A broad-band contemporaneous study of the Seyfert galaxy NGC 4151

Details A broad-band contemporaneous study of the Seyfert galaxy NGC 4151 A broad-band contemporaneous study of the Seyfert galaxy NGC 4151

Dec 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986apj...311..623b&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 311, Dec. 15, 1986, p. 623-631.

Astronomy and Astrophysics

Astrophysics

13

Astronomical Spectroscopy, Gamma Ray Spectra, Infrared Spectra, Seyfert Galaxies, Ultraviolet Spectra, X Ray Spectra, Luminosity, Radiant Flux Density, Visible Spectrum

Scientific paper

The authors observed the Seyfert galaxy NGC 4151 on 1980 May 18 at hard X-ray/low gamma-ray energies using the MISO telescope. No gamma-ray signal was found between 100 keV and 16 MeV and only a 3.5 σ signal was detected in the hard X-ray detector in the energy range 35 - 105 keV. Concurrently with this measurement, a program of ultraviolet and infrared observations was organized. Contemporaneous observations are also available in the optical and soft X-ray (2 - 10 keV) spectral regions. These observations are used to discuss the spectrum and the variability of NGC 4151 over a wide range of frequencies.

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