Hi Everyone.
Weather and seeing conditions cooperated nicely for two consecutive days, the 3rd and 4th of August. On the 3rd, I managed a productive session with the spectroheliograph and am slowly processing the images. Here, I'm presenting the full disk in the light of the calcium ion at three wavelengths: the K line (3934 A), the H line (3968 A) and one of the infrared triplet lines (8498 A). This was the first time imaging in the infrared and poor planning led me to image the 8498 A component of the triplet as opposed to the stronger 8542 A line.
To my eye, the full disk view shows no obvious differences among the three lines. It's possible that the infrared triplet lines have something different to offer at higher image resolution but it's unlikely I'll be able to spot any differences with my instrument. I'll have to give the stronger triplet line a go in the future but need a new filter to accomplish this. Some order sorting with an Edmund Optics 850nm 10nm bandpass filter was required for the present image and the 8542 A line was right at the filter cutoff edge.
Hope you enjoy this preliminary output from the August 3rd session.
Cheers.
Peter
August 3, 2020: Calcium Trio
- Carbon60
- Way More Fun to Share It!!
- Posts: 14209
- Joined: Wed Mar 07, 2012 12:33 pm
- Location: Lancashire, UK
- Has thanked: 8418 times
- Been thanked: 8165 times
Re: August 3, 2020: Calcium Trio
Very nice, Peter. Amazingly similar across the spectrum.
Stu.
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/
- Montana
- Librarian
- Posts: 34563
- Joined: Mon Oct 17, 2011 5:25 pm
- Location: Cheshire, UK
- Has thanked: 17672 times
- Been thanked: 8793 times
Re: August 3, 2020: Calcium Trio
Wonderful images Peter, but I can't see much difference between the different calcium lines on the large scale.
Alexandra
Alexandra
- Valery
- Way More Fun to Share It!!
- Posts: 4059
- Joined: Sun Nov 18, 2012 3:13 pm
- Has thanked: 156 times
- Been thanked: 893 times
Re: August 3, 2020: Calcium Trio
Hi Peter,
Very impressive results.
Yes, I still hope that with a narrower slit you will be able to detect some filamentary-like structures which makes
8542.1A images as a mixture of Ca and Ha images.
Keep my fingers crossed and wish you a luck. If you will accomplish this chanllenge task then this will be historical event
in amateur solar astrinomy. Go ahead!
Valery
Very impressive results.
Yes, I still hope that with a narrower slit you will be able to detect some filamentary-like structures which makes
8542.1A images as a mixture of Ca and Ha images.
Keep my fingers crossed and wish you a luck. If you will accomplish this chanllenge task then this will be historical event
in amateur solar astrinomy. Go ahead!
Valery
"Solar H alpha activity is the most dynamic and compelling thing you can see in a telescope, so spend accordingly." (c) Bob Yoesle.
Largest full size 185 - 356mm Dielectric Energy Rejection Filters (D-ERF) by ARIES Instruments.
Largest full size 185 - 356mm Dielectric Energy Rejection Filters (D-ERF) by ARIES Instruments.