Pressure and temperature stabilization of an existing Échelle spectrograph III

Anna Brucalassi, Tobias Feger, Frank Grupp*, Florian Lang-Bardl, Shao Ming Hu, Ulrich Hopp, Ralf Bender

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference proceeding contributionpeer-review

10 Citations (Scopus)


The Echelle spectrograph FOCES is currently located at the laboratories of Munich University Observatories under pressure and temperature stabilized conditions. It is being used as a test bed for a number of different stability issues related to high precision radial velocity spectroscopy. We utilize FOCES to study spectrograph stability, illumination stability and fiber transport stability. With this work we continue the series of papers that present our efforts to obtain temperature and pressure stabilization in the spectrograph environment. In particular we present first optical measurement results and compare them to simulations previously published. We show the movement of the image on the CCD with changes of pressure and temperature and the stability of the spot positions in the stabilized system using measurements done by a ThAr gas discharge source.

Original languageEnglish
Title of host publicationGround-Based and Airborne Instrumentation for Astronomy IV
Place of PublicationBellingham, Washington DC
Number of pages9
Publication statusPublished - 2012
Externally publishedYes
EventGround-Based and Airborne Instrumentation for Astronomy IV - Amsterdam, Netherlands
Duration: 1 Jul 20126 Jul 2012


OtherGround-Based and Airborne Instrumentation for Astronomy IV


  • Fiber coupling
  • Fiber mode scrambling
  • Fraunhofer telescope Wendelstein
  • Instrument stability
  • Planet finding
  • Radial velocity determination
  • Spectrographs


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