ZTF J193724.89+152557.0 = another NSV 11599-like object?

Affiliation
American Association of Variable Star Observers (AAVSO)
Tue, 12/01/2020 - 20:53

Last week, NSV 11599 was detected in outburst by Gaia and turned out to be a known eclipsing binary (0.43 d.) with an EW-like light curve.
They seem to form a small group of long period systems with unusual and slow outbursts.

This other object was overlooked but might be undergoing a similar event according to Gaia data.

It is ZTF J193724.89+152557.0 = Gaia20fii in Aquila.
It brightened from a mean Gmag = 18.3 to G= 16.7 and was also classified as an EW with P= 0.92 d. in the ZTF DR2 catalogue.

The event is already 12 days old but it would be interesting to see what is happening with this object right now.
A microlensing event can't be ruled out but I guess the light curve would be complex in that case since this is a binary system.
All kind of observations are welcomed.

Cheers,
Sebastian