August 3, 2020 Spectroheliograms: the Fraunhofer Four
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August 3, 2020 Spectroheliograms: the Fraunhofer Four
Hi Everyone.
Slowly working through the processing of my August 3 spectroheliograms.
Here is a montage of the Sun as it appears (very differently) in four of the Fraunhofer lines.
AR12768 offered a great opportunity to view the extensive plage in the four different lights.
Cheers.
Peter.
(Ooops! I neglected to orient these correctly. They are left-right inverted with respect to the true disk orientation.)
Slowly working through the processing of my August 3 spectroheliograms.
Here is a montage of the Sun as it appears (very differently) in four of the Fraunhofer lines.
AR12768 offered a great opportunity to view the extensive plage in the four different lights.
Cheers.
Peter.
(Ooops! I neglected to orient these correctly. They are left-right inverted with respect to the true disk orientation.)
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Re: August 3, 2020 Spectroheliograms: the Fraunhofer Four
Thought I would add these images which include the prominences.
The H alpha and Ca K images show inverted disks with proms while the HeD3 image shows the normal disk with proms.
Cheers.
Peter
The H alpha and Ca K images show inverted disks with proms while the HeD3 image shows the normal disk with proms.
Cheers.
Peter
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Re: August 3, 2020 Spectroheliograms: the Fraunhofer Four
Wow! these are fantastic Peter, certainly best viewed in full size
Have you ever looked in the Aluminium line? a chap on Facebook took an image and was wondering what he was seeing as not much is published about the features in this region. The only person I know imaging in this line is John (Highfnum).
Alexandra
Have you ever looked in the Aluminium line? a chap on Facebook took an image and was wondering what he was seeing as not much is published about the features in this region. The only person I know imaging in this line is John (Highfnum).
Alexandra
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Re: August 3, 2020 Spectroheliograms: the Fraunhofer Four
Very interesting and detailed images, Peter.
If I want to build a spectroheliograph by myself where should I start from ? Being a physicist I know the theory but I need some practical advice. Thanks
If I want to build a spectroheliograph by myself where should I start from ? Being a physicist I know the theory but I need some practical advice. Thanks
Raf
My solar images and reports with articles on solar equipment
My solar images and reports with articles on solar equipment
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Re: August 3, 2020 Spectroheliograms: the Fraunhofer Four
Thanks Alexandra and Raf.
Alexandra:
My feeling is that the Aluminum line (I'm assuming the one at 3961.5 angstroms) would give an image very similar to a Ca H or K image taken in the line wings or taken with broader spectral linewidth (a Baader K-line filter for example). I haven't taken the time to image this one myself for this reason. It is a strong line though so might offer something different. I think I captured this line in my August 3rd session so I'll take a look at it.
Raf:
For a start, I would recommend the book by Ken Harrison (Harrison (2015) “Imaging Sunlight using a Digital Spectroheliograph”, Springer "Practical Astronomy" Series.) as an introduction and broad overview of the devices that have been constructed by amateurs. I have written articles about my own instrument for the Royal Astronomical Society of Canada (Zetner, Peter (2015) “An Amateur Spectroheliograph”, Journal of the Royal Astronomical Society of Canada v109, no.4, pg.151.) and for the Vereinigung der Sternfreunde Fachgruppe Spektroskopie (Zetner, Peter (2017) “Solar Imaging with a Spectroheliograph”, Spektrum Nr.52 – 2017 available online at http://spektroskopie.vdsastro.de/files/ ... trum52.pdf). Personally, I have found the website of Philippe Rousselle (http://www.astrosurf.com/spectrohelio/index-en.php) enormously helpful as well as that of Andre and Sylvain Rondi (http://www.astrosurf.com/rondi/obs/shg/index.htm). Feel free to ask questions here. By the way, I'm a physicist myself, retired in 2016.
Cheers.
