Some Be spectra around Ha region

[jnp]

I think  have ironed out a few more niggles with the latest DIY spectrometer. Replacing the 50mm SLR collimating lens with a Paul Rini 0.63 focal reducer has upped the resolution nicely.

Here are 3 Be star spectra captured on the 11th Jan. 10 Cas was quite challenging and needed 2x2 binning due to the low SNR.

Thanks for looking

John

[Merlin66]

Well done John!

It's always pleasing to see results from DIY spectroscopes.

BASS project is coming along nicely......

[jnp]

Thanks Ken,

My latest spectrometer construction trials involve a modular approach using black 65mm square downpipe from DIY stores.

The spectrometer body & grating housing consists of this http://www.wickes.co.uk/invt/158895

the 65 degree angle is not optimal but I couldn't resist, seeing how convenient it was.

The interchangeable slit and camera housings are made from these http://www.wickes.co.uk/invt/158867

Some aluminum strip provides bracing to stiffen it up.

Must try a Littrow next.

cheers

John

[Merlin66]

"So good - we have our name on it!"

Well done!