Detection of the First Obeserved Outburst of DW Cancri

Details Detection of the First Obeserved Outburst of DW Cancri Detection of the First Obeserved Outburst of DW Cancri

Jun 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008javso..36...60c&link_type=abstract

The Journal of the American Association of Variable Star Observers, vol. 36, no. 1, p. 60

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Scientific paper

Using data gathered by amateur astronomers from several nations, as reported to the American Association of Variable Star Observers (AAVSO), the first observed outburst of the intermediate polar DW Cancri was detected on January 25, 2007, at magnitude V ~11.36. This represented a brightening of ~4 magnitudes from both recent measurements and long term average quiescence. The outburst was of a relatively short duration, as measured from the first detection of the outburst, showing a fading of ~2.25 magnitudes in ~27 hours, and another ~1.25 magnitudes within the next ~30 hours. Follow up photometric observations show the asynchronous rotation period of the magnetic white dwarf star of this system to be 38.6 minutes, in agreement with previous studies; a strong secondary signal of ~73.7 minutes was also noted. As to whether or not the outburst was the result of disk instabilities or caused by a mass transfer event, no conclusion could be reached.

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