Third Results Alpy600

[EdWiley]

I think I am making progress. Comments welcome.

Ed

[Ken Harrison]

Ed,
Looks good to me!
I think you've got the setting pretty spot on.
Have you processed this image yet?

[Olivier Thizy]

I think I am making progress. Comments welcome.

Ed

Ed,


excellent image. The spectrum is slightly doubled which can either be a guiding "swinging back and forth" effect or a small telecope defocus. But franckly, you have there already lot of information on the star itself.


You can go to the next step to reduce your spectrum by extracting the profile and calibrate it both in wavelength (using the Belmer lines if you do not have any calibration lamp; complementing it with some absorption lines from a cooler star such as a G-type star would help) and in intensity (ie: instrumental response correction).


You can also record several stars of miscelenous spectral types and look at the differences event without reducing the spectra, just by looking at the 2D images. A very good reference is Richard Walker atlas:
http://www.ursusmajor.ch/astrospektrosk ... index.html
more specifically: http://www.ursusmajor.ch/downloads/spek ... as-4.0.pdf

and François Teyssier document on low resolution spectroscopy:
http://www.astronomie-amateur.fr/Docume ... ion_En.pdf

But I may state here the obvious - sorry if this is the case...


Cordialement,
Olivier Thizy
Vous ne verrez plus des étoiles comme avant !
http://www.shelyak.com/en/

[EdWiley]

Thanks Ken and Olivier! Olivier -- nothing is obvious to a beginner. The "slightly doubled" comment is especially helpful as are the other comments. I will be doing the reductions soon and will post the results. As I have several images, I can screen out the "doubles."

Cheers, Ed