Search found 3972 matches
- Tue Mar 08, 2022 11:57 pm
- Forum: Solar Radio, Magnetometry and Spectroscopy
- Topic: Dipping my Toe into Spectroscopy
- Replies: 24
- Views: 2409
Re: Dipping my Toe into Spectroscopy
Stu, That's a good find! We've been looking for such a supplier for some time. The LG10 (10 micron x 10mm) looks perfect for the majority of spectroheliograph applications/instruments. The pricing is unfortunately very high!!! A cheaper and more flexible slit disk is the reflective multiple slit pla...
- Tue Mar 08, 2022 8:24 am
- Forum: This is SolarChat !!
- Topic: High Resolution H alpha full disk Sol'Ex image
- Replies: 17
- Views: 672
Re: High Resolution H alpha full disk Sol'Ex image
Alexandra, et al,
I'm out of action for the foreseeable future.
We are acting as carers for mother in law (over 90) and her partner (still in hospital) as they have a slow recovery from Covid.
It's 24/7 and 200 Km from the scopes and office.
I'm out of action for the foreseeable future.
We are acting as carers for mother in law (over 90) and her partner (still in hospital) as they have a slow recovery from Covid.
It's 24/7 and 200 Km from the scopes and office.
- Tue Mar 08, 2022 6:09 am
- Forum: This is SolarChat !!
- Topic: High Resolution H alpha full disk Sol'Ex image
- Replies: 17
- Views: 672
High Resolution H alpha full disk Sol'Ex image
Dominique Boutigny's results with his Sol'Ex SHG are among the best I've seen. Stacking of 15 images from Solex_ser_recon (15 SER video's over a 10 min period) with Autostakkert and post-processing with Astrosurface. 66/400 telescope - ND8 filter - ASI 178MM camera and 6 nm Halpha pre-filter at the ...
- Tue Mar 08, 2022 4:29 am
- Forum: Commercial Solar Filters/Cameras/Hardware
- Topic: The Quark is here, more questions
- Replies: 74
- Views: 8046
Re: The Quark is here, more questions
Tareq, Your Q4.... This is totally incorrect! An Urban Myth. I have it in writing from Manufacturers of rear element refractors - Petzval designs etc. (Televue, Williams Optics, Takahashi) that their telescopes are 100% safe to use with Herschel wedges with NO additional ERF protection. If you have ...
- Mon Mar 07, 2022 5:59 am
- Forum: Solar Radio, Magnetometry and Spectroscopy
- Topic: Dipping my Toe into Spectroscopy
- Replies: 24
- Views: 2409
Re: Dipping my Toe into Spectroscopy
Stu, Thanks for that. The spectral coverage looks like 176A/ frame If your slit is roughly 50 micron ( a visually narrow gap) then due to the anamorphic ratio and the magnification ratio Collimator/Imager =x4 the effective slit gap will be about 140micron - which is extremely large!!! This has the e...
- Sun Mar 06, 2022 4:29 am
- Forum: Commercial Solar Filters/Cameras/Hardware
- Topic: Orion advert for Coronado PST?????
- Replies: 3
- Views: 1242
Orion advert for Coronado PST?????
https://www.telescope.com/catalog/search.cmd?form_state=searchForm&siteCode=US&keyword=55712 This compact 40mm f/10 refractor houses a special filter called an etalon, which transmits only the primary wavelength of light emitted by hydrogen (656.3nm) in the solar chromosphere, where all the ...
- Sat Mar 05, 2022 10:25 pm
- Forum: Solar Radio, Magnetometry and Spectroscopy
- Topic: Dipping my Toe into Spectroscopy
- Replies: 24
- Views: 2409
Re: Dipping my Toe into Spectroscopy
Stu,
Interesting arrangement!
You don't mention your slit gap, imaging lens detail or camera.
If you add your data to the SimSpec spreadsheet it will give you a good idea of probable performance.
Interesting arrangement!
