[ATM] Spectroscopy and fiber optic info needed

[dlwebb at canit.se (Dominic-Luc Webb)]

On Tue, 20 Jan 2004 jsgrmfg@gracemfg.com wrote:
>     I am pretty well locked into a CCD as a detector.  Financial
>     I am in rural northwest Arkansas.  The air here in the river valley is
> thick, moist, and seldom
> notable for its steadiness.  On the other hand, the only nearby towns are


These two are not totally compatible, but I am sure people manage. I think
with a lot of atmospheric turbulence, higher frequency, like 100 Hz is a
lot more desirable. Spectral analyzer would say for certain.

Have you considered instead of a spectrograph, a 13 color Johnson series?

Petford, A.D., Blackwell, D.E. Stellar integrated fluxes in
the wavelength range 380 NM - 900 NM derived from Johnson 13-colour
photometry. Astron. Astrophys. Suppl. Ser. 78. 511-517. 1989.


> a good CCD camera, I hope to be able to investigate objects in the 10 to 20
> mag. range.

Mag 10-13 is do-able with a 20". I think the higher mags might
depend on your F-ratio. Maybe someone else can give more details.


Dominic