Search found 1644 matches

by p_zetner
Sun Dec 11, 2022 10:29 pm
Forum: This is SolarChat !!
Topic: Circum-solar corona
Replies: 46
Views: 1655

Re: Circum-solar corona

These are fantastic results, George.
Thanks for posting.
Cheers.
Peter
by p_zetner
Wed Dec 07, 2022 1:34 am
Forum: Solar Radio, Magnetometry and Spectroscopy
Topic: SHG Ha USA turkey day sun
Replies: 5
Views: 1175

Re: SHG Ha USA turkey day sun

Excellent results, John.
Your best yet?
Cheers.
Peter
by p_zetner
Mon Nov 28, 2022 5:03 pm
Forum: This is SolarChat !!
Topic: From Valery. Kherson liberation.
Replies: 24
Views: 853

Re: From Valery. Kherson liberation.

Thank you for posting this, Valery.
I’m very happy to hear you have fled Kherson and that you are safe. You and your family have been through hell.
I hope you can soon find permanent safety and start to rebuild your life.
All the best.
Peter
by p_zetner
Fri Sep 30, 2022 1:58 pm
Forum: SPoD Archive
Topic: Corona from 24 September 2022
Replies: 37
Views: 2454

Re: Corona from 24 September 2022

Wow! This is extremely impressive!
I haven’t seen such clear imaging of the coronal loops before.
Congratulations.
Peter
by p_zetner
Fri Sep 30, 2022 1:58 pm
Forum: This is SolarChat !!
Topic: Corona from 24 September 2022
Replies: 45
Views: 1689

Re: Corona from 24 September 2022

Wow! This is extremely impressive!
I haven’t seen such clear imaging of the coronal loops before.
Congratulations.
Peter
by p_zetner
Mon Aug 08, 2022 5:06 pm
Forum: This is SolarChat !!
Topic: Sunny Sunday (morning) 7th August 2022
Replies: 18
Views: 507

Re: Sunny Sunday (morning) 7th August 2022

Really nice images, Stu.
I really enjoy the high resolution Halpha limb shots.
Cheers.
Peter
by p_zetner
Mon Aug 08, 2022 5:04 pm
Forum: This is SolarChat !!
Topic: Fantastic solar afternoon with NicSpencerYork
Replies: 27
Views: 1068

Re: Fantastic solar afternoon with NicSpencerYork

Great pix.
Thanks for sharing.
Cheers.
Peter
by p_zetner
Mon Aug 08, 2022 5:01 pm
Forum: Solar Radio, Magnetometry and Spectroscopy
Topic: Comparing Ca-H and Ca-K SHG images
Replies: 9
Views: 1604

Re: Comparing Ca-H and Ca-K SHG images

Hi Douglas.
Are you still using an asi183 camera for these results?
Thanks.
Peter
by p_zetner
Mon Jul 25, 2022 8:55 pm
Forum: Solar Radio, Magnetometry and Spectroscopy
Topic: Spectacular Filament Lift-Off: A Spectroscopic Study
Replies: 9
Views: 1530

Re: Spectacular Filament Lift-Off: A Spectroscopic Study

Hi Everyone. Here are some more results from my spectroheliograph observation of the erupting filament. These results are from data taken approximately 25 minutes later than the results above. The first image is a spectral series taken through the CaH absorption line. Numbers in the upper left hand ...
by p_zetner
Sat Jul 23, 2022 9:41 pm
Forum: Solar Radio, Magnetometry and Spectroscopy
Topic: G1 Geomagnetic Storm 19th July 2022
Replies: 7
Views: 777

Re: G1 Geomagnetic Storm 19th July 2022

Hi Stu.
Glad to see your magnetometer is still cranking out reliable results!
Cheers.
Peter
by p_zetner
Sat Jul 23, 2022 9:40 pm
Forum: Solar Radio, Magnetometry and Spectroscopy
Topic: SHG Ha and HeD3 prom
Replies: 3
Views: 657

Re: SHG Ha and HeD3 prom

Hi John.
Interesting results.
Your open slit images seem to do a somewhat better job of capturing HeD3 proms.
Cheers.
Peter
by p_zetner
Thu Jul 21, 2022 8:51 pm
Forum: Solar Radio, Magnetometry and Spectroscopy
Topic: Spectacular Filament Lift-Off: A Spectroscopic Study
Replies: 9
Views: 1530

