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Start Over Creator Plavec, M.

1. Period changes of the eclipsing binary RW Tauri

Creator:
Plavec, M.
Format:
bez média and svazek
Type:
model:article and TEXT
Subject:
observations and eclipsing binary RW Tauri
Language:
Czech
Description:
239 observed minima up to 1959 are collected and discussed. It is found that before 1925 the period may have varied periodically, while after 1925 it has remained practically constant. The appearance of the curve of the residuals as well as rough calculations make it improbable that the period variations could be explained in terms of apsidal or nodal motion or presence of a third body. It is more probable that an actual change in the true period took place.
Rights:
http://creativecommons.org/publicdomain/mark/1.0/ and policy:public

2. Photographic photometry of the comet Arend-Roland 1956h in integral light

Creator:
Růžičková, B. and Plavec, M.
Format:
bez média and svazek
Type:
model:article and TEXT
Subject:
photographic photometry, integral ligt, and comets
Language:
Czech
Description:
15 sets of isophotae of the comet Arend-Roland are presented. They were obtained from photographs taken with the double astrograph of the Ondřejov Observatory. The method of reductions is briefly described. A list of 16 other plates of good or medium quality, not reduced here, is addied. The striking features of the comet´s appearance during the days April 27 to May 2 are quite briefly discussed. The isophotae describe the appearance of the comet on blue and panchromatic plates to a distance of 2°-3° from the head.
Rights:
http://creativecommons.org/publicdomain/mark/1.0/ and policy:public