Two more spectra from the last couple of clear nights

[NLO]

Finally getting used to using the star analyser and getting better at identifying the different lines.

Kate

[MikeWilson]

Awesome! What software is that from?

[Vega26]

That is very impressive, though I have to confess not much knowledge of the field of spectra. What equipment are you using to achieve these impressive results?

[NLO]

I used rspec, although i also have vspec which I am trying to learn how to use. Rspec was very easy to use and came with a set of videos to help set things up.

I took the images with a star analyser on the front of my SXVF MX916 through a cas 5inch.

Kate

[petek314]

Very impressive images with lots of detail. I use a Star Analyser with a meade DSI IIc and don't see anywhere near as much detail.

[NLO]

Thank you.

I'm not sure about the Meade chip size and capability, but i was told a black and white camera was better for detail than a colour one, not sure why, but if Merlin66 is around I'm sure he could give you more information.

Kate

[Merlin66]

Pete, Kate, et al,

You should get similar results with the DSI IIc, but unfortunately as Kate notes, the resolution of the colour chip (due to the Bayer colour matrix) is about 70% that on a similar mono camera.

You don't need a colour camera to generate a colour spectrum...when calibrated, a full colour version can be seen with one click of an icon!

The resolution of a SA100 (or the Rainbow Optics) grating really comes down to the spacing between the grating and the CCD chip - the greater the spacing, the greater the dispersion and the longer the spectrum image on the CCD. There are limitations - a bit like excess magnification when observing - where there is no further improvement, this is usually around the 70-80mm spacing.

I used the MX916 for a long time, as well as a DSI II (mono) - very good results. The Atik 314L I now use is even better!

Hope this helps.

[jsandse]

Some nice spectra you have there!

In addition to what Ken said if you want to get even more resolution out of your star analyser you can use a simple prism in front of it. This link gives details:

http://www.astrosurf.com/buil/staranalyser2/evaluation_en.htm

cheers

John

[NLO]

Hi all,

Thanks for the comments and suggestions. That website is great will read through all the information.

Kate