Abstract

Described is a major new tool for solar research, conceived and built during a time of budget restraint. The observation of magnetic and velocity (circulation) field structure on a synoptic basis and with diffraction-limited resolution is the aim. New optical features include the use of oversize mirrors and windows (to avoid thermal edge effects) and the placement of the coelostat feed outside the vacuum, mainly for economy. The site selected has prevailing winds that clear thermals from these mirrors. Test data in the form of the system MTF and optical transmission, together with examples of full disk magnetograms and photoheliograms, show present performance capability. Measured MTF indicates a response of 0.2 at 1 sec of arc (whereas diffraction-limited response would be ∼0.8). System transmission, including the accompanying spectrograph, is only 2–3% (λ0.44–1.1 μm). Thus, both the optical quality and efficiency are subject to improvement.

© 1976 Optical Society of America

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  1. R. B. Dunn, Space Res. 12, 1657 (1972).
  2. R. B. Dunn, Sky Telesc. 38, 368 (1969).
  3. R. B. Dunn, J. B. Zirker, Solar Phys. 33, 281 (1973).
  4. J. P. Mehltretter, Solar Phys. 38, 43 (1974).
    [CrossRef]
  5. E. B. Mayfield, D. Vrabec, E. Rogers, T. Janssens, R. A. Becker, Sky Telesc. 37, 208 (1969).
  6. C. E. Coulman, Solar Phys. 34, 491 (1974).
    [CrossRef]
  7. G. E. Hale, S. B. Nicholson, Carnegie Inst. Washington Publ. 498, Part 1 (1938).
  8. D. Schrage, AURA Eng. Tech. Rept. 56 (1975).
  9. R. E. Loughhead, R. J. Bray, E. J. Tappere, J. G. Winter, Solar Phys. 4, 185 (1968).
    [CrossRef]
  10. P. ten Bruggencate, F. W. Jager, Veröff. Univ. Sternw. Göttingen 101 (1951).
  11. R. Brahde, “The Tower Telescope of the Oslo Solar Observatory, Harestua,” Report 23, Institute of Theoretical Astrophysics, Oslo (1967).
  12. E. T. Pearson, AURA Eng. Tech. Repts. 27, 32, 33, 44, 49, 50, 52, 53, 54, 55 (1970–74).
  13. W. Livingston, J. Harvey, C. Slaughter, D. Trumbo, submitted to Appl. Opt. (1975).
  14. I. Ghozeil, J. E. Simmons, Appl. Opt. 13, 1773 (1974).
    [CrossRef] [PubMed]
  15. Solar-Geophysical Data 361, Part 1 1974) (continuing to date), U.S. Dept. of Commerce.

1974

J. P. Mehltretter, Solar Phys. 38, 43 (1974).
[CrossRef]

C. E. Coulman, Solar Phys. 34, 491 (1974).
[CrossRef]

I. Ghozeil, J. E. Simmons, Appl. Opt. 13, 1773 (1974).
[CrossRef] [PubMed]

1973

R. B. Dunn, J. B. Zirker, Solar Phys. 33, 281 (1973).

1972

R. B. Dunn, Space Res. 12, 1657 (1972).

1969

R. B. Dunn, Sky Telesc. 38, 368 (1969).

E. B. Mayfield, D. Vrabec, E. Rogers, T. Janssens, R. A. Becker, Sky Telesc. 37, 208 (1969).

1968

R. E. Loughhead, R. J. Bray, E. J. Tappere, J. G. Winter, Solar Phys. 4, 185 (1968).
[CrossRef]

1951

P. ten Bruggencate, F. W. Jager, Veröff. Univ. Sternw. Göttingen 101 (1951).

Becker, R. A.

E. B. Mayfield, D. Vrabec, E. Rogers, T. Janssens, R. A. Becker, Sky Telesc. 37, 208 (1969).

Brahde, R.

R. Brahde, “The Tower Telescope of the Oslo Solar Observatory, Harestua,” Report 23, Institute of Theoretical Astrophysics, Oslo (1967).

Bray, R. J.

R. E. Loughhead, R. J. Bray, E. J. Tappere, J. G. Winter, Solar Phys. 4, 185 (1968).
[CrossRef]

Coulman, C. E.

C. E. Coulman, Solar Phys. 34, 491 (1974).
[CrossRef]

Dunn, R. B.

R. B. Dunn, J. B. Zirker, Solar Phys. 33, 281 (1973).

R. B. Dunn, Space Res. 12, 1657 (1972).

R. B. Dunn, Sky Telesc. 38, 368 (1969).

Ghozeil, I.

