Outburst activity in magnetic cataclysmic variables BY Cam and QQ Vul

Astronomy and Astrophysics – Astrophysics

Scientific paper

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Scientific paper

Flare properties in magnetic cataclysmic variables BY Cam and QQ Vul are determined based on the observations obtained at AZT-11 and the Shain mirror telescope of the Crimean Astrophysical Observatory. The UBVRI AZT-11 photometry demonstrates a wide range of color properties of these events. There are significant differences between the flare amplitudes in BY~Cam and QQ~Vul. The correlation coefficient between the flare amplitude and smoothed brightness variations of QQ~Vul is of about 0.83. Similar dependence for the flares of BY~Cam is not detected. Some values of the cross-correlation ``brightness-polarization" are as large as 0.7. There are no significant differences between the colors of observed flares, as for instance, one could expect for possible ``accretion" and ``red dwarf" flares.

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