Photometric and polarimetric study of two BL Lac objects

Details Photometric and polarimetric study of two BL Lac objects Photometric and polarimetric study of two BL Lac objects

Jan 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985afz....22...15m&link_type=abstract

(Astrofizika, vol. 22, Jan.-Feb. 1985, p. 15-23) Astrophysics (ISSN 0571-7132), vol. 21, no. 1, July 1985, p. 7-13. Translation.

Astronomy and Astrophysics

Astrophysics

4

Astronomical Photometry, Bl Lacertae Objects, Extragalactic Radio Sources, Linear Polarization, Periodic Variations, Polarimetry, Astronomical Photography, Brightness Distribution, Interstellar Magnetic Fields, Polarization Characteristics, Wavelengths

Scientific paper

The results are given of polarimetric and photometric observations of the BL Lac objects OI 090.4 over the period 1979-1982 and B2 1418 + 54 over the period 1980-1982. For both objects it was noted that there was variability on a time scale of from several years to several days. The comparison of the polarimetric parameters indicates the existence of a preferred direction of polarization both for B2 1418 + 54 (theta/0/ = 120 deg), and for OI 090.4 (theta/0/ = 50 deg), which points to a stable magnetic field. For OI 090.4 it was observed that there was a certain dependence of the polarization parameters on the wavelength.

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