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- W2892250434 abstract "We present optical photometric and spectroscopic observations of three SU UMa-type dwarf novae, i.e. AR Pic, QW Ser and V521 Peg, conducted in 2016 and 2017. These sources were selected from the Catalina Real-Time Transient Survey and observed during quiescence, outburst (AR Pic and QW Ser) and superoutburst (V521 Peg). For AR Pic, strong flickering in the light curves and an asymmetric double-peaked H$beta$ emission line in the spectra, confirmed the presence of a very active hot spot. During outburst, detected on 18 February 2017, it exhibited a $sim 3.3$ magnitude brightening. The projected velocity of the inner edge of the accretion disc is $sim 2000 rm~km~s^{-1}$. An outburst of QW Ser was detected on 8 August 2016. Absorption lines, characteristic of an optically thick disc during outburst, were detected and an outflow velocity of $sim 1000 rm ~km~s^{-1}$ was determined. Optical spectra during the superoutburst of V521 Peg were obtained for the first time, confirming the superoutburst nature of the outburst, as also observed in other SU UMa-type dwarf novae. The superoutburst was detected on 1 September 2017. Well-defined superhumps were observed, with an average superhump period of $P_{rm sh} sim 1.48$ hr. A mass ratio of $q sim 0.14$ was determined from the period excess of $varepsilon sim 3 %$." @default.
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- W2892250434 date "2018-07-06" @default.
- W2892250434 modified "2023-09-27" @default.
- W2892250434 title "Transient emission of selected CRTS Cataclysmic Variables" @default.
- W2892250434 doi "https://doi.org/10.22323/1.315.0021" @default.
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