You don't mention your slit gap, imaging lens detail or camera.
If you add your data to the SimSpec spreadsheet it will give you a good idea of probable performance.
- Thu Mar 03, 2022 11:45 pm
- Forum: This is SolarChat !!
- Topic: First post after years of learning and reading here
- Replies: 20
- Views: 674
Re: First post after years of learning and reading here
Great result!
You're of to a good start, keep them coming.
You're of to a good start, keep them coming.
- Thu Mar 03, 2022 11:42 pm
- Forum: This is SolarChat !!
- Topic: Thoughts about PST tuning mechanism?
- Replies: 6
- Views: 313
Re: Thoughts about PST tuning mechanism?
The response I referred to was provided by the designer and manufacturer of the PST system (Lunt).
Ken
Ken
- Thu Mar 03, 2022 10:41 pm
- Forum: Solar Radio, Magnetometry and Spectroscopy
- Topic: Dipping my Toe into Spectroscopy
- Replies: 24
- Views: 2409
Re: Dipping my Toe into Spectroscopy
Stu, Welcome to spectroscopy! What design of spectrograph have you gone for? Your spectral image looks a little sharpened/ processed??? I use and recommend BASS Project ( https://groups.io/g/BassSpectro) for all the necessary spectral processing. It will allow you to stitch together your spectral im...
- Mon Feb 28, 2022 4:49 am
- Forum: This is SolarChat !!
- Topic: Kanzelhoehe Solar Observatory CaK.
- Replies: 12
- Views: 587
Re: Kanzelhoehe Solar Observatory CaK.
They use a Lyot Ha filter and a Lunt CaK filter......
https://www.kso.ac.at/instrumente/instrumente_en.php
https://www.kso.ac.at/instrumente/instrumente_en.php
- Sun Feb 27, 2022 7:20 am
- Forum: This is SolarChat !!
- Topic: Online remote telescope services. Has anyone here used one?
- Replies: 88
- Views: 2842
Re: Online remote telescope services. Has anyone here used one?
James,
My extreme narrowband CaK images taken with the MiniSHG are not replicated on the solar sites.
Likewise for the other “non standard “ wavelengths and H alpha.
My extreme narrowband CaK images taken with the MiniSHG are not replicated on the solar sites.
Likewise for the other “non standard “ wavelengths and H alpha.
- Mon Feb 21, 2022 3:09 am
- Forum: This is SolarChat !!
- Topic: Sun in Ca-K - first light
- Replies: 15
- Views: 594
Re: Sun in Ca-K - first light
Rob,
I find the CaK filter works best at f10 or higher.
Nice result for a first light.
I find the CaK filter works best at f10 or higher.
Nice result for a first light.
- Sun Feb 20, 2022 8:05 am
- Forum: This is SolarChat !!
- Topic: First day solar viewing and first post
- Replies: 11
- Views: 403
Re: First day solar viewing and first post
Good on you mate!
You're off to a good start.
Which camera are you using?
You're off to a good start.
Which camera are you using?
- Sun Feb 20, 2022 7:19 am
- Forum: This is SolarChat !!
- Topic: Online remote telescope services. Has anyone here used one?
- Replies: 88
- Views: 2842
Re: Online remote telescope services. Has anyone here used one?
Bob Yoesle published details some time ago.
BUT…..
Like Rainer and my self who have rigged up remote for focuser and tilt systems they’re success would depend on positive remote access and control.
BUT…..
Like Rainer and my self who have rigged up remote for focuser and tilt systems they’re success would depend on positive remote access and control.
- Sat Feb 19, 2022 9:29 am
- Forum: This is SolarChat !!
- Topic: Online remote telescope services. Has anyone here used one?
- Replies: 88
- Views: 2842
Re: Online remote telescope services. Has anyone here used one?
James, I made investigations for Spectroscopy and Solar imaging with iTelescope (based here in Australia) No idea about spectroscopy (“how to you spell that….”) They said they were looking at solar imaging, but no definite plans. I don’t think they understand the issues of making solar Ha scopes aut...
