Astrometric Accuracy on Tautenburg Schmidt Plates

  • W. R. Dick
  • E. Schilbach
  • R.-D. Scholz
Conference paper


Using a big Schmidt telescope for astrometric purposes we take advantage of a coma free field with sharp images of all objects up to the 20th magnitude. The main disadvantage of a Schmidt telescope is in its relatively short focal length and the necessary bending of the photographic plate during exposition. It is reduced to a minimum in the case of the Tautenburg Schmidt telescope (134/200/401). We have a focal length comparable to that of astrometric astrographs (the scale is 51″/mm) and a relatively slight bending of the 24 x 24 cm plate covering a 3.°1 x 3.°1 field. On the other hand this is a relatively small field for a wide–field telescope so that a sky survey becomes too expensive, and the scale also gives no opportunity of defining highly accurate relative proper motions (p. m.), e. g. internal p. m. of stars in clusters, as is the aim of long focus astrographs. Therefore, we should concentrate on the determination both of positions of faint objects, e. g. extragalactic radio sources and of absolute p. m. of stars with respect to a great number of galaxies in selected areas, making in this way a contribution to the approximation of an inertial system.


Proper Motion Photographic Plate Plate Centre Reference Star Extragalactic Radio Source 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.


  1. Dick, W. R., Lorenz, H., Notni, P., Schilbach, E., Scholz, R.–D. and Richter, G. A.: 1986, Astron. Nachr., 307, 85.CrossRefADSGoogle Scholar
  2. Dick, W. R., Ruben, G., Schilbach, E. and Scholz, R.–D.: 1987, Astron. Nachr. 308, 211.CrossRefADSGoogle Scholar
  3. Klemola, A. R., Vasilevskis, S., Shane, C. D. and Wirtanen, C. A.: 1971, Publ. Lick Observ., vol. 22, part 2Google Scholar
  4. Rybka, S. P. and Yatsenko, A. I.: 1980, Astrometriya i Astrofizika 41, 64.ADSGoogle Scholar
  5. Schilbach, E.: 1982, Astron. Nachr. 303, 335.CrossRefADSGoogle Scholar
  6. Schilbach, E.: 1984, Untersuchung der Eigenbewegungen von Sternen durch Anschluß an ferne Galaxien auf Platten des Tautenburger 2m Schmidt—Teleskops, Dissertation, Potsdam, unpublished.Google Scholar
  7. Schilbach, E.: 1986, Astron. Nachr. 307, 61.CrossRefADSGoogle Scholar
  8. Schilbach, E.: 1987, Tartu Astrof. Obs. Publ., in press.Google Scholar
  9. Scholz, R.-D. and Rybka, S. P.: 1988, Astron. Nachr., in preparation.Google Scholar
  10. Yatsenko, A. I., Kur’yanova, A. N. and Dick, W. R.: 1987a, Astron. Nachr. 308, 71.CrossRefADSGoogle Scholar
  11. Yatsenko, A. I., Rybka, S. P. and Scholz, R.—D.: 1987b, Astron. Nachr. 308, No. 5, in press.Google Scholar

Copyright information

© Springer-Verlag Berlin Heidelberg 1988

Authors and Affiliations

  • W. R. Dick
    • 1
  • E. Schilbach
    • 1
  • R.-D. Scholz
    • 1
  1. 1.Zentralinstitut für AstrophysikAkademie der Wissenschaften der DDRPotsdam-BabelsbergGDR

Personalised recommendations