Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 1985
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985pazh...11..803c&link_type=abstract
(Pis'ma v Astronomicheskii Zhurnal, vol. 11, Nov. 1985, p. 803-810) Soviet Astronomy Letters (ISSN 0360-0327), vol. 11, Nov.-Dec
Astronomy and Astrophysics
Astronomy
1
Astronomical Spectroscopy, Galactic Nuclei, Seyfert Galaxies, Ubv Spectra, Electrophotometry, Emission Spectra, H Beta Line, Spectral Line Width
Scientific paper
154 spectrograms of the NGC 1275 galaxy nucleus were obtained for 83 dates from 1972 to 1982. The observations were carried out in the spectral region near Hβ and [O III] λλ4959, 5007 (N2 and N1) lines. The equivalent widths of W(Hβ) and W(N1+N2) with the accuracy of about ±20% were determined. It is found that their variations appeared synchronously in a wide range and with nearly identical amplitudes ΔW/W. Joint consideration of W(Hβ) and W(N1+N2), on one hand, and of the results of photoelectric observations in the V system on the other hand lead to the conclusion on constancy of the radiation flux in Hβ and [O III] lines and large dimension (>3 pc) of the regions where both lines originate.
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