A challenge - spectrohelioscope

[Merlin66]

How would you like to image the Sun in any chosen wavelength - with a bandwidth resolution of <0.5A
Hydrogen, Helium, Calcium, Iron - you name it, you can do!
Daniel Defourneau has been developing his scanning system since 2002 and many others have joined him.
Fred Veio has built and uses a conventional mechanical spectrohelioscope - for over forty years!
Much easier to build than a double stacked hydrogen alpha scope and the available wavelengths are endless.

[swisswalter]

Hi Ken

great. Can you show us what a typical result is from "watching" with a spectrohelioscope

[Merlin66]

http://www.astrosurf.com/spectrohelio/t ... shg-en.php
http://astrosurf.com/rondi/obs/shg/index.htm

These links should help get you started!

[swisswalter]

Hi Ken

great documentations. I like to read them. Understanding it, is something else ;-)

[marktownley]

Looks good Ken! Another project for me to fiddle around with - Dang!!! :silly:

[solarchat]

Ill take one.

[Merlin66]

http://www.astrosurf.com/spectrohelio/shg_video-en.php

The more I think about the costs and limited usefulness of a CaK filter, the more I come back to the spectrohelioscope....
I have 90% of the necessary bits, and I think I must try it out before spending even more money on scopes/ filters.
http://www.astrosurf.com/spectrohelio/doppler-en.php

The 2min aquisition time (siderial scanning)seems to be a concern, so I'll look at mounting the SHG on the NEQ6 for a faster scanning rate....Gives me something to think about while waiting around airports!!