Multifrequency observations of the optically violent variable quasar 1156 + 295

Details Multifrequency observations of the optically violent variable quasar 1156 + 295 Multifrequency observations of the optically violent variable quasar 1156 + 295

Jun 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982esasp.176..577g&link_type=abstract

In ESA 3rd European IUE Conf. p 577-580 (SEE N83-11889 02-88)

Physics

1

Blazars, Luminosity, Quasars, Ultraviolet Spectra, Variability, Infrared Spectra, Iue, Radio Spectra, Synchrotron Radiation, Visible Spectrum

Scientific paper

A large outburst in the quasar 1156+295 in which B increased to 13.2 M is discussed. Short and long wavelength spectra were obtained on three occasions when the object was very bright, and which were separated by intervals of 4 and 60 days. The UV continuum in all cases is a power law with slope close to -2.0. No spectral features are apparent in the UV. Observations were made at radio, infrared, and optical frequencies within hours of IUE measurements. The overall multifrequency spectra become progressively less steep as the wavelength increases, and probably turn over in the far infrared. The shape of the spectrum changes little at optical and ultraviolet wavelengths.

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