Description
GK Persei, an intermediate polar cataclysmic variable, is surrounded by a supernova remnant. Its most recent period of activity was reported in December 2022, during which it was suggested to be undergoing an outburst similar to that of a dwarf nova. GK Persei was observed in February 2023 from the San Pedro Mártir Observatory in Mexico using OPTICAM, a triple-channel fast optical system developed through a collaboration between the University of Southampton and UNAM, while the event was still at its peak activity. Additional observations were conducted in December 2023, during quiescence. Here, we present high-cadence, multi-band observations of the recent outburst of GK Persei with OPTICAM, capturing a brightness variation of over one order of magnitude from outburst to quiescence, along with significant intranight variability. We report several simultaneous X-ray spectra obtained during both states and present preliminary results from the Fabry-Perot scanning interferometry study of the GK Persei nova shell, aimed at investigating the current expansion state of the remnant.
