First Light of RISTRETTO Spectro

16-02-2026 #

First Light of RISTRETTO Spectro #

After installing the container and completing all the connections, we were rewarded with the instrument’s first light, despite the poor weather conditions.

Assembly
First result on Arcturus

Assembly
We signed the traditionnal first light’s bottle

Assembly
Pointing Pollux
Assembly
Software currently being improved

After three weeks of observing and testing, we brought RISTRETTO back to Geneva to continue the characterization of the spectrograph and explore possible improvements.

We are very pleased with the results of the OHP tests, which proved both useful and conclusive.