Re: Spectacular Filament Lift-Off: A Spectroscopic Study

Thanks for your interest, Robert.
Do you have a spectroheliograph?
Cheers.
Peter
by p_zetner
Wed Jul 20, 2022 11:47 am
Forum: This is SolarChat !!
Topic: Sun FD in H-Alpha, CaK and Continuum 19th of July 2022
Replies: 7
Views: 317

Re: Sun FD in H-Alpha, CaK and Continuum 19th of July 2022

Very nice disks, Arne.
Cheers.
Peter
by p_zetner
Wed Jul 20, 2022 11:45 am
Forum: This is SolarChat !!
Topic: Images/animations from 7/19/2022
Replies: 16
Views: 486

Re: Images/animations from 7/19/2022

Beautiful images, Warren.
As always, your animations are terrific.
Cheers.
Peter
by p_zetner
Wed Jul 20, 2022 1:16 am
Forum: Solar Radio, Magnetometry and Spectroscopy
Topic: Full-disk SHG images at 656.3nm, 396.8nm and 854.2nm
Replies: 13
Views: 989

Re: Full-disk SHG images at 656.3nm, 396.8nm and 854.2nm

The hydrogen alpha is superb as always and the CaH is your best result yet. In my opinion, the infrared Ca lacks contrast in that the chromospheric network is poorly visible. I don’t think this is due to any inherent difference in UV vs IR calcium chromospheres but points to a lack of contrast and s...
by p_zetner
Tue Jul 19, 2022 7:47 pm
Forum: Sunlit Earth
Topic: panstar k2 comet
Replies: 5
Views: 1112

Re: panstar k2 comet

Nice capture, John.
Cheers.
Peter
by p_zetner
Tue Jul 19, 2022 7:46 pm
Forum: Sunlit Earth
Topic: Clouds clouds and clouds and Opera singer
Replies: 2
Views: 955

Re: Clouds clouds and clouds and Opera singer

Fun! He does carry a nice tune!
I notice he’s a bit puzzled by your little dipole antenna.
Cheers.
Peter
by p_zetner
Tue Jul 19, 2022 2:04 pm
Forum: This is SolarChat !!
Topic: July 16 2022 Imaging. Large SW Prom!
Replies: 28
Views: 958

Re: July 16 2022 Imaging. Large SW Prom!

Well done, James.
Congrats on the SPOD!
Cheers.
Peter
by p_zetner
Tue Jul 19, 2022 2:02 pm
Forum: This is SolarChat !!
Topic: 14 Days of watching AR13053
Replies: 13
Views: 547

Re: 14 Days of watching AR13053

Impressive run!
Cheers.
Peter
by p_zetner
Tue Jul 19, 2022 2:00 pm
Forum: This is SolarChat !!
Topic: Today's SUN (20220718) | Good seeing
Replies: 11
Views: 640

Re: Today's SUN (20220718) | Good seeing

Beautiful set, as always, Pedro!
Cheers.
Peter
by p_zetner
Tue Jul 19, 2022 1:57 pm
Forum: SPoD Archive
Topic: Sol in H⍺ - 14th July 2022
Replies: 10
Views: 1273

Re: Sol in H⍺ - 14th July 2022

Very nice series.
Cheers.
Peter
by p_zetner
Tue Jul 19, 2022 1:57 pm
Forum: This is SolarChat !!
Topic: Sol in H⍺ - 14th July 2022
Replies: 9
Views: 376

Re: Sol in H⍺ - 14th July 2022

Very nice series.
Cheers.
Peter
by p_zetner
Tue Jul 19, 2022 1:55 pm
Forum: SPoD Archive
Topic: 13 July: An assortment of H alpha images.
Replies: 18
Views: 1041

Re: 13 July: An assortment of H alpha images.

Thanks everyone!
I lucked out with the seeing in this session.
Cheers.
Peter
by p_zetner
Tue Jul 19, 2022 1:55 pm
Forum: This is SolarChat !!
Topic: 13 July: An assortment of H alpha images.
Replies: 18
Views: 550

Re: 13 July: An assortment of H alpha images.