Hale, G. E.

G. E. Hale, S. B. Nicholson, Carnegie Inst. Washington Publ. 498, Part 1 (1938).

Harvey, J.

W. Livingston, J. Harvey, C. Slaughter, D. Trumbo, submitted to Appl. Opt. (1975).

Jager, F. W.

P. ten Bruggencate, F. W. Jager, Veröff. Univ. Sternw. Göttingen 101 (1951).

Janssens, T.

E. B. Mayfield, D. Vrabec, E. Rogers, T. Janssens, R. A. Becker, Sky Telesc. 37, 208 (1969).

Livingston, W.

W. Livingston, J. Harvey, C. Slaughter, D. Trumbo, submitted to Appl. Opt. (1975).

Loughhead, R. E.

R. E. Loughhead, R. J. Bray, E. J. Tappere, J. G. Winter, Solar Phys. 4, 185 (1968).
[CrossRef]

Mayfield, E. B.

E. B. Mayfield, D. Vrabec, E. Rogers, T. Janssens, R. A. Becker, Sky Telesc. 37, 208 (1969).

Mehltretter, J. P.

J. P. Mehltretter, Solar Phys. 38, 43 (1974).
[CrossRef]

Nicholson, S. B.

G. E. Hale, S. B. Nicholson, Carnegie Inst. Washington Publ. 498, Part 1 (1938).

Pearson, E. T.

E. T. Pearson, AURA Eng. Tech. Repts. 27, 32, 33, 44, 49, 50, 52, 53, 54, 55 (1970–74).

Rogers, E.

E. B. Mayfield, D. Vrabec, E. Rogers, T. Janssens, R. A. Becker, Sky Telesc. 37, 208 (1969).

Schrage, D.

D. Schrage, AURA Eng. Tech. Rept. 56 (1975).

Simmons, J. E.

Slaughter, C.

W. Livingston, J. Harvey, C. Slaughter, D. Trumbo, submitted to Appl. Opt. (1975).

Tappere, E. J.

R. E. Loughhead, R. J. Bray, E. J. Tappere, J. G. Winter, Solar Phys. 4, 185 (1968).
[CrossRef]

ten Bruggencate, P.

P. ten Bruggencate, F. W. Jager, Veröff. Univ. Sternw. Göttingen 101 (1951).

Trumbo, D.

W. Livingston, J. Harvey, C. Slaughter, D. Trumbo, submitted to Appl. Opt. (1975).

Vrabec, D.

E. B. Mayfield, D. Vrabec, E. Rogers, T. Janssens, R. A. Becker, Sky Telesc. 37, 208 (1969).

Winter, J. G.

R. E. Loughhead, R. J. Bray, E. J. Tappere, J. G. Winter, Solar Phys. 4, 185 (1968).
[CrossRef]

Zirker, J. B.

R. B. Dunn, J. B. Zirker, Solar Phys. 33, 281 (1973).

Appl. Opt.

Sky Telesc.

R. B. Dunn, Sky Telesc. 38, 368 (1969).

E. B. Mayfield, D. Vrabec, E. Rogers, T. Janssens, R. A. Becker, Sky Telesc. 37, 208 (1969).

Solar Phys.

C. E. Coulman, Solar Phys. 34, 491 (1974).
[CrossRef]

R. E. Loughhead, R. J. Bray, E. J. Tappere, J. G. Winter, Solar Phys. 4, 185 (1968).
[CrossRef]

R. B. Dunn, J. B. Zirker, Solar Phys. 33, 281 (1973).

J. P. Mehltretter, Solar Phys. 38, 43 (1974).
[CrossRef]

Space Res.

R. B. Dunn, Space Res. 12, 1657 (1972).

Veröff. Univ. Sternw. Göttingen 101

P. ten Bruggencate, F. W. Jager, Veröff. Univ. Sternw. Göttingen 101 (1951).

Other

R. Brahde, “The Tower Telescope of the Oslo Solar Observatory, Harestua,” Report 23, Institute of Theoretical Astrophysics, Oslo (1967).

E. T. Pearson, AURA Eng. Tech. Repts. 27, 32, 33, 44, 49, 50, 52, 53, 54, 55 (1970–74).

W. Livingston, J. Harvey, C. Slaughter, D. Trumbo, submitted to Appl. Opt. (1975).

G. E. Hale, S. B. Nicholson, Carnegie Inst. Washington Publ. 498, Part 1 (1938).

D. Schrage, AURA Eng. Tech. Rept. 56 (1975).

Solar-Geophysical Data 361, Part 1 1974) (continuing to date), U.S. Dept. of Commerce.

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