- Fri Feb 18, 2022 5:07 am
- Forum: This is SolarChat !!
- Topic: CaK 17th Feb 2022
- Replies: 18
- Views: 672
Re: CaK 17th Feb 2022
Thanks guys, I really appreciate your support. My wife has gone to live with them and is effectively in isolation for the next seven days. Getting daily supplies delivered in a small rural village is proving challenging. One is still in hospital and the doctors are saying he'll probably stay a week....
- Thu Feb 17, 2022 10:25 pm
- Forum: This is SolarChat !!
- Topic: CaK 17th Feb 2022
- Replies: 18
- Views: 672
Re: CaK 17th Feb 2022
Thanks everybody! Appreciate SPOD!!! I may be out of business for a while....there are senior (>90 year old) members of the family who have been hit by Covid. One is now in hospital for the second time. Not looking good. We will become the nominated carers and this means temporarily (???!) moving 20...
- Thu Feb 17, 2022 10:01 am
- Forum: SPoD Archive
- Topic: CaK 17th Feb 2022
- Replies: 1
- Views: 528
CaK 17th Feb 2022
A selection of close-ups showing the current AR activity. https://www.swpc.noaa.gov/products/solar-synoptic-map There's a new small spot appearing in the south east..... Vixen Custom90,DIY CaK filter and ASI 1600 Full disk MiniSHG, ED80, ASI 178 showing the extent of the filaments and a "protus...
- Thu Feb 17, 2022 10:01 am
- Forum: This is SolarChat !!
- Topic: CaK 17th Feb 2022
- Replies: 18
- Views: 672
CaK 17th Feb 2022
A selection of close-ups showing the current AR activity. https://www.swpc.noaa.gov/products/solar-synoptic-map There's a new small spot appearing in the south east..... Vixen Custom90,DIY CaK filter and ASI 1600 Full disk MiniSHG, ED80, ASI 178 showing the extent of the filaments and a "protus...
- Mon Feb 07, 2022 7:49 am
- Forum: This is SolarChat !!
- Topic: "Sparkling diamonds" CaK on the 6th Feb 2022
- Replies: 10
- Views: 494
Re: "Sparkling diamonds" CaK on the 6th Feb 2022
Thanks guys, appreciate your support.
It shows there are some interesting developments in the Ca II wavelengths.
It shows there are some interesting developments in the Ca II wavelengths.
- Mon Feb 07, 2022 7:19 am
- Forum: This is SolarChat !!
- Topic: Solar CaK and CaH 7th Feb 2022
- Replies: 9
- Views: 414
Re: Solar CaK and CaH 7th Feb 2022
Thanks to everyone, appreciate your support.
An interesting comparison between CaK and CaH.
An interesting comparison between CaK and CaH.
- Sun Feb 06, 2022 10:17 pm
- Forum: This is SolarChat !!
- Topic: Solar CaK and CaH 7th Feb 2022
- Replies: 9
- Views: 414
Solar CaK and CaH 7th Feb 2022
Similar AR's visible from yesterday but some very dramatic proms now visible.
MiniSHG images in Ca II K3 and Ca II H3.
MiniSHG images in Ca II K3 and Ca II H3.
- Sun Feb 06, 2022 10:16 pm
- Forum: This is SolarChat !!
- Topic: Sun February 5, 2022 - CaH
- Replies: 15
- Views: 447
Re: Sun February 5, 2022 - CaH
Franco,
Good catch, well done!
Good catch, well done!
- Sun Feb 06, 2022 3:00 am
- Forum: This is SolarChat !!
- Topic: Sun FD in H-Alpha and CaK 5th of February 2022
- Replies: 8
- Views: 408
Re: Sun FD in H-Alpha and CaK 5th of February 2022
Arne,
Great results, well done!
Great results, well done!
- Sun Feb 06, 2022 2:56 am
- Forum: This is SolarChat !!
