Astronomy and Astrophysics – Astronomy
Scientific paper
Jul 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992sval...18..235k&link_type=abstract
Soviet Astronomy Letters, Vol. 18, p. 235; Pis'ma v Astronomicheskii Zhurnal (ISSN 0320-0108), vol. 18, no. 7, July 1992, p. 588
Astronomy and Astrophysics
Astronomy
6
Galactic Nuclei, Milky Way Galaxy, Stellar Spectra, X Ray Binaries, X Ray Spectra, Spaceborne Astronomy, Stellar Orbits, Stellar Rotation, X Ray Astronomy
Scientific paper
Lengthy (October 31, 1983-January 6, 1984) virtually continuous observations of the Galactic center region were carried out during the X-ray experiment on the high-apogee (720,000 km) Prognoz-9 mission. Processing via the method of 'epoch folding' of the time sets of 10-min-average counting rates in the keV energy range yielded frequency spectra of X-ray flux variations revealing previously unknown periods in the hour range, namely, 13, 9.4, 1.96, and 1.078 h.
Kudryavtsev Michail I.
Svertilov Sergey I.
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