[vsnet-chat 363] re (vsnet-chat 359) More on V485 Cen

["Jan Hers" <janhers@pixie.co.za>]

Taichi Kato wrote:
According to the description in Glasby's famous "The Dwarf Novae" the star
is described as "..a very short mean period of about 10 days has been
assigned to it.  There is still some uncertainty about this period and
further observational data are needed  in order to confirm it or otherwise
since, if found to be accurate, it is the shortest mean period of all the U
Geminorum variables".

As one who has been trying to observe V485 Cen for many years, without ever
having seen it, I think the following remarks by Frank M Bateson in the
Publications of the RAS of New Zealand, No.10, p.13 (1982) will be of great
interest. He discusses observations made between 1978 and 1982.

"By disregarding... doubtful observations there are left 28 positive
observations that can definitely be stated to be of outbursts. The seven
outbursts which are summarised have a mean magnitude at maximum of 13.97,
ranging from 13.6 to 14.2. These outbursts have a mean width  at their peak
of 3.4 days.

It is concluded that the observations do not support the catalogued  range
of 12.9 to 16.5ptg.  The catalogued value for the mean cycle is 12: days. 
This seems to be unlikely, even allowing for the gaps in the present
observations, unless there are many somewhat fainter  maxima than 14.2 ."

Incidentally, the "Publications" were first published in 1972.

Jan Hers

VSNET Home Page

Return to Daisaku Nogami

---

vsnet-adm@kusastro.kyoto-u.ac.jp