January 4th Sun

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MapleRidge
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January 4th Sun

Post by MapleRidge » Sun Jan 06, 2019 1:09 am

Good day everyone...

I was fortunate to have another clear day on Friday (Jan 4th) and managed to get some time to image over the lunch hour. Seeing was typical for winter (poor, but not as bad as some days ;) ) and most of the images were usable with the exception of the prom shots.

The sequence started with full disk Ha thorough the LS80T/LS75FHa/B1200Ha solar scope. These composites were made form separate disk and limb images with PGR Grasshopper Express camera (ICX674 chip), shown with a variety of styles:
Full-Ha.jpg
Full-Ha.jpg (646.97 KiB) Viewed 277 times
Full-Ha-2.jpg
Full-Ha-2.jpg (645.14 KiB) Viewed 277 times
Full-Ha-3.jpg
Full-Ha-3.jpg (540.28 KiB) Viewed 277 times
Full-Ha-FC.jpg
Full-Ha-FC.jpg (1 MiB) Viewed 277 times
I did not get any full disk WL or CaK images, but I was able to get images of AR2732 at prime focus and through a 3x barlow on the iStar 150mm, f8 scope using the ASI 174MM camera. The WL images were through a Lunt solar wedge/Baader Continuum filter (sorry, image brightness is too high) :
CR150_WL_131209-ASI.jpg
CR150_WL_131209-ASI.jpg (354.46 KiB) Viewed 277 times
CR150_WL_131357-ASI.jpg
CR150_WL_131357-ASI.jpg (303.93 KiB) Viewed 277 times
The CaK images used a modified Lunt Solar Wedge/B1800CaK/Baader K-Line filter set:
CR150_CaKK_132041-ASI.jpg
CR150_CaKK_132041-ASI.jpg (315.84 KiB) Viewed 277 times
CR150_CaKK_132225-ASI.jpg
CR150_CaKK_132225-ASI.jpg (214.72 KiB) Viewed 277 times
The remaining images were taken through the modded CR-150/DSII/B1800Ha scope with a 3x tele-extender in front of the ASI174MM camera. The four images below show the views as you tune the DSII pressure tuner form 0PSI to 20PSI, where the 0PSI gives a WL view and 15PSI seems to be closest to on band based on the contrast of the features:
3x_CR150_DSII-0_123655-ASI.jpg
0 PSI
3x_CR150_DSII-0_123655-ASI.jpg (293.79 KiB) Viewed 277 times
3x_CR150_DSII-75_123745-ASIb.jpg
7.5 PSI
3x_CR150_DSII-75_123745-ASIb.jpg (351.26 KiB) Viewed 277 times
3x_CR150_DSII_123402-ASI.jpg
15 PSI
3x_CR150_DSII_123402-ASI.jpg (311.67 KiB) Viewed 277 times
3x_CR150_DSII-20_123850-ASI.jpg
20 PSI
3x_CR150_DSII-20_123850-ASI.jpg (297.86 KiB) Viewed 277 times
I cropped each of the full frame images to highlight AR2732 and laid them out in order in the pic below:
Tuning Sequence-2.jpg
Tuning Sequence-2.jpg (388.1 KiB) Viewed 271 times
To finish off, an animation was made form the four frames to show the changes as you proceed from 0 PSI (Continuum) to 7.5 PSI (Red Wing) through to 20 PSI (blue wing)...click to open:
Tuning-HD2.mp4
(209.43 KiB) Downloaded 15 times
Overall it was a good day at the scope :)

Questions and comments are always welcome,
Brian
Brian Colville

Maple Ridge Observatory

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Re: January 4th Sun

Post by ffellah » Sun Jan 06, 2019 1:39 am

A very nice set of images, Brian. It looks like you have a continued luck with the weather in 2019... I am jealous ;)

Franco

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Re: January 4th Sun

Post by MapleRidge » Sun Jan 06, 2019 2:09 am

Thanks for your feedback Franco :bow

We are only a few days into the new year, so I'm not sure if this is enough clear weather to set the trend for the next 360 days :lol:

Brian
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Re: January 4th Sun

Post by eroel » Sun Jan 06, 2019 4:31 pm

Brian:
Very nice session in spite of bad seeing.
I have the same problem at my home observatory, plus high contamination.
Best regards,
Eric.

