_zetner
Sun Jul 03, 2022 1:20 am
Forum: Solar Radio, Magnetometry and Spectroscopy
Topic: 23June2022: AR13038 - Spectral sweep through H alpha.
Replies: 6
Views: 88

23June2022: AR13038 - Spectral sweep through H alpha.

Hi Everyone. Part of my June 23 spectroheliography session was devoted to experimenting with a barlow on the telescope (C4 NexStar with Celestron barlow) for a more magnified image scale. At first, I didn't think much of the results because of severe vignetting with the barlow. On closer inspection,...
by p_zetner
Sun Jul 03, 2022 12:40 am
Forum: Solar Radio, Magnetometry and Spectroscopy
Topic: 23June2022: H alpha prominence spectral analysis
Replies: 4
Views: 92

Re: 23June2022: H alpha prominence spectral analysis

Thanks for the feedback Alexandra, Mark and Stu.
Alexandra, I will work on a better graphic to help explain the observations and post it as soon as I get the chance.
Cheers.
Peter
by p_zetner
Sun Jul 03, 2022 12:38 am
Forum: Solar Radio, Magnetometry and Spectroscopy
Topic: some open slit photo - videos
Replies: 8
Views: 172

Re: some open slit photo - videos

Nice results, John.
by p_zetner
Thu Jun 30, 2022 5:20 pm
Forum: Solar Radio, Magnetometry and Spectroscopy
Topic: SHG filament dance
Replies: 4
Views: 104

Re: SHG filament dance

Hi John.
I’m assuming this is an animation of two spectroheliograms?
Are they generated from the same video or two different videos?
Peter
by p_zetner
Thu Jun 30, 2022 12:05 am
Forum: Solar Radio, Magnetometry and Spectroscopy
Topic: 23May2022: UV Spectroheliograms
Replies: 3
Views: 93

23May2022: UV Spectroheliograms

Hi Everyone. I posted a few images previously from my 23 May spectroheliography session: https://solarchatforum.com/viewtopic.php?t=36323 Here are a few more spectroheliograms as well as some spectra. UV_montage_siz.jpg UV_Spectrum_montage_siz.jpg The measured spectra agree well with the BASS2000 sp...
by p_zetner
Wed Jun 29, 2022 11:52 pm
Forum: Solar Radio, Magnetometry and Spectroscopy
Topic: 23June2022: The Fraunhofer Four
Replies: 6
Views: 136

Re: 23June2022: The Fraunhofer Four

Thanks, Fulvio.
All the best.
Peter
by p_zetner
Wed Jun 29, 2022 6:40 pm
Forum: Solar Radio, Magnetometry and Spectroscopy
Topic: 23June2022: H alpha prominence spectral analysis
Replies: 4
Views: 92

23June2022: H alpha prominence spectral analysis

Hi Everyone. Warren's spectacular animation of the huge NW filaprom on the 23rd showed a lot of complex motion. https://solarchatforum.com/viewtopic.php?t=36774 Since I was imaging with my SHG on the same day, I thought I would take a look at the prominence spectrum to see if there was any sign of i...
by p_zetner
Wed Jun 29, 2022 6:14 pm
Forum: Solar Radio, Magnetometry and Spectroscopy
Topic: 23June2022: The Fraunhofer Four
Replies: 6
Views: 136

Re: 23June2022: The Fraunhofer Four

Thanks for your kind comments Alan, Alexandra and mark.
Cheers.
Peter
by p_zetner
Tue Jun 28, 2022 3:26 pm
Forum: Solar Radio, Magnetometry and Spectroscopy
Topic: Periodic Table of emission spectra
Replies: 6
Views: 108

Re: Periodic Table of emission spectra

Hi Alexandra. You might be referring to the BASS2000 website? Here’s the link: https://bass2000.obspm.fr/solar_spect.php The BASS2000 spectrum isn’t labelled but there is an associated downloadable pdf with all the lines identified. There’s also the Liege solar spectrum atlas to play with: https://f...
by p_zetner
Tue Jun 28, 2022 4:51 am
Forum: This is SolarChat !!
Topic: Animation of the huge NW filaprom 6/23/2022
Replies: 26
Views: 319

Re: Animation of the huge NW filaprom 6/23/2022

Terrific animation!
The southernmost part sure does look like a monstrous twister.
Cheers.
Peter
by p_zetner
Tue Jun 28, 2022 4:02 am
Forum: Solar Radio, Magnetometry and Spectroscopy
Topic: Periodic Table of emission spectra
Replies: 6
Views: 108

Re: Periodic Table of emission spectra

Hi. The most exhaustive data base I know is that of the American National Institute of Standards and Technology (NIST). A good starting point for you would be the “Basic Atomic Spectroscopic Data” page at https://physics.nist.gov/PhysRefData/Handbook/element_name.htm Click on the element you’re inte...
by p_zetner
Mon Jun 27, 2022 8:04 pm
Forum: Solar Radio, Magnetometry and Spectroscopy
Topic: 23June2022: The Fraunhofer Four
Replies: 6
Views: 136