- Topic: Sol from the 5th of February 2022.
- Replies: 11
- Views: 463
Re: Sol from the 5th of February 2022.
Eroel,
Fantastic results, well presented!
Well done.
Fantastic results, well presented!
Well done.
- Sat Feb 05, 2022 11:44 pm
- Forum: This is SolarChat !!
- Topic: "Sparkling diamonds" CaK on the 6th Feb 2022
- Replies: 10
- Views: 494
"Sparkling diamonds" CaK on the 6th Feb 2022
The solar disk is still dominated by the central active areas, AR2939 and AR2940. Over in the north west the last remnants of AR 2938/36 are disappearing and the latest AR2941 is coming into view in the north east. There's a small un-named AR down in the south west; a neat couple of small spots surr...
- Sat Feb 05, 2022 6:17 am
- Forum: Commercial Solar Filters/Cameras/Hardware
- Topic: Old PST safety
- Replies: 11
- Views: 1361
Re: Old PST safety
I agree with Mark, just enjoy what you have, and when you’re ready to move along the learning curve you can consider various options for the future. Unfortunately all are expensive!!!
- Sat Feb 05, 2022 4:54 am
- Forum: This is SolarChat !!
- Topic: WL Active Regions 05-02-22 ,Solar Newtonian
- Replies: 13
- Views: 538
Re: WL Active Regions 05-02-22 ,Solar Newtonian
Martin,
You got some good results there, notwithstanding the weather issues.
Well done mate.
You got some good results there, notwithstanding the weather issues.
Well done mate.
- Fri Feb 04, 2022 10:55 pm
- Forum: This is SolarChat !!
- Topic: WL activity 5th Feb 2022
- Replies: 6
- Views: 392
WL activity 5th Feb 2022
Plenty of activity visible -time to get those Baader film filters into action! AR 2936/38 about to leave us in the west, AR2939 dominates the central area with the smattering of small spots (AR2940) just above. The new AR 2941 coming in from the eastern limb is showing great promise! I think it's fa...
- Fri Feb 04, 2022 10:40 am
- Forum: This is SolarChat !!
- Topic: CaK activity 4th Feb 2022
- Replies: 12
- Views: 452
Re: CaK activity 4th Feb 2022
Thanks everyone, I appreciate your support.
- Fri Feb 04, 2022 12:33 am
- Forum: Solar Scope Modifications
- Topic: Applying a slight tilt to filters?
- Replies: 3
- Views: 1801
Applying a slight tilt to filters?
Anyone found a solution to applying a slight tilt (ghost removal) to filters? I have a 2" filter in a 2" focuser which needs a tilt...... So far I've been "cross threading" the filter and applying some BluTac to hold in in place. Seems to do the job, but doesn't look too safe. An...
- Fri Feb 04, 2022 12:29 am
- Forum: This is SolarChat !!
- Topic: CaK activity 4th Feb 2022
- Replies: 12
- Views: 452
CaK activity 4th Feb 2022
The active areas, showing very well formed sunspots, AR2936/38/39 and 2940 make a very nice layout. There's another large unnamed AR just coming into view in the north east - multiple spots... I used both the MiniSHG (see the proms) and the DIY Cak Filter on the Custom Vixen 90 (for the detail) Enjo...
- Thu Feb 03, 2022 7:50 am
- Forum: Commercial Solar Filters/Cameras/Hardware
- Topic: Experimenting calcium imaging with small refractors
- Replies: 53
- Views: 21563
Re: Experimenting calcium imaging with small refractors
What ever you consider, the f10 requirement I think is mandatory for any of the CaK filters.
- Wed Feb 02, 2022 8:44 am
- Forum: Commercial Solar Filters/Cameras/Hardware
- Topic: Experimenting calcium imaging with small refractors
- Replies: 53
- Views: 21563
Re: Experimenting calcium imaging with small refractors
Stephen,
I regularly use an ED80 stopped down to 60mm to give an f10 beam to the CaK filter.
