Astronomy and Astrophysics – Astrophysics
Scientific paper
Jan 1990
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990a%26a...227...77j&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 227, no. 1, Jan. 1990, p. 77-81. Research supported by FNRS and Polska Akademi
Astronomy and Astrophysics
Astrophysics
6
Amplitude Modulation, Atmospheric Attenuation, B Stars, Stellar Spectrophotometry, Variable Stars, Astronomical Observatories, Electrophotometers, Stellar Oscillations
Scientific paper
Photoelectric observations of the small-amplitude variable, carried out in 1973, 1979, 1987, and 1988, are presented. Attention is given to atmospheric extinction corrections, which are by no means negligible in most series of observations of the star. No evidence is found for the 0.096-day light variation of 53 Psc reported by other workers. Instead, it is shown that 34 Psc, one of the comparison stars used for 53 Psc by most observers, is slightly variable with a similar period. This, however, does not explain the large amplitude observed recently by Wolf (1987). The latter result is also difficult to understand in terms of a beat phenomenon. A peculiar amplitude modulation or transient variability may better account for all observations of the star.
Jerzykiewicz Mikolaj
Sterken Christiaan
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