[vsnet-chat 1663] Re: on the fast rise to maximum of U Sco

[Taichi Kato <tkato>]

Re: [vsnet-chat 1662] Re: on the fast rise to maximum of U Sco

> Berto's observation (I understand it caught U Sco during rise to
> maximum, the quiescence brightness being around 19 mag if my memory
> is still supporting me) is indeed perhaps unique in the U Sco history
> of previous outbursts (1863, 1906, 1936, 1979, 1987), because it is
> strategically placed in time to set a firm value on the onset time of such
> spectacular events.

   I have just learned some more indication of the extremely rapid rise
in the hostorical outburst of U Sco can be found in the Harvard plate
record of the 1936 outburst.  The object was caught before the maximum
(at mag ~11) and rose by 2 mag in 2 hours.  There is a description in
Burnham's Celestial Handbook.

Regards,
Taichi Kato

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