Check out some of my results on the forum.
It certainly seems to work well for me.
My other alternative is my Custom Vixen 90/ 1000 which also works very well in CaK
I regularly use an ED80 stopped down to 60mm to give an f10 beam to the CaK filter.
Check out some of my results on the forum.
It certainly seems to work well for me.
My other alternative is my Custom Vixen 90/ 1000 which also works very well in CaK
- Tue Feb 01, 2022 3:54 am
- Forum: This is SolarChat !!
- Topic: Cheapest solar Ha solution
- Replies: 59
- Views: 1938
Re: Cheapest solar Ha solution
The Lunt 40mm Ha scope looks like offering an interesting introduction to Ha.
https://luntsolarsystems.com/product/lu ... telescope/
https://luntsolarsystems.com/product/lu ... telescope/
- Mon Jan 31, 2022 3:40 am
- Forum: This is SolarChat !!
- Topic: Walkthrough the CaK wavelength violet to red
- Replies: 13
- Views: 601
Re: Walkthrough the CaK wavelength violet to red
Peter,
You are correct. I could have taken many more images....next time.
I just wanted to show the relative changes between the K3, K2 and K1 regions of the Ca II K line.
Sorry, I had overlooked your earlier work.
You are correct. I could have taken many more images....next time.
I just wanted to show the relative changes between the K3, K2 and K1 regions of the Ca II K line.
Sorry, I had overlooked your earlier work.
- Mon Jan 31, 2022 3:18 am
- Forum: Commercial Solar Filters/Cameras/Hardware
- Topic: Antlia 1.25" Herschel wedge with 3nm CaK filter
- Replies: 12
- Views: 2924
Antlia 1.25" Herschel wedge with 3nm CaK filter
Interesting combo of a wedge plus a 3nm CaK filter.
http://www.antliafilter.com/pd.jsp?id=106
http://www.antliafilter.com/pd.jsp?id=106
- Sun Jan 30, 2022 12:05 pm
- Forum: Solar Scope Modifications
- Topic: Double Stack Lunt CaK filter
- Replies: 22
- Views: 5137
Re: Double Stack Lunt CaK filter
Thanks for that.
The image was then a stack of 40 x 10ms exposures =0.4 sec? gain=314
(The log file only shows 344 frames???)
The image was then a stack of 40 x 10ms exposures =0.4 sec? gain=314
(The log file only shows 344 frames???)
- Sun Jan 30, 2022 4:23 am
- Forum: Solar Radio, Magnetometry and Spectroscopy
- Topic: Found the next challenge! CN wavelength
- Replies: 15
- Views: 1800
Re: Found the next challenge! CN wavelength
Peter,
Thanks.
I'd already found the Sheeley references.
There are very few CN band images around for comparison.
Thanks.
I'd already found the Sheeley references.
There are very few CN band images around for comparison.
- Sat Jan 29, 2022 11:49 am
- Forum: Solar Scope Modifications
- Topic: Double Stack Lunt CaK filter
- Replies: 22
- Views: 5137
Re: Double Stack Lunt CaK filter
I use a 2" Baader Blue CCD filter (https://www.baader-planetarium.com/en/b ... blue).html ) with a 2" Astronomik L1 UV-IR filter as a ERF on the DIY CaK filter setup.
Can we get back on track and limit this discussion to Lunt filters and double stacking.
Thanks
Can we get back on track and limit this discussion to Lunt filters and double stacking.
Thanks
- Sat Jan 29, 2022 5:34 am
- Forum: Solar Reference Library
- Topic: Prom visibility across the CaK bandwidth
- Replies: 7
- Views: 2012
Prom visibility across the CaK bandwidth
The GIF shows the Proms as we move from the outer K1v (blue) wing, through the K2v then the core at K3 and out into the red wing. (There are some compression artefacts due to the reduction in the file size :( ) The distance from K1v to K1r is approx 1A The individual images (unprocessed) show the fi...
