Sep 2008
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008aan...384....1t&link_type=abstract
AAVSO Alert Notice 384
Other
Gk Per, Cataclysmic Variable, Multiwavelength, Aavso International Database
Scientific paper
As reported in AAVSO Special Notice #125, the cataclysmic variable GK Persei appears to be entering another outburst. The object began a slow rise on or about 2008 September 10 UT, rising nearly one magnitude above its typical quiescent level of m(vis) = 13, to near m(vis) = 12.2 at present (2008 September 24 UT). This rate of brightening is typical of past outbursts, and suggests a rise to full outburst may occur soon. However, this activity comes much sooner than expected based on past intervals between outbursts, and the last outburst (2006 December 5) reached a much fainter maximum than normal, about m(vis)=11.5, more than one magnitude fainter than the typical m(vis)=10.5-10.0. Observers are asked to closely follow GK Persei at all wavelengths during the current outburst, however it may evolve. Both visual and filtered CCD photometry are strongly encouraged. Observations should be submitted to the AAVSO International Database as GK PER.
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