Thanks everyone!
I lucked out with the seeing in this session.
Cheers.
Peter
by p_zetner
Tue Jul 19, 2022 1:52 pm
Forum: This is SolarChat !!
Topic: Big prom and AR 18-07
Replies: 18
Views: 476

Re: Big prom and AR 18-07

Beautiful limb shots, Maurits.
Cheers.
Peter
by p_zetner
Tue Jul 19, 2022 1:50 pm
Forum: This is SolarChat !!
Topic: 18.7.2022, more fun with AR 3057 @393nm
Replies: 26
Views: 1159

Re: 18.7.2022, more fun with AR 3057 @393nm

These are fantastic!
Well done.
Peter
by p_zetner
Mon Jul 18, 2022 8:43 pm
Forum: Solar Radio, Magnetometry and Spectroscopy
Topic: Spectacular Filament Lift-Off: A Spectroscopic Study
Replies: 9
Views: 1530

Spectacular Filament Lift-Off: A Spectroscopic Study

Greetings Everyone. On July 15, from about UT 12:00 to 14:00, there was a spectacular filament disappearance event ("disparition brusque") . The event was, of course, covered by the US NSO Integrated Synoptic Program (NISP) GONG network of telescopes and I've generated a time lapse animati...
by p_zetner
Mon Jul 18, 2022 1:17 pm
Forum: Solar Radio, Magnetometry and Spectroscopy
Topic: Helium imaging -- surface features and prominences (July 16)
Replies: 8
Views: 1442

Re: Helium imaging -- surface features and prominences (July 16)

Yes, I'll definitely chime in! To begin with, I'll post an image from July 2015. HeD3_ChroTel_montage_smth.jpg The left part of the image is a spectroheliogram I took in HeD3 (587 nm) light. The right side of the image is from the Chromospheric Telescope (ChroTel) on Tenerife, operated by the Kiepen...
by p_zetner
Sun Jul 17, 2022 5:58 pm
Forum: This is SolarChat !!
Topic: h-alpha, July 13th, 2022
Replies: 6
Views: 281

Re: h-alpha, July 13th, 2022

Beautiful results, Frank.
We appear to have been looking at the same regions of the Sun at roughly the same time!
Cheers.
Peter
by p_zetner
Sun Jul 17, 2022 5:57 pm
Forum: This is SolarChat !!
Topic: 13 July: An assortment of H alpha images.
Replies: 18
Views: 550

Re: 13 July: An assortment of H alpha images.

Dear Maurits, Stu, Valery, Dennis, Franco, Pedro, Arne, Mark, Frank and Warren; Thanks very much for your kind comments! Frank: I'm always wrestling with my tendency to oversharpen but I think I've finally got the hang of applying the right amount. Seeing as I have a single stack, 0.6 angstrom bandp...
by p_zetner
Sun Jul 17, 2022 5:57 pm
Forum: SPoD Archive
Topic: 13 July: An assortment of H alpha images.
Replies: 18
Views: 1041

Re: 13 July: An assortment of H alpha images.

Dear Maurits, Stu, Valery, Dennis, Franco, Pedro, Arne, Mark, Frank and Warren; Thanks very much for your kind comments! Frank: I'm always wrestling with my tendency to oversharpen but I think I've finally got the hang of applying the right amount. Seeing as I have a single stack, 0.6 angstrom bandp...
by p_zetner
Fri Jul 15, 2022 8:59 pm
Forum: Solar Radio, Magnetometry and Spectroscopy
Topic: Spectroheliograph imaging experiments at 656.3 and 854.2 nm
Replies: 9
Views: 916

Re: Spectroheliograph imaging experiments at 656.3 and 854.2 nm

Qualitatively, the image is intermediate between those from the H-alpha and the Ca-H/K lines and shows features in common with them. It is not particularly difficult to image the 854.2 nm line, but the final result is not as exciting as the more "popular" lines. I will give it another att...
by p_zetner
Fri Jul 15, 2022 8:49 pm
Forum: This is SolarChat !!
Topic: 13 July: An assortment of H alpha images.
Replies: 18
Views: 550

13 July: An assortment of H alpha images.

Hi Everyone. Here is a selection of some of the regions visible on the very active Sun's surface as of July 13. I've attached a NSO image marked with the active regions I managed to image. NSO Disk labelled.jpg Images were taken with a system comprising: Aries ERF, Celestron C8 Edge, Moonlite CHL fo...
by p_zetner
Fri Jul 15, 2022 8:49 pm
Forum: SPoD Archive
Topic: 13 July: An assortment of H alpha images.
Replies: 18
Views: 1041

13 July: An assortment of H alpha images.

Hi Everyone. Here is a selection of some of the regions visible on the very active Sun's surface as of July 13. I've attached a NSO image marked with the active regions I managed to image. NSO Disk labelled.jpg Images were taken with a system comprising: Aries ERF, Celestron C8 Edge, Moonlite CHL fo...
by p_zetner
Tue Jul 12, 2022 10:46 pm
Forum: This is SolarChat !!
Topic: Burning Sun 11.07
Replies: 11
Views: 434

