[vsnet-chat 8510] MGAB-V859 - a peculiar ER Ursae Majoris variable with a long standstill?

[Gabriel Murawski]

MGAB-V859 was discovered in October 2019 during data-mining search for
cataclysmic variables using ZTF DR1 data. It shows typical UGER variability
in the 2018 season (superoutbursts up to g=17.7 mag every 45-50 days with
up to 7 small outbursts between). It is similar in early 2019, however
after the last superoutburst in August 2019, the target had gone completely
to a standstill state. In the next three months, the target remained around
g=18.6 mag and the scatter indicates no variations above 0.5 mag. A hybrid
UGER+UGZ variable?

J2000 Position: 19 50 07.04 +36 40 17.2
VSX: https://www.aavso.org/vsx/index.php?view=detail.top&oid=1499208
Light curve: https://i.imgur.com/UPWWgmo.png (left part: 2018, right part:
2019)
ZTF data:
https://irsa.ipac.caltech.edu/cgi-bin/ZTF/nph_light_curves?POS=CIRCLE+297.52933+36.67146+0.0005&NOBS_MIN=3&BAD_CATFLAGS_MASK=32768&FORMAT=tsv

Regards,
Gabriel Murawski
libmar96 at gmail.com
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