[vsnet-alert 23716] MGAB-V284: Unique Z Cam star

[Kojiguchi Naoto]

MGAB-V284: Unique Z Cam star

     According to ZTF data, a large and long outburst triggered the standstill.
The outburst amplitudes between the standstills were gradually grown up.
While the outburst amplitude just after the end of the standstill is 2.5 mag
and the duration is 3 d, the outburst amplitude just before the standstill is
3.5 mag and the duration is 20 d. In addition, recurrence time might be 120 d
according to Apparent Magnitude on Lasair data
(https://lasair.roe.ac.uk/object/ZTF18abgpmcd/).

     Such a large outburst before a standstill is rare but the maximum
brightness is 18 mag.