Photopolarimetry of Seyfert galaxy MK 509

Details Photopolarimetry of Seyfert galaxy MK 509 Photopolarimetry of Seyfert galaxy MK 509

Apr 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993ap%26ss.202..161t&link_type=abstract

Astrophysics and Space Science (ISSN 0004-640X), vol. 202, no. 1, p. 161-171.

Astronomy and Astrophysics

Astrophysics

4

Astronomical Photometry, Astronomical Polarimetry, Light Curve, Markarian Galaxies, Seyfert Galaxies, Brightness Distribution, Emission Spectra, Visible Spectrum

Scientific paper

We present the first truly simultaneous UBVRI photopolarimetric observations of the Seyfert galaxy Markarian 509. The photometric light curves show small amplitude variations in timescales of days. These variations are largest in the U-band and smallest in the/-band, indicating that the variations are due to a decline in the synchrotron emission from the galactic nucleus. We measured a constant one per cent polarization. A small frequency dependence was observed in the polarization during some of the nights. No frequency dependence was seen in the position angle. These observations indicate that Markarian 509 is similar to 3C 273, i.e., a blazar.

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