Using the spectral line maps that I made yesterday viewtopic.php?t=41126, I was able today to image four of the Hydrogen Balmer lines in a single session using a 80ED 600mm focal length telescope with my foamboard SHG. This setup still needs some tuning up so the top and bottom edges of the solar disk are not completely sharp. Nevertheless, this is a slightly easier instrument to rapidly and accurately tune the wavelength vs my higher resolution (and lower distortion) dovetail SHG (with 106mm aperture APO triplet refractor).
I started off with H-gamma (which somehow turned out the worse), followed by H-beta, H-delta and finally H-alpha. I scanned in RA and had some mount scanning problems, which meant I lost around half the scans in one direction. The image below shows the four wavelengths in a mosaic (all the images are rotated to bring the solar equator approximately horizontal). The Hydrogen beta, gamma and delta SHG images notably look quite similar. Beta shows prominences more strongly than gamma and delta. The data presented here is reduced by 50% from the original size but still benefits from opening in a new tab to see at higher resolution.
Hydrogen alpha, beta, gamma and delta SHG images -- 9 June
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Hydrogen alpha, beta, gamma and delta SHG images -- 9 June
Last edited by thesmiths on Fri Jun 09, 2023 11:12 pm, edited 1 time in total.
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Re: Hydrogen alpha, beta, gamma and delta SHG images -- 9 June
I attach the H-alpha and H-beta as individual images (50% reduction, cropped slightly).
Last edited by thesmiths on Fri Jun 09, 2023 11:12 pm, edited 1 time in total.
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Re: Hydrogen alpha, beta, gamma and delta SHG mosaic -- 9 June
Fantastic results !! thats amazing !
spectro-coronographe ,Bresser 127/1200 ; Bresser 102/1350 , ASI 178MM
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Re: Hydrogen alpha, beta, gamma and delta SHG images -- 9 June
I am intrigued by the H-delta, as I have not seen an image in this line before. I decided to make a GIF to show the differences between the delta and beta lines.
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Re: Hydrogen alpha, beta, gamma and delta SHG images -- 9 June
Fascinating! I guess it makes sense that the visual differences become progressively less in correlation with the wavelengths getting progressively closer together.
Kevin
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Re: Hydrogen alpha, beta, gamma and delta SHG images -- 9 June
Hi,
Well done
Well done
regards Rainer
Observatorio Real de 14
San Luis Potosi Mexico
North 22° West 101°
Observatorio Real de 14
San Luis Potosi Mexico
North 22° West 101°
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Re: Hydrogen alpha, beta, gamma and delta SHG images -- 9 June
as you go up in energy level some features start to fade away
makes sense
makes sense
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Re: Hydrogen alpha, beta, gamma and delta SHG images -- 9 June
Great set of images Douglas. Was going to give these lines a go myself today but my EQ6 refused to scan properly right from the outset.
Alun
Alun
Lunt 50THa solar scope
Lunt CaK B12 module
SW Evostar 72ED for full disk imaging
Sol'Ex SHG
80mm f/7 achromat used with pressure tune module off the Lunt with Lunt 100mm ERF
Bresser 90 f/10 achromat used for CaK & white light imaging & PST mod with Lunt 100mm ERF
Coronado SM40 (pre Meade) and BF10 filter set + SMII 60 richview DS etalon
Skywatcher EQ6 Pro and Ioptron CEM60
Then there is all the night kit which is far too long a list to write up here!
More images on view on my Flickr page...https://www.flickr.com/photos/alun_h/
Lunt CaK B12 module
SW Evostar 72ED for full disk imaging
Sol'Ex SHG
80mm f/7 achromat used with pressure tune module off the Lunt with Lunt 100mm ERF
Bresser 90 f/10 achromat used for CaK & white light imaging & PST mod with Lunt 100mm ERF
Coronado SM40 (pre Meade) and BF10 filter set + SMII 60 richview DS etalon
Skywatcher EQ6 Pro and Ioptron CEM60
Then there is all the night kit which is far too long a list to write up here!
More images on view on my Flickr page...https://www.flickr.com/photos/alun_h/
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Re: Hydrogen alpha, beta, gamma and delta SHG images -- 9 June
Christian Buil looked at these images and made the interesting suggestion that if you look away from the centre of the H-alpha line, you should see images that look like H-beta, H-gamma, H-delta. I found this intriguing. I therefore took a series of pixel shifted images around the H-alpha line and found at 11 pixels, the image does resemble the other Balmer lines. I blended the +11 and -11 pixel shifted H-alpha image and put result side by side with the H-gamma stacked image. There is a strong similarity between the two. Using SIMSPEC SHG, I calculated the dispersion of the spectrometer I used is 0.052 angstrom/pixel. So the blended 11 pixel shift image above corresponds to +/- 0.57 angstrom.
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Re: Hydrogen alpha, beta, gamma and delta SHG images -- 9 June
Douglas!!! I could make you SPOD every day for pushing the boundaries of solar imaging
Alexandra
Alexandra