Linear Polarization of OVV Quasar 3C 345 in the Ultraviolet Observed with the Hubble Space Telescope

Details Linear Polarization of OVV Quasar 3C 345 in the Ultraviolet Observed with the Hubble Space Telescope Linear Polarization of OVV Quasar 3C 345 in the Ultraviolet Observed with the Hubble Space Telescope

Dec 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993aas...183.5604b&link_type=abstract

American Astronomical Society, 183rd AAS Meeting, #56.04; Bulletin of the American Astronomical Society, Vol. 25, p.1382

Astronomy and Astrophysics

Astronomy

Scientific paper

Measurements of the linear polarization of 3C 345, an OVV quasar with superluminal motion, were obtained with the High Speed Photometer aboard the Hubble Spae Telescope in two UV bandpasses on April 6-7 1993. These measurements are compared with ground-based optical measurements taken 11 days following the HSP observations. The polarization, which decreases with increasing frequency from the I to U bandpasses, reverses this trend and increases in the UV. If the two observation sets represent the same state of spectral polarization, then either the polarization of the synchrotron continuum must increase significalntly in the UV, or there is a second source of polarized flux in 3C 345 in the ultraviolet.

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