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TESOS, a double Fabry-Perot instrument for solar spectroscopy
M. Sigwarth and
Received 27 March 1998 / Accepted 31 July 1998
A double Fabry-Perot spectrometer in a telecentric configuration (TESOS: Telecentric Etalon SOlar Spectrometer) has been developed and installed in the Vacuum Tower Telescope at the Observatorio del Teide, Tenerife. The control system allows to switch from one wavelength band to another within 2 seconds. The telecentric configuration provides a constant wavelength passband across the field of view. Servo-stabilized etalons and a stable thermal environment provide a wavelength stability of 0.3 picometer per hour. We present initial results obtained with this instrument.
Key words: Sun: particle emission Sun: magnetic fields instrumentation: spectrographs instrumentation: interferometers
© European Southern Observatory (ESO) 1998
Online publication: November 9, 1998