- Sat Jan 29, 2022 5:34 am
- Forum: This is SolarChat !!
- Topic: Prom visibility across the CaK bandwidth
- Replies: 7
- Views: 403
Prom visibility across the CaK bandwidth
The GIF shows the Proms as we move from the outer K1v (blue) wing, through the K2v then the core at K3 and out into the red wing. (There are some compression artefacts due to the reduction in the file size :( ) The distance from K1v to K1r is approx 1A The individual images (unprocessed) show the fi...
- Sat Jan 29, 2022 4:16 am
- Forum: Solar Radio, Magnetometry and Spectroscopy
- Topic: Found the next challenge! CN wavelength
- Replies: 15
- Views: 1800
Re: Found the next challenge! CN wavelength
Peter,
Thanks for the additional references.
The use of an old Lyot filter shows similarities to the narrowband MiniSHG results.
Thanks for the additional references.
The use of an old Lyot filter shows similarities to the narrowband MiniSHG results.
- Sat Jan 29, 2022 1:30 am
- Forum: Solar Scope Modifications
- Topic: Double Stack Lunt CaK filter
- Replies: 22
- Views: 5137
Re: Double Stack Lunt CaK filter
Oleg,
The Quark offering is a CaH filter, not CaK and is 5A bandwidth - double that of the Lunt.
https://www.teleskop-express.de/shop/pr ... ilter.html
The Quark offering is a CaH filter, not CaK and is 5A bandwidth - double that of the Lunt.
https://www.teleskop-express.de/shop/pr ... ilter.html
- Fri Jan 28, 2022 7:36 pm
- Forum: This is SolarChat !!
- Topic: Walkthrough the CaK wavelength violet to red
- Replies: 13
- Views: 601
Re: Walkthrough the CaK wavelength violet to red
Alexandra, All the images were obtained from one MiniSHG 18 sec 16 bit SER video. Matt and I have been playing with the INTI software to make it more robust in the selection of target lines. This allows more precise wavelength selection across the target line. I'm also preparing a similar animation ...
- Fri Jan 28, 2022 1:39 am
- Forum: This is SolarChat !!
- Topic: Walkthrough the CaK wavelength violet to red
- Replies: 13
- Views: 601
Re: Walkthrough the CaK wavelength violet to red
Thanks for the feedback!
I will process a similar series but showing the Proms in action and where the brightest proms can be found.
I will process a similar series but showing the Proms in action and where the brightest proms can be found.
- Thu Jan 27, 2022 7:29 pm
- Forum: This is SolarChat !!
- Topic: Walkthrough the CaK wavelength violet to red
- Replies: 13
- Views: 601
Walkthrough the CaK wavelength violet to red
I've prepared a GIF which walks through the CaK wavelength at a resolution of 0.18A. Starts way out in the K1violet wing (1A), creeps in until the K2v region, just outside the core (0.2 offset) then the core CWL and then the same points moving outwards into the red wing. I'm looking at ways and mean...
- Thu Jan 27, 2022 6:52 pm
- Forum: Solar Scope Modifications
- Topic: Double Stack Lunt CaK filter
- Replies: 22
- Views: 5137
Re: Double Stack Lunt CaK filter
I would be interested in seeing a photo of the filter setup. Also, if you could, at the next opportunity, collect an image in DS mode targeting any proms, recording the scope/ camera/ exposure/ stack and any other parameters. With the SHG I can map the solar surface and the visibility of the proms a...
- Thu Jan 27, 2022 3:29 am
- Forum: Solar Scope Modifications
- Topic: Double Stack Lunt CaK filter
- Replies: 22
- Views: 5137
Re: Double Stack Lunt CaK filter
OK.
Do you use two B1800 filters? If so how do you join and align them.
Do you remove any of the secondary filter elements?
Photos?
Do you use two B1800 filters? If so how do you join and align them.
Do you remove any of the secondary filter elements?
Photos?