Abstract
Photographs of the Sun, recently obtained with a violet interference filter (λ ≃ 3840 Å), show the photospheric network (or photospheric faculae) with a contrast of typically 20% across the entire solar disk. Since this network is cospatial with photospheric magnetic fields, one is able to determine thepositions (not polarity) of these magnetic fields with fairly modest equipment. Furthermore, numerous dark structures and a faint dark network can be seen through the violet filter.
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References
Beckers, J. M. and Schröter, E. H.: 1968,Solar Phys. 4, 142.
Chapman, G. A. and Sheeley, N. R., Jr.: 1968,Solar Phys. 5, 442.
Kuz'minykh, V. D.: 1963,Soviet Astron. 7, 323.
Leighton, R. B.: 1959,Astrophys. J. 130, 366.
Minnaert, M., Mulders, G. F. W., and Houtgast, J.: 1940,Photometric Atlas of the Solar Spectrum, Schnabel, Amsterdam.
Öhman, Y.: 1950,Tellus 2, 255 (Stockholm Observatory Meddelande Nr. 65).
Rogerson, John B., Jr.: 1961,Astrophys. J. 134, 331.
Sheeley, N. R., Jr.: 1967,Solar Phys. 1, 171.
Simon, G. W.: 1966,Astrophys. J. 145, 411.
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Chapman, G.A. An interference filter for observing the photospheric network. Sol Phys 13, 78–84 (1970). https://doi.org/10.1007/BF00963943
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DOI: https://doi.org/10.1007/BF00963943