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Speckle Observations of Triple Stars

Published online by Cambridge University Press:  12 April 2016

Syuzo Isobe  and
Naoshi Baba
Syuzo Isobe
Affiliation:
National Astronomical Observatory, Mitaka – shi, Tokyo 181, Japan
Naoshi Baba
Affiliation:
Faculty of Engineering, Hokkaido University, Sapporo, Hokkaido, Japan

Extract

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Our speckle observations were started in 1987 using a 212-cm telescope at San Pedro Martir Observatory in Mexico. A D-IMOSS camera was used until 1990 and an I-CCD camera was introduced in 1991. The old camera has only 0″.20 angular resolution because of an aging effect in its intensifier, while the new camera has 0″.06 angular resolution, which is nearly equal to the diffraction limit of the telescope. 128 visual binary stars and 755 spectroscopic binary stars have been observed. The numbers of stars and observations each year are shown in Table 1 and all the observed data are given in a series of papers by Isobe et al. (1990a, 1990b, 1992a) and Miura et al. (1992).

Type
High Resolution At Visual Wavelengths
Information
International Astronomical Union Colloquium , Volume 135: Complementary Approaches to Double and Multiple Star Research , 1992 , pp. 555 - 557
Copyright
Copyright © Astronomical Society of the Pacific 1992

References

Heints, W.D. 1978, in Double Stars (Dordrecht, D. Reidel), p. 16 Google Scholar
Hirshfeld, A. & Sinnott, R.W. 1985, in Sky Catalogue 2000.0, (Cambridge, Cambridge University Press), vol. 2 Google Scholar
Isobe, S. 1992, Australian J. Astron., Conference Series, in pressGoogle Scholar
Isobe, S., Baba, N., Miura, N., & Ohtsubo, J. 1992b, ASP Conf. Series, in pressGoogle Scholar
Isobe, S., Norimoto, Y., Noguchi, M., Ohtsubo, J., Baba, N., Miura, N., Yanaka, H., & Tanaka, T. 1990a, Pub. Nat. Astron. Obs. Japan, 1, 217 Google Scholar
Isobe, S., Norimoto, Y., Noguchi, M., Ohtsubo, J., Baba, N., Miura, N., Yanaka, H., & Tanaka, T. 1990b, Pub. Nat. Astron. Obs. Japan, 1, 318 Google Scholar
Isobe, S., Noguchi, M., Ohtsubo, J., Baba, N., Miura, N., Tanaka, T., & Ni-ino, M. 1992a, Pub. Nat. Astron. Obs. Japan, 2, 459 Google Scholar
Miura, N., Baba, N., Isobe, S., Ohtsubo, J., & Ni-ino, M. 1992, Pub. Nat. Astron. Obs. Japan, in pressGoogle Scholar
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