[vsnet-alert 25209] SS Cyg: rising from plateau

Keisuke Isogai isogai at kusastro.kyoto-u.ac.jp
Fri Jan 8 14:07:27 JST 2021


SS Cyg: rising from plateau

Akazawa-san and Kasai-san reported their observations.
SS Cyg underwent a rapid-rising outburst two weeks ago
and the magnitude had been at V~9.0 for 5--6 days. Then
the object brightened to 8.6 mag again.  The profile looks
not an inside-out outburst but a precursor + main outburst.
Such a precursor seems rare in SS Cyg.



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