Peter
Alexandra:
My feeling is that the Aluminum line (I'm assuming the one at 3961.5 angstroms) would give an image very similar to a Ca H or K image taken in the line wings or taken with broader spectral linewidth (a Baader K-line filter for example). I haven't taken the time to image this one myself for this reason. It is a strong line though so might offer something different. I think I captured this line in my August 3rd session so I'll take a look at it.
Raf:
For a start, I would recommend the book by Ken Harrison (Harrison (2015) “Imaging Sunlight using a Digital Spectroheliograph”, Springer "Practical Astronomy" Series.) as an introduction and broad overview of the devices that have been constructed by amateurs. I have written articles about my own instrument for the Royal Astronomical Society of Canada (Zetner, Peter (2015) “An Amateur Spectroheliograph”, Journal of the Royal Astronomical Society of Canada v109, no.4, pg.151.) and for the Vereinigung der Sternfreunde Fachgruppe Spektroskopie (Zetner, Peter (2017) “Solar Imaging with a Spectroheliograph”, Spektrum Nr.52 – 2017 available online at http://spektroskopie.vdsastro.de/files/ ... trum52.pdf). Personally, I have found the website of Philippe Rousselle (http://www.astrosurf.com/spectrohelio/index-en.php) enormously helpful as well as that of Andre and Sylvain Rondi (http://www.astrosurf.com/rondi/obs/shg/index.htm). Feel free to ask questions here. By the way, I'm a physicist myself, retired in 2016.
Cheers.
Peter
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Re: August 3, 2020 Spectroheliograms: the Fraunhofer Four
These are really remarkable images, Peter. Superb.
Where do you intend to go from here? Larger aperture for closer views?
Stu.
Where do you intend to go from here? Larger aperture for closer views?
Stu.
H-alpha, WL and Ca II K imaging kit for various image scales.
Fluxgate Magnetometers (1s and 150s Cadence).
Radio meteor detector.
More images at http://www.flickr.com/photos/solarcarbon60/
Fluxgate Magnetometers (1s and 150s Cadence).
Radio meteor detector.
More images at http://www.flickr.com/photos/solarcarbon60/
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Re: August 3, 2020 Spectroheliograms: the Fraunhofer Four
Than you very much Peter, I am starting with the book and your own articles, surely I will return with furter questions
Raf
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Re: August 3, 2020 Spectroheliograms: the Fraunhofer Four
Peter, always incredibly impressed with your work. Thanks for sharing here.
http://brierleyhillsolar.blogspot.co.uk/
Solar images, a collection of all the most up to date live solar data on the web, imaging & processing tutorials - please take a look!
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Re: August 3, 2020 Spectroheliograms: the Fraunhofer Four
Hi Peter, I liked "Solar Imaging with a Spectroheliograph: Part 1". Where can I find Part 2 ? Or is it still in progress?
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Re: August 3, 2020 Spectroheliograms: the Fraunhofer Four
Fantastic Peter !!
Christian Viladrich
Co-author of "Planetary Astronomy"
http://planetary-astronomy.com/
Editor of "Solar Astronomy"
http://www.astronomiesolaire.com/
Co-author of "Planetary Astronomy"
http://planetary-astronomy.com/
Editor of "Solar Astronomy"
http://www.astronomiesolaire.com/
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Re: August 3, 2020 Spectroheliograms: the Fraunhofer Four
4 lights! That's awesome work Peter!
Lunt 8x32 SUNoculars
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Meade Coronado AZS Alt/Az Mount
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Visual Observer
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Orion 70mm Solar Telescope
Celestron AstroMaster Alt/Az Mount
Meade Coronado SolarMax II 60 DS
Meade Coronado SolarMax II 90 DS
Meade Coronado AZS Alt/Az Mount
Astro-Tech AT72EDII with Altair solar wedge
Celestron NexStar 102GT with Altair solar wedge
Losmandy AZ8 Alt/Az Mount
Sky-Watcher AZGTI Alt-Az GoTo mount
Cameras: ZWO ASI178MM, PGR Grasshopper, PGR Flea
Lunt, Coronado, TeleVue, Orion and Meade eyepieces
Visual Observer
" Way more fun to see it! "