Fig. 5

image

Dynamic spectra of the burst from CR Dra detected during the 2014-06-02 observation in Stokes I (first panel from top), Q (second panel), U (third panel), and V (bottom panel) formed directly from calibrated visibilities. The time and frequency resolution of the dynamic spectra are 8.05 s and 78.1 kHz. A Gaussian filter with a standard deviation of 1.5 pixels has been applied. The burst saturates at ≈205, ≈80, ≈-90, and ≈198 mJy, in Stokes I, Q, U, and V. The detection of emission from the burst in Stokes Q and U implies the emission is elliptically polarised at least part of the time. The rms noise in the Stokes I dynamic spectrum is 16 mJy, while it is 12 mJy for the Stokes Q, U, and V dynamic spectra. The colour bars on the right communicate the flux density scale for each Stokes parameter. The thin white/dark blue bar centred on ≈169.7 MHz represents bandwidth that has been excised due to RFI.

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