[vsnet-alert 18546] ASASSN-15gn, possible ugwz type CV

Berto Monard bmonard at mweb.co.za
Wed Apr 15 23:01:50 JST 2015

More than 2 weeks into its bright outburst, ASASSN-15gn has at last started to
show a cyclic modulation with a period of around 0.0630d (+/- 0.0004d) and 0.3CR
in range.

Periods for the possible superhump cycle were determined by the Peranso software
using several methods. 
The period given above was derived as the mean of those periods and the spread of
results was used to estimate the standard deviation.
The initial mean magnitude of 14.0 has gradually dropped to 15.4.

This CV deserves further monitoring with timeseries observations, but weather
around here is not promising.

The above report is based on timeseries with an unfiltered CCD of ASASSN-15gn on
14-15 Apr 2015 and on several earlier nights in April 2015 at CBA Kleinkaroo

Berto Monard / CBA Kleinkaroo

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