The Big SHG from Down Under -- Maurice's 100mm f/9

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Re: The Big SHG from Down Under -- Maurice's 100mm f/9

Post by Alun_H »

rsfoto wrote: Mon Jun 05, 2023 4:50 pm Hi Alun,
That scope must have a [hot place] of backfocus :shock:
Hi Rainer,
I had shortened the tube so as to work with my PST mod,plus the scope originally had a 1.25" focuser but managed to adapt a 2" job to fit :)

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Re: The Big SHG from Down Under -- Maurice's 100mm f/9

Post by thesmiths »

Maurice wrote to tell me that he is hoping to install a stepper motor to rotate the grating to predetermined positions. He also sent a nice image, taken in the Australian winter.

H-alpha, Maurice's big SHG, 12 June 2013
H-alpha, Maurice's big SHG, 12 June 2013
120623_Ha_MPV_pm_sml.jpg (1.04 MiB) Viewed 2615 times


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Re: The Big SHG from Down Under -- Maurice's 100mm f/9

Post by rsfoto »

Hi,

Excellent image and I am still struggling with my mount for slewing 8X or 16X :(


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Re: The Big SHG from Down Under -- Maurice's 100mm f/9

Post by christian viladrich »

Amazing !

The D3 image is probably one of the best I've ever seen !


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Re: The Big SHG from Down Under -- Maurice's 100mm f/9

Post by thesmiths »

christian viladrich wrote: Wed Jun 14, 2023 9:35 am The D3 image is probably one of the best I've ever seen!
Maurice told to me that he developed a special Photoshop process to display the Helium image. He writes:
Reading some of Peter Zetner's old posts, he suggested that the 'professionals' divide the He frame by the continuum frame to obtain clear He distribution information. I did this but the result was rather duo-tone and pretty horrible.

Looking at Christian Buil's tutorial he suggested 'subtracting' the continuum image from the He frame and then stretching the result. This was better but still not great.

I then played around with some of Photoshop's layering methods (including 'difference' and 'subtract' combinations with different 'fill' levels). Results attached (my favourite result, helium D3 ps diff method2).
helium_D3_ps_diff_method2_sml.jpg
helium_D3_ps_diff_method2_sml.jpg (378.8 KiB) Viewed 2578 times


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Re: The Big SHG from Down Under -- Maurice's 100mm f/9

Post by thesmiths »

I attach a few more SHG images from Down Under.
I had a very good imaging session on Sunday morning for a couple of hours and managed some data in five different wavelengths. It is interesting to see the differences between the images. Numbers of scans used for each image is within file name.

I was surprised to pick up some prominence activity in the Na D2 data as I had not observed them there before.

The continuum image was from a 50 pixel (approx. 5 angstrom) shift towards longer wavelengths from the Ha line.

Maurice
180623_Ha_small5frames.jpg
180623_Ha_small5frames.jpg (1.34 MiB) Viewed 2541 times
170623_Ca_small4frames.jpg
170623_Ca_small4frames.jpg (949.23 KiB) Viewed 2541 times
170623_Hb_small6frames.jpg
170623_Hb_small6frames.jpg (996.47 KiB) Viewed 2541 times
170623_Na_small8frames.jpg
170623_Na_small8frames.jpg (1.35 MiB) Viewed 2541 times
170623_Mg_small6frames.jpg
170623_Mg_small6frames.jpg (922.39 KiB) Viewed 2541 times
180623_cont_small4frames.jpg
180623_cont_small4frames.jpg (831.33 KiB) Viewed 2541 times


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Re: The Big SHG from Down Under -- Maurice's 100mm f/9

Post by DeepSolar64 »

It's nice to see all the different wavelengths here. Even Magnesium is included. There is a lot to be gleaned from lesser used wavelengths. Those besides Ha, continuum and CaK.


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Re: The Big SHG from Down Under -- Maurice's 100mm f/9

Post by rsfoto »

Hi,

Excellent images. Better then many others taken with etalons.


regards Rainer

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Re: The Big SHG from Down Under -- Maurice's 100mm f/9

Post by thesmiths »

Maurice sent me two new images he took today (in Melbourne, Australia) with his 100mm aperture SHG. He said there were some high clouds but at least he's got some sun (unlike many of us in the northern hemisphere). He's currently testing out the new mounting method for my chrome on quartz slits; so far, so good.

H-alpha SHG, 28 Nov 2023
H-alpha SHG, 28 Nov 2023
Ha_281123_sml.jpg (1.06 MiB) Viewed 1854 times
CaH SHG, 28 Nov 2023
CaH SHG, 28 Nov 2023
CaH_281123_sml.jpg (1 MiB) Viewed 1854 times


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Re: The Big SHG from Down Under -- Maurice's 100mm f/9

Post by marktownley »

Brilliant! Not sure how I missed this thread!