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Re: January 4th Sun

Post by MapleRidge » Sun Jan 06, 2019 7:02 pm

Many thanks Eric...the feedback is always appreciated !!!

Brian
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Re: January 4th Sun

Post by MAURITS » Sun Jan 06, 2019 7:24 pm

Nice image session ...
Regards,
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Re: January 4th Sun

Post by marktownley » Sun Jan 06, 2019 8:46 pm

These are great Brian. Glad the weather has been obliging for you over the holiday period. I like the off band sequence.
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Re: January 4th Sun

Post by MapleRidge » Sun Jan 06, 2019 11:22 pm

Maurits and Mark...

Thanks for your comments and feedback guys, always appreciated :bow

I like to adjust the tuning and see what differences appear, but the Lunt makes the change very quick with the pressure tuner. Teh Daystar filters can be tuned, but takes more time than I have patience to stabilize the etalon after changing the set point ;)

Brian
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Re: January 4th Sun

Post by Astrophil » Mon Jan 07, 2019 1:55 am

Brian,
Great set of images and quite informative. I can see the rapid tuning via pressure is a big plus over the heated etalons I use. Twenty minutes to bring the Solar Spectrum up to temperature and about ten for the Quark.

Thanks,
Phil

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Re: January 4th Sun

Post by Valery » Mon Jan 07, 2019 3:37 am

Hi Brian,

Nice images. Especially the sequence of different CWL positions. Thanks for sharing.


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Re: January 4th Sun

Post by Valery » Mon Jan 07, 2019 3:44 am

Astrophil wrote:
Mon Jan 07, 2019 1:55 am
rapid tuning via pressure is a big plus over the heated etalons I use. Twenty minutes to bring the Solar Spectrum up to temperature and about ten for the Quark.

Thanks,
Phil
Hi Phil,

I always use tilt tuning etalon for quick overview of active areas with dark surges and streams. The same with large eruptive prominences. This shows how much the difference I can expect from the CWL scan.


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Re: January 4th Sun

Post by Montana » Mon Jan 07, 2019 10:26 am

Beautiful set as always Brian. I enjoyed the tuning images/animation again :bow what happened with the pattern noise in the CaK shot though? I have not seen this before.

Alexandra

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Re: January 4th Sun

Post by MapleRidge » Mon Jan 07, 2019 2:22 pm

Thanks Alexandra, I figured you would like the tuning set :bow

I can't explain the horizontal lines in the one CaK shot, but not the first I've seen them (thankfully only show up a limited number of times before). I will have to keep better track of the settings/conditions in the future.

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Re: January 4th Sun

Post by xn44 » Mon Jan 07, 2019 3:00 pm

Nice images!

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Re: January 4th Sun

Post by MapleRidge » Mon Jan 07, 2019 11:09 pm

Pedro and Pepe...

Thanks for your comments and feedback on this session, it is always appreciated!!!

Brian
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Re: January 4th Sun

Post by FMEnage » Tue Jan 08, 2019 11:38 pm

A fine set ! Brian

The interlaced artifact consistently happens to me, too, whenever I push fast exposures (<1ms)
-Mike

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Re: January 4th Sun

Post by Carbon60 » Wed Jan 09, 2019 10:36 am

You've been busy, Brian..... Nice set of images. The tuning sequence looks great.

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Re: January 4th Sun

Post by MapleRidge » Fri Jan 11, 2019 2:28 am

Mike and Stu...

Thanks fro your comments :bow

Mike, you raised an interesting point about the horizontal bands...I pretty much had to have the exposure as low as it would go to take the image. Will have to check this more closely next day its clear.

Brian
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