view Abstract Citations (14) References (36) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS A Broad-Band Contemporaneous Study of the Seyfert Galaxy NGC 4151 Bassani, L. ; Butler, R. C. ; Di Cocco, G. ; Della Ventura, A. ; Perotti, F. ; Villa, G. ; Baker, R. E. ; Dean, A. J. ; Lee, T. J. Abstract 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. Publication: The Astrophysical Journal Pub Date: December 1986 DOI: 10.1086/164802 Bibcode: 1986ApJ...311..623B Keywords: Astronomical Spectroscopy; Gamma Ray Spectra; Infrared Spectra; Seyfert Galaxies; Ultraviolet Spectra; X Ray Spectra; Luminosity; Radiant Flux Density; Visible Spectrum; Astrophysics; GALAXIES: INDIVIDUAL NGC NUMBER: NGC 4151; GALAXIES: SEYFERT; GAMMA RAYS: GENERAL; INFRARED: SOURCES; ULTRAVIOLET: SPECTRA; X-RAYS: SOURCES full text sources ADS | data products SIMBAD (1) NED (1) MAST (1) INES (1)