Astronomy and Astrophysics – Astronomy
Scientific paper
Oct 1981
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981pazh....7..537b&link_type=abstract
(Pis'ma v Astronomicheskii Zhurnal, vol. 7, Sept. 1981, p. 537-542.) Soviet Astronomy Letters, vol. 7, Sept.-Oct. 1981, p. 300-3
Astronomy and Astrophysics
Astronomy
1
Pulsars, Stellar Luminosity, Stellar Radiation, Supernovae, Variable Stars, Energy Transfer, Stellar Envelopes, Stellar Evolution, Stellar Rotation
Scientific paper
A search has been conducted with the 6-m telescope for optical variability in supernovae that appeared in 1979 in the galaxies NGC 4647 and NGC 4321. The MANIA (Multichannel Analysis of Nanosecond Intensity Alterations) instrumentation system was used. Throughout the time-scale range investigated, 10 to the -6th to 10 to the 2nd sec, variability is found to be absent. Any pulsar with a period of 0.001-0.1 sec that may correspond to the NGC 4647 supernova had an optical luminosity below 3 x 10 to the 40th erg sec; for the NGC 4321 supernova, below 2 x 10 to the 39th erg/sec (on the 60th and 300th day after maximum light, respectively). Some possible interpretations of the negative results of this search for extragalactic pulsars are discussed.
Beskin Gregory M.
Lebedev Sergei V.
Neizvestnyj S. I.
Plakhotnichenko V. L.
Shvartsman V. F.
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