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Re: The Big SHG from Down Under -- Maurice's 100mm f/9

Post by Montana »

oh my!!! :bow :bow :bow

Alexandra


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Re: The Big SHG from Down Under -- Maurice's 100mm f/9

Post by thesmiths »

Maurice sent me a recent image (21-11-2023) taken with good seeing from Oz. This is 10 frames from 20 scans, stacked with AS!3, then treatment with Astrosurface. It looks quite perfect to me.

211223_Ha_comb.jpg
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Re: The Big SHG from Down Under -- Maurice's 100mm f/9

Post by marktownley »

That is impressive!


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Re: The Big SHG from Down Under -- Maurice's 100mm f/9

Post by thesmiths »

Since we in the northern hemisphere have limited solar visibility (winter Solstice!), I attach a new image from Maurice taken in Australia. Taken in the morning of Christmas Eve, local time. Best 12 of 25 scans stacked in AS!3 then deconvolution with Astrosurface. Seeing was quite good, estimated at 2 to 2.5 arcsec.

231223_lat_Ha_small.jpg
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Re: The Big SHG from Down Under -- Maurice's 100mm f/9

Post by marktownley »

Maurice knocks out some good images, Thanks for sharing Doug!


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Re: The Big SHG from Down Under -- Maurice's 100mm f/9

Post by DeepSolar64 »

Agreed!!


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Re: The Big SHG from Down Under -- Maurice's 100mm f/9

Post by astroshot »

Absolutely fabulous!


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Re: The Big SHG from Down Under -- Maurice's 100mm f/9

Post by thesmiths »

Here is a rather spectacular image taken on 31 Dec 2023, showing the very bright X5 solar flare.

H-alpha SHG. 100mm aperture. Stack of 30 of 50 scans. Data collected between 21:37 and 22:02 UTC.
H-alpha SHG. 100mm aperture. Stack of 30 of 50 scans. Data collected between 21:37 and 22:02 UTC.
311223_Ha_30frames_MPV.jpg (1.02 MiB) Viewed 930 times


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Re: The Big SHG from Down Under -- Maurice's 100mm f/9

Post by solarchat »

wow!


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Re: The Big SHG from Down Under -- Maurice's 100mm f/9

Post by DeepSolar64 »

Very nice! I am glad you caught it with an SHG equipped scope.


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Re: The Big SHG from Down Under -- Maurice's 100mm f/9

Post by thesmiths »

Here is the latest image from down under. Data collected late in the day between 17:30 and 18:00 local time on January 17.

Best 16 of 27 frames stacked is AS!3 and processed in Astrosurface.
Best 16 of 27 frames stacked is AS!3 and processed in Astrosurface.
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Re: The Big SHG from Down Under -- Maurice's 100mm f/9

Post by DeepSolar64 »

That is a really nice SHG image. Beautiful detail and superb contrast!!


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Re: The Big SHG from Down Under -- Maurice's 100mm f/9

Post by inhapi »

What slit does he use ?


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Re: The Big SHG from Down Under -- Maurice's 100mm f/9

Post by thesmiths »

inhapi wrote: Thu Feb 01, 2024 4:06 pm What slit does he use ?
See the very first sentence of the beginning of this post.


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Re: The Big SHG from Down Under -- Maurice's 100mm f/9

Post by thesmiths »

I think I will not be doing any further imaging myself until March. In the meantime, here are some more nice images taken from Australia on the morning (local time) of 27 January. I think the Ca-K looks particularly good.

260124_Ha_am_11frames_full2.jpg
260124_Ha_am_11frames_full2.jpg (1.01 MiB) Viewed 401 times
260124_Hb_am_5frames_full.jpg
260124_Hb_am_5frames_full.jpg (1.03 MiB) Viewed 401 times
260124_CaK_6frames_full.jpg
260124_CaK_6frames_full.jpg (1.04 MiB) Viewed 401 times


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Re: The Big SHG from Down Under -- Maurice's 100mm f/9

Post by marktownley »

They do look good!


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Re: The Big SHG from Down Under -- Maurice's 100mm f/9

Post by thesmiths »

Here is a rather nice Ca-H image taken from Australia on the morning of 2 Feb. Maurice says: "My best seeing seems to occur around 8am to 9am... My solar scintillation monitor told me my seeing was varying between about 1.9 and 2.6 arcsec."

This image is worth opening up in a new tab to examine all the fine structure. It's a really good example of high-resolution Calcium imaging.

Ca-H stack of 8 frames.
Ca-H stack of 8 frames.
020224_CaH_8frames_MPV.jpg (1.02 MiB) Viewed 111 times


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Re: The Big SHG from Down Under -- Maurice's 100mm f/9

Post by DeepSolar64 »

WoW, this is very narrowband. Certainly dead opposite of the wide band 3nm filter I use. Look at those filaments on the disc!!

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