Ultraviolet observations and the extended spectrum of NGC 4151

Details Ultraviolet observations and the extended spectrum of NGC 4151 Ultraviolet observations and the extended spectrum of NGC 4151

Aug 1978

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978apj...223..798w&link_type=abstract

Astrophysical Journal, Part 1, vol. 223, Aug. 1, 1978, p. 798-802. Research sponsored by the Dutch Committee for Geophysics and

Physics

Geophysics

21

Astronomical Spectroscopy, Galactic Nuclei, Seyfert Galaxies, Ultraviolet Spectra, H Beta Line, Quasars, Radio Spectra, X Ray Spectra

Scientific paper

Five-channel ultraviolet photometry of the Seyfert galaxy NGC 4151 was obtained at three epochs with the ANS. These data are combined with other recent results to illustrate the spectrum of the nucleus of NGC 4151 from 34 microns to 20 MeV, with corrections for galaxy contamination. It is found that no other part of the spectrum has a slope like the best-fitting power law for the X-rays. The C IV emission-line flux is measured; the C IV/H-beta ratio is between 5 and 8, which is similar to the ratio in quasars.

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