Liot type birefrigent filter Ca II (K) with 1.2 A passband

Location expedition GAISH MGU : Latitude = 51deg 43'00'' , Longitude = - 140deg 10'12''

T₁ = 2^h36^m08^s , T₂ = 3^h55^m07.6^s, T₃ = 3^h57^m14.7^s, T₄ = 5^h14^m08^s

Delta T = 127.1^s

t_exp = 1/500, 1/250, 1/125, 1/60, 100 s; film "Mikrat-300", "H"

1. E.V. Kononovich, Yu.A. Kupryakov, O.B. Smirnova, "Photometry of the Prominence Using the Results of the Total Solar Eclipse on 1981 july 31", Solnechnye Dannje 4, 104, 1983.
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2. A.U. Volokhov, E.V. Kononovich, Yu.A. Kupryakov, D.K. Nadegin, O.B. Smirnova, "The observations of the total solar eclipce 31 July, 1981 in K CaII line" in "The results of observations of the full solar eclipce July 31 1981 ",VAGO, M, 64-67, 1986.
3. E.V. Kononovich, Yu.A. Kupryakov, O.B. Smirnova, "Solar corona in the K CaII line derived from observations of the 31 July 1981 total solar eclipse " , Publ. GAISH, v.62, 2, 39-49, 1994.