Sunken Mill Spectrographs

SMEtte Echelette Spectrograph

The current instrument is a prototype that was build quickly to test the principle. It works remarkably well, but has a low throughput. Up to 2012 the instrument was slitless, then a reflective slit + guiding unit was attached.

See here for more instrument info

Observations (under construction)

SMEtte first light skylight spectrum

SMAGS Grating Spectrograph

SMAGS is primarily intended as a low resolution grating spectrograph, for observations of faint objects.

However, it is adaptable enough to be used with intermediate resolutions up to R=4000

 

See here for more info

 

neon spectrum
Neon spectrum with green filter to suppress the strong red lines

Slitless Prism Spectrograph

This was my first spectrograph, built in 2008. The construction principles, using lightweight materials, I still use today. The instrument was sacrificed and converted into the SMEtte prototype.

See here for more info