Some results of the attestation of the Coude optical system of the 2-m Terskol observatory telescope

Details Some results of the attestation of the Coude optical system of the 2-m Terskol observatory telescope Some results of the attestation of the Coude optical system of the 2-m Terskol observatory telescope

Apr 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005kfnt...21..121b&link_type=abstract

Kinematika i Fizika Nebesnykh Tel, vol. 21, no. 2, p. 121-132

Physics

Scientific paper

We present some results of the attestation of the coude optical system of the 2-m Terskol Observatory telescope by Hartmann's method. All of the Zaidel aberrations (the spherical aberration, coma, and astigmatism) exist in the wavefront. On eliminating the aberrations by performing the adjustment for the telescope, the value d0.8 = 1'' (energy concentration is 80 %) can be achieved for star images. The presence of the triangular astigmatism in the residual aberrations which is prominent on the wavefront map can be explained as a result of the flexure of the tube and telescope unloading system. Our analysis of caustic curves shows that small-scale errors of the wavefront play the main role in the image degradation.

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