23June2022: The Fraunhofer Four

Hello Everyone. Here is a collection of images from my spectroheliography session of 23 June. The montage shows three chromospheres (hydrogen, calcium and helium) in four lights: Ca H (396.85 nm), H beta (486.13 nm), He D3 (587.56 nm) and H alpha (656.28 nm). These are the Fraunhofer H, F, D3 and C ...
by p_zetner
Thu Jun 23, 2022 2:14 am
Forum: Solar Radio, Magnetometry and Spectroscopy
Topic: H-beta, H-alpha, CaH high-resolution SHG images, June 22
Replies: 6
Views: 125

Re: H-beta and H-alpha SHG high resolution images, June 22

These are excellent!
I’m a little surprised that you claim a spectral resolution of 0.16 angstroms. How did you measure this?
by p_zetner
Sat Jun 18, 2022 2:01 am
Forum: Solar Radio, Magnetometry and Spectroscopy
Topic: H-beta and H-alpha, full-disk SHG at 700mm FL (and a big ejection)
Replies: 6
Views: 156

Re: H-beta and H-alpha, full-disk SHG at 700mm FL (and a big ejection)

Your raw data is remarkably clean! There is always a characteristic “spiky” appearance to features I capture in my spectroheliograms. I assume this is due to seeing variations over the course of my (slow) scan. What surprises me is that these spiky variations don’t seem to appear in your raw (fast) ...
by p_zetner
Fri Jun 17, 2022 2:51 am
Forum: Solar Radio, Magnetometry and Spectroscopy
Topic: 22May2022 Spectroheliograms - Part 2 - Fraunhofer Four
Replies: 3
Views: 119

Re: 22May2022 Spectroheliograms - Part 2 - Fraunhofer Four

Thanks Chris and Alexandra.

I thought I would post another Ca H image processed to preserve the prominences.
There's a filaprom visible on the E side of the Northern pole which was lost in my previous processing of the disk.

Cheers.
Peter
CaH_Montage_disk_proms.jpg
CaH_Montage_disk_proms.jpg (1.43 MiB) Viewed 56 times
by p_zetner
Fri Jun 17, 2022 2:43 am
Forum: Solar Radio, Magnetometry and Spectroscopy
Topic: beautiffull prom this morning June 16th
Replies: 8
Views: 130

Re: beautiffull prom this morning June 16th

These are very nice results. I have to admit I'm surprised at the better definiton you achieve with the 600 l/mm grating. You're also able to capture quite a wide field of view with this grating. I would have thought that you are beginning to shift too far away from the absorption line centre at the...
by p_zetner
Fri Jun 17, 2022 2:38 am
Forum: Solar Radio, Magnetometry and Spectroscopy
Topic: H-alpha and CaK full-disk SHG images -- plus CaK proms
Replies: 9
Views: 238

Re: H-alpha and CaK full-disk SHG images -- plus CaK proms

These are very good!
I certainly agree that, apart from H alpha, "filaments only appear clearly with quite narrowband imaging".
Your results are making wonder if I should give the "fast scan" technique a try!
Cheers.
Peter
by p_zetner
Thu Jun 16, 2022 2:26 am
Forum: Solar Radio, Magnetometry and Spectroscopy
Topic: 22May2022 Spectroheliograms - Part 2 - Fraunhofer Four
Replies: 3
Views: 119

22May2022 Spectroheliograms - Part 2 - Fraunhofer Four

Hello Everyone. I've been very slow to process data but have finally prepared the next installment of images from my 22May spectroheliography session. The montage below shows four different views of the solar chromosphere in the lights of Ca H (396.85 nm), H beta (486.13 nm), He D3 (587.56 nm) and H...
by p_zetner
Wed Jun 15, 2022 11:33 am
Forum: Solar Radio, Magnetometry and Spectroscopy
Topic: Improved full-disk SHG H-alpha imaging at 700mm FL
Replies: 7
Views: 149

Re: Improved full-disk SHG H-alpha imaging at 700mm FL

That’s a very nice result.
Well done.
Peter
by p_zetner
Sat Jun 11, 2022 4:46 pm
Forum: Solar Radio, Magnetometry and Spectroscopy
Topic: 22May2022 Spectroheliograms - Part 1 - Halpha
Replies: 5
Views: 189

Re: 22May2022 Spectroheliograms - Part 1 - Halpha

Hi Everyone. I've been slow to process images but wanted to amend the original post which shows H alpha disks at (presumed) line centre and in the red wing. When I processed blue wing images, it became evident that my wavelength calibration was off. So, here are H alpha spectroheliograms in both red...
by p_zetner
Sat Jun 11, 2022 4:37 pm
Forum: Solar Radio, Magnetometry and Spectroscopy
Topic: Custom-made fused quartz slits for SHG -- 9 micron x 12 mm
Replies: 6
Views: 199

Re: Custom-made fused quartz slits for SHG -- 9 micron x 12 mm

This looks very promising!
Thanks for pursuing this.
Cheers.
Peter