Computer Science
Scientific paper
Jun 1982
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982esasp.176..589b&link_type=abstract
In ESA 3rd European IUE Conf. p 589-591 (SEE N83-11889 02-88)
Computer Science
3
Bl Lacertae Objects, Emission Spectra, Quasars, Compton Effect, Infrared Spectra, Radio Spectra, Synchrotron Radiation, Ultraviolet Spectra, Visible Spectrum, X Ray Spectra
Scientific paper
Ultraviolet spectra simultaneous with radio, infrared, optical, and X-ray measurements were obtained for 0735+178, BL Lac, IZw-187, and 3C466. These spectra indicate that the synchrotron emission probably becomes optically thick in the mm or far infrared region. The IR-UV continua of 0735+178 and IZw-187 are simple power laws of slope near unity. In contrast, the continua in BL Lac and 3C446 steepen sharply between the IR and UV regions. This implies that the electron distribution is sharply cut off at some maximum energy. The X-ray emission in BL Lac, 3C446, and 0735+178 is probably produced by the inverse Compton process. However, synchrotron radiation is the probable source of X-ray emission in the X-ray bright BL Lac object IZw-187.
Bregman Joel N.
Glassgold Alfred E.
Huggins Patrick J.
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