Re: Burning Sun 11.07

Beautiful contrast in these images, Maurits.
The DS arrangement works well.
Cheers.
Peter
by p_zetner
Tue Jul 12, 2022 10:43 pm
Forum: This is SolarChat !!
Topic: Saturday afternoon solar (9th July)
Replies: 14
Views: 505

Re: Saturday afternoon solar (9th July)

Beautiful collection, Alexandra.
Cheers.
Peter
by p_zetner
Tue Jul 12, 2022 10:42 pm
Forum: This is SolarChat !!
Topic: Sun FD in H-Alpha, CaK and Continuum 12th of July 2022
Replies: 8
Views: 286

Re: Sun FD in H-Alpha, CaK and Continuum 12th of July 2022

Beautiful disks, Arne, particularly the H alpha.
Cheers.
Peter
by p_zetner
Tue Jul 12, 2022 10:41 pm
Forum: This is SolarChat !!
Topic: h-alpha, July 11th, 2022
Replies: 20
Views: 624

Re: h-alpha, July 11th, 2022

Superb shots, Frank!
Cheers.
Peter
by p_zetner
Tue Jul 12, 2022 10:39 pm
Forum: This is SolarChat !!
Topic: Big protuberance in CaK from the 10th of July 2022.
Replies: 32
Views: 1573

Re: Big protuberance in CaK from the 10th of July 2022.

Great disk and a spectacular prominence!
Nice work, Eric.
Cheers.
Peter
by p_zetner
Tue Jul 12, 2022 10:38 pm
Forum: This is SolarChat !!
Topic: Huge Filament! AR3053~3055 | HA, CaK, Cont | July 11th 2022
Replies: 11
Views: 442

Re: Huge Filament! AR3053~3055 | HA, CaK, Cont | July 11th 2022

Terrific images, Marty.
That filament is amazing and stating it’s length in light-seconds really drives home the size.
Cheers.
Peter
by p_zetner
Tue Jul 12, 2022 10:23 pm
Forum: Solar Radio, Magnetometry and Spectroscopy
Topic: Measurement of magnetic field of AR 3053 and 3055 through Zeeman effect
Replies: 5
Views: 605

Re: Measurement of magnetic field of AR 3053 and 3055 through Zeeman effect

Beautiful work, Fulvio (in spite of your “rocky” start)! The splitting of the Fe 6173 line is so sharp. You can clearly see the pi and both sigma components. In fact, the pi components in the two sunspots have different intensities relative to the sigma components which, I believe, gives you some in...
by p_zetner
Sat Jul 09, 2022 3:24 am
Forum: This is SolarChat !!
Topic: h-alpha, July 8th, 2022
Replies: 9
Views: 335

Re: h-alpha, July 8th, 2022

Great shot of this AR, Frank.
Cheers.
Peter
by p_zetner
Sat Jul 09, 2022 3:23 am
Forum: This is SolarChat !!
Topic: Animation of SE Limb from 7/3/2022
Replies: 16
Views: 494

Re: Animation of SE Limb from 7/3/2022

More fabulous animations, Warren.
Thanks for posting these.
Cheers.
Peter
by p_zetner
Sat Jul 09, 2022 3:21 am
Forum: This is SolarChat !!
Topic: Sol 7-7-22
Replies: 6
Views: 268

Re: Sol 7-7-22

Very nice collection, Steve.
Cheers.
Peter
by p_zetner
Sat Jul 09, 2022 3:20 am
Forum: This is SolarChat !!
Topic: Sun FD in H-Alpha, CaK and Continuum 8th of July 2022
Replies: 11
Views: 479

Re: Sun FD in H-Alpha, CaK and Continuum 8th of July 2022

Beautiful disks, Arne.
These are amazing in full size!
Cheers.
Peter
by p_zetner
Fri Jul 08, 2022 11:56 pm
Forum: Solar Radio, Magnetometry and Spectroscopy
Topic: Full-disk H-alpha, beta SHG -- stacking, high resolution
Replies: 10
Views: 829

Re: Full-disk H-alpha, beta SHG -- stacking, high resolution

I agree with Christian. Your H alpha image is comparable to the better full disks produced by conventional double stacked telescopes (today’s SPOD for example). I also echo Alexandra’s comment….looking forward to seeing your HeD3 results.