Active Extragalactic Sources: Nearly Simultaneous Observations from 20 Centimeters to 1400 Angstrom
Landau, Robert; Golisch, Bill; Jones, Terry J.; Jones, T. W.; Pedelty, Jeffrey; Rudnick, Lawrence; Sitko, Michael L.; Kenney, Jeff; Roellig, Tom; Salonen, Erkki; Urpo, Seppo; Schmidt, Gary; Neugebauer, Gerry; Matthews, Keith; Elias, J. H.; Impey, C.; Clegg, P.; Harris, S.
United States, Finland
Abstract
IRAS, IUE, and ground-based optical, NIR, mm and submm, and radio observations obtained mainly on Apr. 9-23, 1983, are reported for 19 active extragalactic sources and eight control sources. The overall spectra of the compact active sources are shown to be well represented by continuous-curvature functions such as parabolas. The spectra are found to be consistent with models involving continuous particle injection (with synchrotron losses) or first-order Fermi acceleration (with escape and synchrotron losses), but not with models using relativistic Maxwellian electron distributions.